WO2017140954A1 - Method and apparatus for separating carbon dioxide and for utilizing carbon dioxide - Google Patents

Method and apparatus for separating carbon dioxide and for utilizing carbon dioxide Download PDF

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Publication number
WO2017140954A1
WO2017140954A1 PCT/FI2017/050100 FI2017050100W WO2017140954A1 WO 2017140954 A1 WO2017140954 A1 WO 2017140954A1 FI 2017050100 W FI2017050100 W FI 2017050100W WO 2017140954 A1 WO2017140954 A1 WO 2017140954A1
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WO
WIPO (PCT)
Prior art keywords
carbon dioxide
building
air
conducted
hydrogen
Prior art date
Application number
PCT/FI2017/050100
Other languages
French (fr)
Inventor
Ari Piispanen
Original Assignee
Soletair Power Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Soletair Power Oy filed Critical Soletair Power Oy
Priority to CN201780011916.9A priority Critical patent/CN108700315A/en
Priority to EP17752734.8A priority patent/EP3417209A4/en
Priority to US15/998,924 priority patent/US11192065B2/en
Priority to EP23150124.8A priority patent/EP4177530A1/en
Publication of WO2017140954A1 publication Critical patent/WO2017140954A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/73—After-treatment of removed components
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
    • C07C1/12—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon from carbon dioxide with hydrogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/15—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively
    • C07C29/151—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases
    • C07C29/1516—Multisteps
    • C07C29/1518—Multisteps one step being the formation of initial mixture of carbon oxides and hydrogen for synthesis
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/60—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by adding oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/202—Hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C9/00—Aliphatic saturated hydrocarbons
    • C07C9/02—Aliphatic saturated hydrocarbons with one to four carbon atoms
    • C07C9/04—Methane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals

Definitions

  • the invention relates to a method defined in claim 1 and to an apparatus defined in claim 14 for separating and utilizing carbon dioxide, and to the use of the method defined in claim 18.
  • the objective of the invention is to disclose a new method for separating carbon dioxide from air of a building and for recovering and utilizing the carbon dioxide.
  • the objective of the invention is to disclose a method for reducing the level of car ⁇ bon dioxide in buildings and for improving the quality of indoor air.
  • the objective of the invention is to disclose a new apparatus to provide the improvement of the quality of indoor air.
  • the objective of the invention is to disclose an ener ⁇ gy-efficient assembly for separating carbon dioxide from air of a building and for utilizing the separated carbon dioxide.
  • carbon dioxide C0 2
  • the carbon dioxide is separated from air being con ⁇ ducted to a building and/or from air being circulated in a building to reduce the level of carbon dioxide in in ⁇ door air of the building, the carbon dioxide is recov- ered, and the carbon dioxide is conducted to a carbon dioxide treatment stage, where a chemical compound is formed from the carbon dioxide.
  • the air being con ⁇ ducted as indoor air to the building can be treated and cleaned, and the level of carbon dioxide of indoor air of the building can be reduced, and thereby the quality of indoor air of the building can be improved.
  • the separated carbon dioxide can be recovered and utilized. From the carbon dioxide, chemical products can be manufactured by various processes suited for the intended application.
  • the invention is based on an apparatus which comprises at least one separating device for separating carbon dioxide from air being conducted to a building and/or from air being circulated in a building to reduce the level of carbon dioxide in indoor air of the building, at least one set of means for arranging the treated air as indoor air of the building, at least one carbon dioxide treatment stage which comprises at least one treatment device and where a chemical compound is formed from the carbon dioxide, and at least one set of means for recovering carbon dioxide from the separat ⁇ ing device and for conducting it to the treatment stage.
  • the apparatus may comprise at least one feeding device for conducting air to the building.
  • the apparatus may comprise at least one set of circulating means for circulating air in the build- mg, such as for circulating exhaust air of the building back as the indoor air of the building.
  • a building is intended to mean any real property or building, such as a residential building, industrial building, hall, office space, public building or other such building.
  • air being conducted to a building is intended to mean any air being conducted for use as indoor air of the building, wherein the air may be derived directly from the atmosphere, or atmospheric air may have been pretreated in a certain way before be ⁇ ing conducted to the building.
  • the air is intended to mean air flowing to the ventilation system, e.g. a mechanical ventilation system, of the building .
  • air being circulated in a building is intended to mean any circulating air or exhaust air of the building being circulated or returned back as indoor air of the building.
  • the portion of air being circulated in the indoor air of the building may vary between 0 and 100 %.
  • the air being circulated may be treated and/or cleaned in addition to separating the carbon dioxide, e.g. by removing water or moisture.
  • the separation of carbon dioxide from air may be carried out by means of any separating device which is known per se in the art and which is suited for the intended purpose.
  • the separating device may be any separating or recovery device known per se, wherein the separation of carbon dioxide from air may be based on a chemical method, a physical method, an absorption method, a dissolution method, a membrane method, other suitable method or combinations thereof.
  • the separation of carbon dioxide from air may be carried out by means of a scrubber.
  • the separation of carbon dioxide from air may be carried out by means of a solid chemically active agent.
  • the feeding device for feeding the air to the separating device there may be used any device or means which is suited for the intended purpose and which is known in the art for conducting or sucking air to or through the separating device.
  • the air from which carbon dioxide has been removed can be fed or conducted from the separating device for use as indoor air of the building by any suitable means known per se, e.g. by a pipe, a cou- pling, a feeding device or combinations thereof.
  • a pipe e.g. a pipe, a cou- pling, a feeding device or combinations thereof.
  • the means for recovering carbon dioxide from the sepa ⁇ rating device and for conducting it to the treatment stage there may be used any means which is known per se and which is suited for the intended purpose, e.g. an exhaust pipe, an exhaust coupling, a recovery de ⁇ vice, a feeding device or other such means or combina ⁇ tions thereof.
  • carbon dioxide is separated from air being conducted to the building and from air being circulated in the building to reduce the level of carbon dioxide in indoor air of the building.
  • the air being circulated is air being ex ⁇ hausted from the building and conducted and mixed to the air being conducted to the building before the separat- ing stage, and carbon dioxide is separated from the mix ⁇ ture of the air being conducted to the building and the air being circulated in the building.
  • the air being circulated is air being exhausted from the building, from which carbon dioxide is separated, and the treated air is conducted for use as indoor air of the building or mixed to the indoor air being conducted to the building.
  • carbon dioxide is separated from air being conducted to the building.
  • carbon dioxide is separated from air be- ing circulated in the building.
  • the level of carbon diox ⁇ ide of the air being conducted for use as indoor air of the building is adjusted to be below 800 ppm, in one embodiment below 700 ppm, in one embodiment below 600 ppm, by means of the separation of carbon dioxide.
  • the level of carbon dioxide is at an appropriate level in terms of health in indoor air of the build ⁇ ing.
  • a high level of carbon dioxide in indoor air has a tiring effect and reduces stamina.
  • water is removed from air being conducted to the building and/or from air being circulated in the building in connection with separation of the carbon dioxide.
  • moisture is removed by means of heat, e.g. by means of a heat exchanger.
  • the water removed may be recovered and utilized, or alternatively piped as wastewater.
  • the water removed from air may be conducted to hydrogen formation, such as to electrolysis.
  • the apparatus comprises at least one set of means for removing water from air being conducted to the building and/or from air being circulated in the building in connection with the carbon dioxide separating device.
  • oxygen is conducted to air being conducted to the building and/or to air being circulated in the building or to the indoor air of the building in connection with or after the separation of carbon dioxide.
  • carbon dioxide is recovered and fed to the carbon dioxide treatment stage.
  • carbon dioxide is treated in the treatment stage by means of a hydrogen treatment, such as by means of hydrogen, in order to form a chemical com- pound.
  • heat generated in the carbon dioxide treatment stage is conducted to the carbon di- oxide separating stage.
  • heat gener ⁇ ated in the carbon dioxide treatment stage is conduct ⁇ ed to the heating of the building, e.g. to the tap wa ⁇ ter of the building.
  • a chemical compound such as an organ ⁇ ic and/or inorganic compound, is formed from carbon dioxide.
  • hydrocarbon is formed in one embodiment.
  • methane (CH 4 ) is formed in the carbon dioxide treatment stage.
  • other suitable hydrocarbon is formed in the carbon dioxide treatment stage.
  • an oxygen containing compound is formed in the carbon dioxide treatment stage in the carbon dioxide treatment stage in the carbon dioxide treatment stage in the carbon dioxide treatment stage in the carbon dioxide treatment stage an alcohol based compound, such as methanol, is formed.
  • the treatment of carbon dioxide is carried out by means of chemical synthesis either in the presence of a catalyst or without a catalyst.
  • the carbon dioxide treatment stage there may be used any device which is known per se in the art and which is suited for the intended purpose, the device being preferably arrangeable under conditions, e.g. pressure and temperature, that are suitable in terms of the process or synthesis.
  • the chemical compound, e.g. hydrocarbon, produced in the carbon dioxide treatment stage is recovered or processed further.
  • hydrocarbon e.g. methane (CH 4 )
  • CH 4 methane
  • the further processing may be carried out by any manner which is known per se and which is suited for the intended purpose.
  • the further processing of the chemical compound, such as hydrocar ⁇ bon is carried out by means of chemical synthesis, Fischer Tropsch (FT) synthesis, other suitable synthe- sis, polymerization, other suitable treatment or combinations thereof.
  • the method comprises a hy ⁇ drogen formation stage.
  • hydrogen is formed from water.
  • hydrogen is formed from water by electrolysis.
  • the apparatus comprises an electrolysis device for forming hydrogen from water.
  • any suitable electrolysis method and de ⁇ vice known in the art for forming hydrogen in one em- bodiment, the water produced in the treatment of car ⁇ bon dioxide is conducted to the formation of hydrogen.
  • the water removed from air being conducted to the building and/or from air being circulated in the building is conducted to the formation of hydrogen.
  • the water required for the formation of hydrogen may be derived from any suitable source, e.g.
  • the apparatus comprises at least one set of means for conducting water produced in the treatment of carbon dioxide or water removed from air being conducted to the building and/or from air being circulated in the building to the formation of hydrogen, such as to an electrolysis device.
  • the hydrogen formed is conducted to the carbon dioxide treatment stage.
  • the apparatus comprises means for con ⁇ ducting hydrogen from electrolysis to the carbon dioxide treatment stage.
  • the hydrogen formed is fed to the manufacture of a chemical com ⁇ pound, e.g. an inorganic or organic chemical compound.
  • the hydrogen formed is fed to the manufacture of a hydrocarbon compound.
  • hydrogen formed is conducted to the manufacture of an ammonia based compound.
  • ammo- nia may be manufactured from hydrogen and nitrogen of the air.
  • from the ammonia based compound other nitrogen containing compounds are formed by further processing.
  • heat generated in the for- mation of hydrogen is conducted to the carbon dioxide separating stage. In one embodiment, heat generated in the formation of hydrogen is conducted to the heating of the building, e.g. to the tap water of the build ⁇ ing .
  • oxygen produced in the formation of hydrogen is conducted to air being conducted to the building, to air being circulated in the building and/or to the indoor air.
  • the apparatus comprises means for conducting oxygen from the formation of hydrogen to air being conducted to the building, to air being circulated in the build ⁇ ing and/or to the indoor air.
  • the oxygen produced in the formation of hydrogen is a product which is recovered. The oxygen can be used as a product, e.g. as bottled oxygen or industrial oxy ⁇ gen .
  • surplus elec ⁇ tricity is used as electricity required for the for ⁇ mation of hydrogen, when electricity is formed in ex- cess relative to electricity consumption.
  • electricity generated in a wind power device or a solar cell device is used as electricity required for the formation of hydrogen.
  • electrolysis serves as a buffer of electricity produc- tion, whereby the electrolysis stage is implemented when there is surplus electricity.
  • carbon dioxide separated from air being conducted to the building and/or from air being circulated in the building is conducted to a separate chemical process, to a storage, or back to the ambient air.
  • the apparatus comprises a shell structure, e.g. walls, a floor and a ceiling, inside of which the components of the apparatus are arrangeable.
  • the apparatus may be arranged in a transportation container or other such easily moveable and/or transportable space.
  • the apparatus functions as a separate unit which is easily moveable and/or arrangeable to the target site.
  • the method and the apparatus according to the invention may be used in the treatment of indoor air of a building, in the manufacture of hydrocarbons, in the manufacture of hydrogen and in combinations there ⁇ of.
  • the method and the apparatus according to the in- vention may be used in conjunction with any building.
  • the method according to the invention is integratable with the ventilation system, e.g. a mechanical venti ⁇ lation system, of the building.
  • the apparatus accord ⁇ ing to the invention is connectable so that it func- tions in conjunction with the ventilation system of the building.
  • the indoor air of any building can be improved by removing carbon dioxide from it. Air being conducted to a building can be treated and the quality of indoor air improved in large and small buildings with the apparatus according to the invention. By means of the invention, the indoor air of small sites can also be cleaned flexibly and efficiently. By means of the invention, the degree of intake air and ventilation can also be reduced in a building, and thus the need of heating or cooling en- ergy, and thereby the operating costs, of ventilation can be decreased.
  • hydrocarbons can be cost- effectively produced and non-fossil energy economical- ly generated by the method and the apparatus according to the invention.
  • the apparatus according to the invention may be connected to buildings easily and cost-effectively. LIST OF FIGURES
  • Fig. 1 presents one apparatus according to the invention
  • Fig. 2 presents another apparatus according to the invention.
  • Fig. 3 presents another apparatus according to the invention.
  • Fig. 1 presents an apparatus for separating and recovering carbon dioxide from air being conducted to a building and/or from air being circulated in a building and for utilizing the carbon dioxide.
  • carbon dioxide, C0 2 , (3a, 3b) is separated from air (la) being conducted to a building, and additionally or optionally from air (lc,ld) being circulated in the building, by means of a carbon dioxide separating device (2a) , and optionally by means of a separating device (2b) , to reduce the level of carbon dioxide in indoor air (lb) of the building (4) .
  • the carbon dioxide (3a, 3b) is recovered and con ⁇ ducted to a carbon dioxide treatment stage (5) .
  • the ap- paratus comprises a separating device (2a, 2b) for sepa ⁇ rating carbon dioxide (3a, 3b) from air (la) being conducted to a building and/or from air (lc,ld) being circulated in the building, means for arranging the treat- ed air as indoor air (lb) of the building, and a carbon dioxide treatment stage (5) which comprises a treatment device in order to form a chemical compound (6) from carbon dioxide by means of hydrogen treatment and hydrogen (12) .
  • the apparatus compris- es means for recovering the carbon dioxide from the separating device and for conducting it to the treatment stage (5) .
  • the apparatus may com ⁇ prise a feeding device for feeding the air (la) to the separating device (2a) .
  • the level of carbon diox ⁇ ide of the indoor air (lb) being fed to the building (4) is adjusted to be below 700 ppm by means of the separation of carbon dioxide.
  • Fig. 2 presents an apparatus for recovering carbon dioxide from air being conducted to a building and for utilizing it in the manufacture of a chemical compound.
  • Fig. 3 presents an apparatus for recovering carbon dioxide from air being conducted to a building and for utilizing it in the manufacture of a chemical compound and for the manufacture of hydrogen.
  • the apparatuses of Fig. 2 and 3 comprise a separating device (2a) of the type presented in Exam ⁇ ple 1 and in Fig. 1 for separating carbon dioxide (3a) from air (la) being conducted to a building (4) .
  • the apparatuses comprise means for recover ⁇ ing the carbon dioxide (3a) and for conducting it to a treatment stage (5) .
  • the treatment stage (5) comprises at least one treatment device in order to form a chem ⁇ ical compound (6) by means of hydrogen (12) .
  • Organic compounds, such as methane or methanol, can be manu- factured from the carbon dioxide by means of hydrogen treatment.
  • the organic compounds may be processed fur ⁇ ther (7) into target compounds (8) .
  • the apparatus comprises means for conducting heat (9) gen ⁇ erated in the carbon dioxide treatment stage (5) to the carbon dioxide separating device (2a) .
  • the apparatus comprises means for removing water (10) from the air (la) being conducted to the building in connection with the carbon dioxide separation (2a) , and removal means for removing water (11) produced in the carbon dioxide treatment stage (5) .
  • the apparatus of Fig. 3 comprising ⁇ es an electrolysis device (16) for forming hydrogen (12) from water.
  • Hydrogen can be manufactured from water by means of electrolysis, wherein the electrolysis can be carried out in a manner known per se.
  • Electric ⁇ ity (14) required for the electrolysis may preferably be surplus electricity of electricity production e.g. from a wind power device or a solar cell device.
  • the apparatus comprises means for removing water (10) from the air (la) being conducted to the building in connection with the carbon dioxide separation (2a) , and means for conducting the water to the electrolysis (16) .
  • the apparatus compris ⁇ es means for conducting water (11) produced in the carbon dioxide treatment stage (5) to the electrolysis (16) .
  • the apparatus comprises means for conducting hydrogen (12) from the electrolysis (16) to the carbon dioxide treatment stage (5) .
  • the apparatus may comprise means for feeding hydrogen to the manufacture of ammonia, where ammonia is manu ⁇ factured from hydrogen and nitrogen of the air.
  • the apparatus (Fig. 3) comprises means for conducting heat (15) generated in the elec ⁇ trolysis (16) to the carbon dioxide separating device (2a) and means for conducting oxygen (13) to indoor air (lb) of the building from the electrolysis (16) .
  • the method and the apparatus according to the invention are suited as different embodiments for use in a variety of applications for separating and also recovering carbon dioxide as well as for treating and cleaning the indoor air of a building.
  • the method and the apparatus according to the inven ⁇ tion are suited as different embodiments for use in the manufacture of a variety of chemical compounds.
  • the method and the apparatus according to the invention are suited as different embodiments for use in connection with a variety of processes utilizing carbon dioxide.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention relates to a method and to an apparatus for separating and utilizing carbon dioxide. According to the invention, carbon dioxide (3a, 3b) is separated from air (la) being conducted to a building and/or from air (1c,1d) being circulated in the building to reduce the level of carbon dioxide in indoor air (lb) of the building (4), the carbon dioxide (3a, 3b) is recovered, and the carbon dioxide is conducted to a carbon dioxide treatment stage (5), where a chemical compound (6) is formed from the carbon dioxide. In addition, the invention relates to the use of the method.

Description

METHOD AND APPARATUS FOR SEPARATING CARBON DIOXIDE AND FOR UTILIZING CARBON DIOXIDE
FIELD OF THE INVENTION
The invention relates to a method defined in claim 1 and to an apparatus defined in claim 14 for separating and utilizing carbon dioxide, and to the use of the method defined in claim 18.
BACKGROUND OF THE INVENTION
Various methods are known in the prior art for separating and recovering carbon dioxide from gaseous material or gaseous stream.
It is also known that carbon dioxide is det¬ rimental to health at high levels. The problem is that in the indoor air of buildings the level of carbon di¬ oxide often rises high. In addition, in large cities the level of carbon dioxide in air is constantly very high, also outdoors.
OBJECTIVE OF THE INVENTION
The objective of the invention is to disclose a new method for separating carbon dioxide from air of a building and for recovering and utilizing the carbon dioxide. In addition, the objective of the invention is to disclose a method for reducing the level of car¬ bon dioxide in buildings and for improving the quality of indoor air. In addition, the objective of the invention is to disclose a new apparatus to provide the improvement of the quality of indoor air. In addition, the objective of the invention is to disclose an ener¬ gy-efficient assembly for separating carbon dioxide from air of a building and for utilizing the separated carbon dioxide. SUMMARY OF THE INVENTION
The method and the apparatus according to the invention are characterized by the features presented in the claims.
In the method according to the invention, carbon dioxide, C02, is separated from air being con¬ ducted to a building and/or from air being circulated in a building to reduce the level of carbon dioxide in in¬ door air of the building, the carbon dioxide is recov- ered, and the carbon dioxide is conducted to a carbon dioxide treatment stage, where a chemical compound is formed from the carbon dioxide. Thus the air being con¬ ducted as indoor air to the building can be treated and cleaned, and the level of carbon dioxide of indoor air of the building can be reduced, and thereby the quality of indoor air of the building can be improved. In addition, the separated carbon dioxide can be recovered and utilized. From the carbon dioxide, chemical products can be manufactured by various processes suited for the intended application.
In addition, the invention is based on an apparatus which comprises at least one separating device for separating carbon dioxide from air being conducted to a building and/or from air being circulated in a building to reduce the level of carbon dioxide in indoor air of the building, at least one set of means for arranging the treated air as indoor air of the building, at least one carbon dioxide treatment stage which comprises at least one treatment device and where a chemical compound is formed from the carbon dioxide, and at least one set of means for recovering carbon dioxide from the separat¬ ing device and for conducting it to the treatment stage. In addition, the apparatus may comprise at least one feeding device for conducting air to the building. In addition, the apparatus may comprise at least one set of circulating means for circulating air in the build- mg, such as for circulating exhaust air of the building back as the indoor air of the building.
In this connection, a building is intended to mean any real property or building, such as a residential building, industrial building, hall, office space, public building or other such building.
In this connection, air being conducted to a building is intended to mean any air being conducted for use as indoor air of the building, wherein the air may be derived directly from the atmosphere, or atmospheric air may have been pretreated in a certain way before be¬ ing conducted to the building. In one embodiment, the air is intended to mean air flowing to the ventilation system, e.g. a mechanical ventilation system, of the building .
In this connection, air being circulated in a building is intended to mean any circulating air or exhaust air of the building being circulated or returned back as indoor air of the building. The portion of air being circulated in the indoor air of the building may vary between 0 and 100 %. The air being circulated may be treated and/or cleaned in addition to separating the carbon dioxide, e.g. by removing water or moisture.
The separation of carbon dioxide from air may be carried out by means of any separating device which is known per se in the art and which is suited for the intended purpose. The separating device may be any separating or recovery device known per se, wherein the separation of carbon dioxide from air may be based on a chemical method, a physical method, an absorption method, a dissolution method, a membrane method, other suitable method or combinations thereof. In one embod¬ iment, the separation of carbon dioxide from air may be carried out by means of a scrubber. In one embodi¬ ment, the separation of carbon dioxide from air may be carried out by means of a solid chemically active agent. As the feeding device for feeding the air to the separating device, there may be used any device or means which is suited for the intended purpose and which is known in the art for conducting or sucking air to or through the separating device.
The air from which carbon dioxide has been removed can be fed or conducted from the separating device for use as indoor air of the building by any suitable means known per se, e.g. by a pipe, a cou- pling, a feeding device or combinations thereof. As the means for recovering carbon dioxide from the sepa¬ rating device and for conducting it to the treatment stage, there may be used any means which is known per se and which is suited for the intended purpose, e.g. an exhaust pipe, an exhaust coupling, a recovery de¬ vice, a feeding device or other such means or combina¬ tions thereof.
In one embodiment, carbon dioxide is separated from air being conducted to the building and from air being circulated in the building to reduce the level of carbon dioxide in indoor air of the building. In one embodiment, the air being circulated is air being ex¬ hausted from the building and conducted and mixed to the air being conducted to the building before the separat- ing stage, and carbon dioxide is separated from the mix¬ ture of the air being conducted to the building and the air being circulated in the building. In one embodiment, the air being circulated is air being exhausted from the building, from which carbon dioxide is separated, and the treated air is conducted for use as indoor air of the building or mixed to the indoor air being conducted to the building. In one embodiment, carbon dioxide is separated from air being conducted to the building. In one embodiment, carbon dioxide is separated from air be- ing circulated in the building. In one embodiment, the level of carbon diox¬ ide of the air being conducted for use as indoor air of the building is adjusted to be below 800 ppm, in one embodiment below 700 ppm, in one embodiment below 600 ppm, by means of the separation of carbon dioxide. Thus, the level of carbon dioxide is at an appropriate level in terms of health in indoor air of the build¬ ing. A high level of carbon dioxide in indoor air has a tiring effect and reduces stamina.
In one embodiment, water is removed from air being conducted to the building and/or from air being circulated in the building in connection with separation of the carbon dioxide. Thus the humidity of in¬ door air of the building can be reduced. In one embod- iment, moisture is removed by means of heat, e.g. by means of a heat exchanger. The water removed may be recovered and utilized, or alternatively piped as wastewater. In one embodiment, the water removed from air may be conducted to hydrogen formation, such as to electrolysis. In one embodiment, the apparatus comprises at least one set of means for removing water from air being conducted to the building and/or from air being circulated in the building in connection with the carbon dioxide separating device.
In one embodiment, oxygen is conducted to air being conducted to the building and/or to air being circulated in the building or to the indoor air of the building in connection with or after the separation of carbon dioxide.
Preferably, carbon dioxide is recovered and fed to the carbon dioxide treatment stage. In one em¬ bodiment, carbon dioxide is treated in the treatment stage by means of a hydrogen treatment, such as by means of hydrogen, in order to form a chemical com- pound. In one embodiment, heat generated in the carbon dioxide treatment stage is conducted to the carbon di- oxide separating stage. In one embodiment, heat gener¬ ated in the carbon dioxide treatment stage is conduct¬ ed to the heating of the building, e.g. to the tap wa¬ ter of the building.
In one embodiment, in the carbon dioxide treatment stage a chemical compound, such as an organ¬ ic and/or inorganic compound, is formed from carbon dioxide. In one embodiment, in the carbon dioxide treatment stage hydrocarbon is formed. In one embodi- ment, in the carbon dioxide treatment stage methane (CH4) is formed. In one embodiment, in the carbon di¬ oxide treatment stage other suitable hydrocarbon is formed. In one embodiment, in the carbon dioxide treatment stage an oxygen containing compound is formed. In one embodiment, in the carbon dioxide treatment stage an alcohol based compound, such as methanol, is formed. In one embodiment, the treatment of carbon dioxide is carried out by means of chemical synthesis either in the presence of a catalyst or without a catalyst. In the carbon dioxide treatment stage there may be used any device which is known per se in the art and which is suited for the intended purpose, the device being preferably arrangeable under conditions, e.g. pressure and temperature, that are suitable in terms of the process or synthesis.
In one embodiment, the chemical compound, e.g. hydrocarbon, produced in the carbon dioxide treatment stage is recovered or processed further. In one embodiment, in the carbon dioxide treatment stage hydrocarbon, e.g. methane (CH4) , is formed to be used as fuel or as energy raw material or alternatively to be conducted for further processing, e.g. into longer chain hydrocarbon, a hydrocarbon based compound, a polymer, a plastic or other suitable compound or prod- uct . The further processing may be carried out by any manner which is known per se and which is suited for the intended purpose. In one embodiment, the further processing of the chemical compound, such as hydrocar¬ bon, is carried out by means of chemical synthesis, Fischer Tropsch (FT) synthesis, other suitable synthe- sis, polymerization, other suitable treatment or combinations thereof.
In one embodiment, the method comprises a hy¬ drogen formation stage. In one embodiment, hydrogen is formed from water. In one embodiment, hydrogen is formed from water by electrolysis. In one embodiment, the apparatus comprises an electrolysis device for forming hydrogen from water. In this connection there may be used any suitable electrolysis method and de¬ vice known in the art for forming hydrogen. In one em- bodiment, the water produced in the treatment of car¬ bon dioxide is conducted to the formation of hydrogen. In one embodiment, the water removed from air being conducted to the building and/or from air being circulated in the building is conducted to the formation of hydrogen. Alternatively, the water required for the formation of hydrogen may be derived from any suitable source, e.g. from a water supply network, a rainwater system or an exhaust air system or other suitable source. In one embodiment, the apparatus comprises at least one set of means for conducting water produced in the treatment of carbon dioxide or water removed from air being conducted to the building and/or from air being circulated in the building to the formation of hydrogen, such as to an electrolysis device.
In one embodiment, the hydrogen formed is conducted to the carbon dioxide treatment stage. In one embodiment, the apparatus comprises means for con¬ ducting hydrogen from electrolysis to the carbon dioxide treatment stage. In one embodiment, the hydrogen formed is fed to the manufacture of a chemical com¬ pound, e.g. an inorganic or organic chemical compound. In one embodiment, the hydrogen formed is fed to the manufacture of a hydrocarbon compound. In one embodi¬ ment, hydrogen formed is conducted to the manufacture of an ammonia based compound. In one embodiment, ammo- nia may be manufactured from hydrogen and nitrogen of the air. In one embodiment, from the ammonia based compound other nitrogen containing compounds are formed by further processing.
In one embodiment, heat generated in the for- mation of hydrogen is conducted to the carbon dioxide separating stage. In one embodiment, heat generated in the formation of hydrogen is conducted to the heating of the building, e.g. to the tap water of the build¬ ing .
In one embodiment, oxygen produced in the formation of hydrogen is conducted to air being conducted to the building, to air being circulated in the building and/or to the indoor air. In one embodiment, the apparatus comprises means for conducting oxygen from the formation of hydrogen to air being conducted to the building, to air being circulated in the build¬ ing and/or to the indoor air. In one embodiment, the oxygen produced in the formation of hydrogen is a product which is recovered. The oxygen can be used as a product, e.g. as bottled oxygen or industrial oxy¬ gen .
In one embodiment, so called surplus elec¬ tricity is used as electricity required for the for¬ mation of hydrogen, when electricity is formed in ex- cess relative to electricity consumption. In one em¬ bodiment, electricity generated in a wind power device or a solar cell device is used as electricity required for the formation of hydrogen. In one embodiment, electrolysis serves as a buffer of electricity produc- tion, whereby the electrolysis stage is implemented when there is surplus electricity. In one embodiment, carbon dioxide separated from air being conducted to the building and/or from air being circulated in the building is conducted to a separate chemical process, to a storage, or back to the ambient air.
In one embodiment, the apparatus comprises a shell structure, e.g. walls, a floor and a ceiling, inside of which the components of the apparatus are arrangeable. In one embodiment, the apparatus may be arranged in a transportation container or other such easily moveable and/or transportable space. In one em¬ bodiment, the apparatus functions as a separate unit which is easily moveable and/or arrangeable to the target site.
The method and the apparatus according to the invention may be used in the treatment of indoor air of a building, in the manufacture of hydrocarbons, in the manufacture of hydrogen and in combinations there¬ of. The method and the apparatus according to the in- vention may be used in conjunction with any building. The method according to the invention is integratable with the ventilation system, e.g. a mechanical venti¬ lation system, of the building. The apparatus accord¬ ing to the invention is connectable so that it func- tions in conjunction with the ventilation system of the building.
By means of the invention, the indoor air of any building can be improved by removing carbon dioxide from it. Air being conducted to a building can be treated and the quality of indoor air improved in large and small buildings with the apparatus according to the invention. By means of the invention, the indoor air of small sites can also be cleaned flexibly and efficiently. By means of the invention, the degree of intake air and ventilation can also be reduced in a building, and thus the need of heating or cooling en- ergy, and thereby the operating costs, of ventilation can be decreased.
In addition, hydrocarbons can be cost- effectively produced and non-fossil energy economical- ly generated by the method and the apparatus according to the invention.
The apparatus according to the invention may be connected to buildings easily and cost-effectively. LIST OF FIGURES
Fig. 1 presents one apparatus according to the invention,
Fig. 2 presents another apparatus according to the invention, and
Fig. 3 presents another apparatus according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
The invention will be described below by way of detailed examples of its embodiments with reference to the accompanying figures.
Example 1
Fig. 1 presents an apparatus for separating and recovering carbon dioxide from air being conducted to a building and/or from air being circulated in a building and for utilizing the carbon dioxide.
In the apparatus of Fig. 1, carbon dioxide, C02, (3a, 3b) is separated from air (la) being conducted to a building, and additionally or optionally from air (lc,ld) being circulated in the building, by means of a carbon dioxide separating device (2a) , and optionally by means of a separating device (2b) , to reduce the level of carbon dioxide in indoor air (lb) of the building (4) . The carbon dioxide (3a, 3b) is recovered and con¬ ducted to a carbon dioxide treatment stage (5) . The ap- paratus comprises a separating device (2a, 2b) for sepa¬ rating carbon dioxide (3a, 3b) from air (la) being conducted to a building and/or from air (lc,ld) being circulated in the building, means for arranging the treat- ed air as indoor air (lb) of the building, and a carbon dioxide treatment stage (5) which comprises a treatment device in order to form a chemical compound (6) from carbon dioxide by means of hydrogen treatment and hydrogen (12) . In addition, the apparatus compris- es means for recovering the carbon dioxide from the separating device and for conducting it to the treatment stage (5) . In addition, the apparatus may com¬ prise a feeding device for feeding the air (la) to the separating device (2a) .
In one embodiment, the level of carbon diox¬ ide of the indoor air (lb) being fed to the building (4) is adjusted to be below 700 ppm by means of the separation of carbon dioxide. Example 2
Fig. 2 presents an apparatus for recovering carbon dioxide from air being conducted to a building and for utilizing it in the manufacture of a chemical compound. Fig. 3 presents an apparatus for recovering carbon dioxide from air being conducted to a building and for utilizing it in the manufacture of a chemical compound and for the manufacture of hydrogen. By the apparatuses as shown in Fig. 2 and 3 the level of car¬ bon dioxide of indoor air of the building can be re- duced.
The apparatuses of Fig. 2 and 3 comprise a separating device (2a) of the type presented in Exam¬ ple 1 and in Fig. 1 for separating carbon dioxide (3a) from air (la) being conducted to a building (4) . In addition, the apparatuses comprise means for recover¬ ing the carbon dioxide (3a) and for conducting it to a treatment stage (5) . The treatment stage (5) comprises at least one treatment device in order to form a chem¬ ical compound (6) by means of hydrogen (12) . Organic compounds, such as methane or methanol, can be manu- factured from the carbon dioxide by means of hydrogen treatment. The organic compounds may be processed fur¬ ther (7) into target compounds (8) . In addition, the apparatus comprises means for conducting heat (9) gen¬ erated in the carbon dioxide treatment stage (5) to the carbon dioxide separating device (2a) . In addi¬ tion, the apparatus comprises means for removing water (10) from the air (la) being conducted to the building in connection with the carbon dioxide separation (2a) , and removal means for removing water (11) produced in the carbon dioxide treatment stage (5) .
In addition, the apparatus of Fig. 3 compris¬ es an electrolysis device (16) for forming hydrogen (12) from water. Hydrogen can be manufactured from water by means of electrolysis, wherein the electrolysis can be carried out in a manner known per se. Electric¬ ity (14) required for the electrolysis may preferably be surplus electricity of electricity production e.g. from a wind power device or a solar cell device. In addition, the apparatus comprises means for removing water (10) from the air (la) being conducted to the building in connection with the carbon dioxide separation (2a) , and means for conducting the water to the electrolysis (16) . In addition, the apparatus compris¬ es means for conducting water (11) produced in the carbon dioxide treatment stage (5) to the electrolysis (16) . In addition, the apparatus comprises means for conducting hydrogen (12) from the electrolysis (16) to the carbon dioxide treatment stage (5) . In addition, the apparatus may comprise means for feeding hydrogen to the manufacture of ammonia, where ammonia is manu¬ factured from hydrogen and nitrogen of the air. In addition, the apparatus (Fig. 3) comprises means for conducting heat (15) generated in the elec¬ trolysis (16) to the carbon dioxide separating device (2a) and means for conducting oxygen (13) to indoor air (lb) of the building from the electrolysis (16) .
The method and the apparatus according to the invention are suited as different embodiments for use in a variety of applications for separating and also recovering carbon dioxide as well as for treating and cleaning the indoor air of a building. In addition, the method and the apparatus according to the inven¬ tion are suited as different embodiments for use in the manufacture of a variety of chemical compounds. In addition, the method and the apparatus according to the invention are suited as different embodiments for use in connection with a variety of processes utilizing carbon dioxide.
The invention is not exclusively limited to the above examples, but many variations are possible within the scope of the inventive idea defined by the claims .

Claims

1. A method for separating and utilizing carbon dioxide, c h a r a c t e r i z e d in that carbon dioxide (3a, 3b) is separated from air (la) being conducted to a building and/or from air (lc,ld) being circulated in the building to reduce the level of carbon dioxide in indoor air (lb) of the building (4), the carbon dioxide (3a, 3b) is recovered, and the carbon dioxide is conducted to a carbon dioxide treatment stage (5), where carbon diox¬ ide is treated by means of hydrogen (12) in order to form a chemical compound (6) .
2. The method according to claim 1, c h a r a c t e r i z e d in that water (10) is removed from the air (la) being conducted to the building and/or from the air (lc,ld) being circulated in the building in connection with carbon dioxide separation (2a, 2b) .
3. The method according to claim 1 or 2, c h a r a c t e r i z e d in that hydrocarbon is formed in the carbon dioxide treatment stage (5) .
4. The method according to any one of claims 1 to 3, c h a r a c t e r i z e d in that methane (CH4) is formed in the carbon dioxide treatment stage (5) .
5. The method according to any one of claims 1 to 4, c h a r a c t e r i z e d in that heat (9) generat¬ ed in the carbon dioxide treatment stage (5) is con¬ ducted to the separation of carbon dioxide.
6. The method according to any one of claims 1 to 5, c h a r a c t e r i z e d in that hydrogen (12) is formed by electrolysis (16) from water.
7. The method according to claim 6, c h a r a c t e r i z e d in that the hydrogen (12) is conducted to the carbon dioxide treatment stage (5) .
8. The method according to claim 6, c h a r - a c t e r i z e d in that hydrogen (12) formed is con- ducted to the manufacture of an ammonia based com¬ pound.
9. The method according to any one of claims 1 to 8, c h a r a c t e r i z e d in that water (10) re- moved in connection with the separation of carbon dioxide is conducted to the electrolysis (16) .
10. The method according to any one of claims 1 to 9, c h a r a c t e r i z e d in that water (11) pro¬ duced in the carbon dioxide treatment stage (5) is con- ducted to the electrolysis (16) .
11. The method according to any one of claims 1 to 10, c h a r a c t e r i z e d in that heat (15) gener¬ ated in the hydrogen formation (16) is conducted to the separation of carbon dioxide.
12. The method according to any one of claims 1 to 11, c h a r a c t e r i z e d in that oxygen (13) pro¬ duced in the hydrogen formation (16) is conducted to the air (la) being conducted to the building, to the air (lc,ld) being circulated in the building and/or to the indoor air (lb) .
13. An apparatus for separating and utilizing carbon dioxide, c h a r a c t e r i z e d in that the ap¬ paratus comprises at least one separating device (2a, 2b) for separating carbon dioxide (3a, 3b) from air (la) being conducted to a building and/or from air (lc,ld) being circulated in the building to reduce the level of carbon dioxide in indoor air (lb) of the building (4), at least one set of means for arranging the treated air as the indoor air (lb) of the building, at least one carbon dioxide (3a, 3b) treatment stage (5), which com¬ prises at least one treatment device and where carbon dioxide is treated by means of hydrogen (12) in order to form a chemical compound (6) , and at least one set of means for recovering the carbon dioxide (3a, 3b) from the separating device (2a, 2b) and for conducting it to the treatment stage (5) .
14. The apparatus according to claim 13, c h a r a c t e r i z e d in that the apparatus comprises at least one set of means for removing water (10) from the air (la) being conducted to the building and/or from the air (lc,ld) being circulated in the building in connection with the carbon dioxide separating device (2a, 2b) .
15. The apparatus according to claim 13 or 14, c h a r a c t e r i z e d in that the apparatus comprises an electrolysis device (16) for forming hydrogen (12) from water.
16. The apparatus according to any one of claims 13 to 15, c h a r a c t e r i z e d in that the apparatus comprises means for conducting hydrogen (12) from the electrolysis (16) to the carbon dioxide treatment stage (5) .
17. Use of the method according to any one of claims 1 to 12, ch a r a c t e r i z e d in that the method is used in the treatment of indoor air of a building, in the manufacture of hydrocarbons, in the manufacture of hydrogen and in combinations thereof.
PCT/FI2017/050100 2016-02-18 2017-02-16 Method and apparatus for separating carbon dioxide and for utilizing carbon dioxide WO2017140954A1 (en)

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US15/998,924 US11192065B2 (en) 2016-02-18 2017-02-16 Method and apparatus for separating carbon dioxide and for utilizing carbon dioxide
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EP4177530A1 (en) 2023-05-10
EP3417209A1 (en) 2018-12-26
US20210205755A1 (en) 2021-07-08
US11192065B2 (en) 2021-12-07
FI130719B1 (en) 2024-02-08
FI20165119L (en) 2017-08-19
CN108700315A (en) 2018-10-23
EP3417209A4 (en) 2019-10-02

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