WO2021048467A1 - Method and process arrangement for the production of oxygen for industrial process, and use of the method - Google Patents

Method and process arrangement for the production of oxygen for industrial process, and use of the method Download PDF

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Publication number
WO2021048467A1
WO2021048467A1 PCT/FI2020/050576 FI2020050576W WO2021048467A1 WO 2021048467 A1 WO2021048467 A1 WO 2021048467A1 FI 2020050576 W FI2020050576 W FI 2020050576W WO 2021048467 A1 WO2021048467 A1 WO 2021048467A1
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Prior art keywords
carbon dioxide
electrolysis
oxygen
air
conducted
Prior art date
Application number
PCT/FI2020/050576
Other languages
French (fr)
Inventor
Ari Piispanen
Original Assignee
Soletair Power Oy
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Filing date
Publication date
Application filed by Soletair Power Oy filed Critical Soletair Power Oy
Priority to EP20862549.1A priority Critical patent/EP4028579A1/en
Publication of WO2021048467A1 publication Critical patent/WO2021048467A1/en

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Classifications

    • 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
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02—Preparation of oxygen
    • C01B13/0203—Preparation of oxygen from inorganic compounds
    • C01B13/0207—Water
    • 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
    • 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
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C25B15/081—Supplying products to non-electrochemical reactors that are combined with the electrochemical cell, e.g. Sabatier reactor
    • 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

Definitions

  • the invention relates to the method defined in claim 1 and to the process arrangement defined in claim 10 for the production of oxygen for an industri al process, and to the use of the method as defined in claim 15.
  • An object of the invention is to disclose a new type of method and process arrangement for the production of oxygen for a desired industrial process.
  • an object of the invention is to disclose a new type of arrangement for the production of oxygen in an environmentally-friendly and energy-efficient way.
  • an object of the invention is to disclose a method and process arrangement for utiliz ing carbon dioxide and for reducing carbon dioxide emissions entering the atmosphere.
  • an ob ject of the invention is to disclose an arrangement in which oxygen may be produced in connection with the recovery of carbon dioxide, while at the same time the carbon dioxide may be comprehensively utilized, where by carbon dioxide emissions into the atmosphere may be reduced.
  • oxygen is produced for an industrial process in connection with the recovery of carbon dioxide.
  • carbon dioxide is recovered from air, gas or liquid in connection with an industrial process, e.g. a pulp manufacturing process or a metal alloy manufacturing process.
  • Water is conducted to an electrolysis provid ed in connection with the recovery or treatment of the carbon dioxide, in which electrolysis oxygen and hy- drogen are produced.
  • the carbon dioxide is conducted to a hydrocarbon synthesis for treating the carbon di oxide and for producing hydrocarbons, and the hydrogen produced in the electrolysis is conducted to the hy drocarbon synthesis.
  • the oxygen produced in the elec- trolysis is recovered for a selected industrial pro cess, preferably by conducting the oxygen to the se lected industrial process.
  • the process arrangement for the production of oxygen for an industrial process comprises at least one carbon dioxide recovery device for recovering carbon dioxide from air, gas or liquid in connection with an industrial process, at least one electrolysis device provided in connection with the recovery or treatment of the carbon dioxide, to which electrolysis device wa- ter is conducted and in which electrolysis device oxy gen and hydrogen are produced from the water, at least one hydrocarbon synthesis device in which the recovered carbon dioxide is treated and hydrocarbons are produced from the recovered carbon dioxide, at least one hydro gen transfer device for conducting the hydrogen pro Jerusalem in the electrolysis to the hydrocarbon synthesis device, and at least one oxygen recovery device for re covering the oxygen produced in the electrolysis for a selected industrial process, and preferably by conduct ing the oxygen to the selected industrial process.
  • carbon dioxide is recov ered from air, e.g. air being conducted to a property or building, air being circulated therein, air being removed therefrom or ambient air, such as outdoor air.
  • carbon dioxide is recovered from a gas, such as from exhaust gases, from a combustion gas and/or from a flue gas, e.g. from an energy production exhaust gas.
  • carbon dioxide is re covered from outdoor air, from air being conducted to a property, from air being circulated in a property and/or from a property's exhaust air.
  • carbon dioxide is recovered from air, such as from outdoor air or from ambient air.
  • carbon dioxide is recovered from a liquid which may be a mixture of a liquid and a gas or a liquid alone, e.g. process water or sea water.
  • carbon dioxide is recovered from exhaust gases of a selected industrial process, such as the manufacture of pulp or a metal alloy, a se lected process or process stage, or from exhaust gases of a manufacturing process.
  • a property refers to any property or building, wherein the property may com prise more than one building, e.g. an industrial prop erty, an industrial plant, a plant or line designated for the manufacture of a specific product or products, or another building complex.
  • Carbon dioxide may be recovered by means of any carbon dioxide recovery device which is suitable for the purpose.
  • the recovery device may be any sepa ration or recovery device which is known per se and in which the separation of carbon dioxide from air, gas or liquid may be based on a chemical method, a physi cal method, an absorption method, a dissolution meth od, a membrane method, another suitable method or their combinations.
  • the carbon di oxide recovery device is a DAC (direct air capture) device.
  • water is separated from the air, gas or liquid in connection with the carbon dioxide recovery, and the separated water is conducted to the electrolysis for producing the oxygen and hy drogen.
  • water is separated from air.
  • water is separated from a gas.
  • water is separated from a liquid.
  • the separation of water may be carried out in any known manner at the same time as carbon dioxide is recovered, or before or after the actual carbon dioxide recovery.
  • the water may be obtained from a carbon dioxide recovery unit, such as from a DAC (di rect air capture) unit or device. Any separation device which is known per se and by means of which water may be separated in connection with the carbon dioxide re covery may be used as the water separation device.
  • the process arrangement comprises at least one water separation device for separating water from the air, gas or liquid in connection with the carbon dioxide recovery.
  • the water e.g. fed water or recovered or sep arated water
  • the wa ter which is fed to the electrolysis may be obtained from any suitable raw material source, e.g. from a wa ter supply network, from a rain water system, from an exhaust air system, from a process water system or from another suitable source, and/or from the recovery or separation stage of this or another suitable process.
  • the water may be conducted to the electrolysis and electrolysis device by means of any suitable feeding device, wherein the feeding device used may be any suitable feeding device, e.g. a pump, pipe, other suitable feeding device or their combination.
  • supplementary water is con ducted, in addition to the water recovered in connec tion with the carbon dioxide recovery, to the electrol ysis for producing the oxygen and hydrogen.
  • water is separated in connection with the treatment of the carbon dioxide in the hydrocarbon syn thesis, and the separated water is conducted to the electrolysis.
  • water may be separated from the property's ventilation system air, and the separated water may be conducted as supplementary water to the electrolysis.
  • the supplementary water may be partly or fully or alternatively periodi cally obtained from any suitable raw material source, e.g. from a water supply network, from a rain water system or from an exhaust air system or from another suitable source.
  • the process ar rangement comprises at least one supplementary water feeding device for feeding the water to the electroly sis device.
  • oxygen and hydrogen are produced from the water.
  • Any suitable electrolysis de vice known in the art may be used as the electrolysis device for producing the oxygen and hydrogen.
  • Electricity is needed in the electrolysis, which electricity may be produced, e.g. in connection with energy production of the industrial process, or alternatively in a wind power device or in a solar cell device.
  • electricity is supplied to the electrolysis.
  • electricity is supplied from electricity production of the industrial process to the electrolysis.
  • the process arrangement comprises at least one electricity supply device for supplying the electricity to the electrolysis.
  • the oxygen produced in the electrolysis preferably pure oxygen, is recovered and conducted to an oxygen-requiring stage of the selected industrial process.
  • the hydrogen produced in the elec trolysis is conducted to the hydrocarbon synthesis for producing hydrocarbons.
  • the hydrogen is conducted to the hydrocarbon synthesis by means of a transfer de vice, wherein any suitable transfer or feeding device may be used as the transfer device, e.g. a hydrogen feeding device, an injector, a compressor, a pipe, an other suitable transfer device or their combination.
  • the recovered carbon dioxide is conducted to the hydrocarbon synthesis. From the carbon dioxide, hydro carbons, e.g. methane, are produced by means of the hy drogen.
  • carbon dioxide is recovered also from an exhaust gas of electricity production and the carbon dioxide recovered from the electricity pro duction is conducted to the hydrocarbon synthesis for treating the carbon dioxide and for producing the hy drocarbons.
  • the process arrangement comprises at least one other carbon dioxide recovery device for recovering the carbon dioxide from the ex haust gas of electricity production.
  • the carbon diox ide may be conducted from the carbon dioxide recovery devices to the hydrocarbon synthesis by means of any suitable feeding or transfer device, e.g. a carbon di oxide feeding device, a compressor, a pipe, another suitable feeding device or their combination.
  • a desired hydrocarbon or hydrocarbon mixture comprising more than one hydrocar bon is produced in the hydrocarbon synthesis.
  • hydrocarbons suitable as fuels are pro prised in the hydrocarbon synthesis.
  • mainly methane is produced in the hydrocarbon synthe- sis.
  • an alcohol-based compound or another oxygen-containing compound is produced in the hydrocarbon synthesis.
  • the treat ment of the carbon dioxide is done in the hydrocarbon synthesis by means of a chemical synthesis in the presence of a catalyst or without a catalyst.
  • any known device which is suit able for the purpose and in which the conditions, e.g. pressure and temperature, suitable for the synthesis are preferably arrangeable may be used.
  • the product produced in the hydrocarbon synthesis is recovered and/or provicd further.
  • the product or a suitable fraction separated from the product may be used as an end product or as a component in an end product, processed further into a desired compound or product, used as a feedstock in a desired process or as a fuel in combustion.
  • the industrial process is a pulp manufacturing process or a metal alloy manufac turing process.
  • the pulp manufacturing process may be any process or process stage relating to the manufac ture of pulp, such as the treatment of pulp, for exam ple oxygen delignification, bleaching using oxygen or oxygen and another chemical or another treatment in the manufacture of pulp, or treatment of waste water or an other process stage.
  • the metal alloy manufacturing pro cess may be a process or process stage relating to the manufacture of any metal alloy, e.g. steel, or any pro cess or process stage relating to the manufacture of a metal alloy which requires oxygen, e.g. decarburization in the manufacture of steel.
  • the produced oxygen is di rectly conducted to the industrial process.
  • the produced oxygen is stored temporarily and used after the temporary storage in the industrial process.
  • the oxygen is conducted directly or via temporary storage to a selected indus trial process.
  • the process arrange ment comprises at least one temporary storage device for temporarily storing the oxygen.
  • the process arrangement comprises at least one oxygen transfer device for conducting the oxygen to the se lected industrial process. Any suitable transfer or feeding device, e.g. an oxygen feeding device, an in jector, a compressor, a pipe, another suitable trans fer device or their combination, may be used as the transfer device.
  • heat generated in the electrolysis or hydrocarbon synthesis may be utilized in the carbon dioxide recovery stage or in the indus trial process or in a suitable process stage of the industrial process.
  • the method and process arrangement according to the invention may be used in the production of oxy gen, in the production of hydrogen, in the recovery of carbon dioxide, in the treatment of a property's air, in the manufacture of hydrocarbons, in the manufacture of pulp, in the manufacture of a metal alloy, in the production of energy, in the production of heat, in an energy production system and in their combinations.
  • pure oxygen may be produced for the needs of an industrial process simultaneously with the recovery and reduction of carbon dioxide.
  • oxygen may be ecologically pro prised in an industrial environment directly for indus trial needs.
  • carbon di oxide may be utilized, and hydrocarbons may be proucked from the carbon dioxide. Thereby the carbon di oxide loading in the atmosphere may be reduced.
  • the process arrangement according to the in vention may be implemented easily and cost efficient ly.
  • the process arrangement may be easily added in connection with existing industrial process es.
  • Fig. 1 illustrates one apparatus according to the invention.
  • the process arrangement of Fig. 1 comprises at least one carbon dioxide recovery device (2) for recovering carbon dioxide from air (1) in connection with an industrial process.
  • the recovery device (2) may be a DAC (direct air capture) device.
  • the process arrangement comprises at least one water sepa ration device for separating water from the air in connection with the carbon dioxide recovery (2).
  • the process arrangement comprises at least one electrolysis device (5) to which separated water (4) is conductable and in which oxygen (7) and hydro gen (6) are produced from the water (4), and at least one hydrocarbon synthesis device (8) in which hydro carbons (9) are produced from recovered carbon dioxide (3).
  • the process arrangement comprises at least one hydrogen transfer device for conducting the hydrogen (6) produced in the electrolysis to the hy- drocarbon synthesis device (8), and at least one oxy gen recovery device (not illustrated in the figure) for recovering the oxygen (7) produced in the electrolysis.
  • the oxygen (7) is conducted directly or via temporary storage to a selected industrial process, such as to the manufacture of pulp or a metal alloy, for example by means of a suitable oxygen transfer device.
  • the process arrangement may comprise at least one supplementary water feeding device for feeding supplementary water to the electrolysis device (5).
  • water may be separated in connection with the treatment of the carbon dioxide in the carbon dioxide synthesis (8) or from the property's ventila tion system air, and the separated water is conducted as supplementary water to the electrolysis (5).
  • supplementary water may be partly or fully or alternatively periodically obtained from any suitable raw material source, e.g. from a water supply network, from a rain water system or from an exhaust air system or from another suitable source.
  • the pro cess arrangement comprises at least one electricity supply device for supplying the electricity (10) to the electrolysis (5).
  • the process arrangement is pref erably in close connection with the electricity produc tion (11) of the industrial process.
  • Carbon dioxide (12) is also recovered from an exhaust gas of the elec tricity production, and the carbon dioxide (12) is con ducted from the electricity production to the hydrocar bon synthesis (8) for producing the hydrocarbons.
  • the process arrangement comprises at least one other car bon dioxide recovery device for recovering the carbon dioxide from the exhaust gas of the electricity pro duction.
  • Devices known per se may be used as the recov ery devices, the separation devices, the electrolysis devices and the hydrocarbon synthesis devices, and they are not described in any more detail in this connec- tion.
  • the method and process arrangement according to the invention are suitable as different embodiments to be used in the most different types of applications for recovering and utilizing carbon dioxide and at the same time for producing oxygen directly for the needs of an industrial process.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gas Separation By Absorption (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention relates to a method and process arrangement for the production of oxygen for an industrial process, wherein carbon dioxide (3) is recovered from air (1), gas or liquid in connection with an industrial process, water (4) is conducted to an electrolysis (5) which is provided in connection with the recovery or treatment of the carbon dioxide and in which oxygen (7) and hydrogen (6) are produced, the carbon dioxide is conducted to a hydrocarbon synthesis (8) for treating the carbon dioxide and for producing hydrocarbons (9), the hydrogen (6) produced in the electrolysis is conducted to the hydrocarbon synthesis (8), and the oxygen (7) produced in the electrolysis is recovered for a selected industrial process. In addition, the invention relates to the use of the method.

Description

METHOD AND PROCESS ARRANGEMENT FOR THE PRODUCTION OF OXYGEN FOR AN INDUSTRIAL PROCESS, AND USE OF THE METHOD
FIELD
The invention relates to the method defined in claim 1 and to the process arrangement defined in claim 10 for the production of oxygen for an industri al process, and to the use of the method as defined in claim 15.
BACKGROUND
Various methods for separating and recovering carbon dioxide from a gaseous stream or air are known in the prior art. In addition, document WO 2017/140954 discloses the recovery of carbon dioxide from air of a building.
OBJECT
An object of the invention is to disclose a new type of method and process arrangement for the production of oxygen for a desired industrial process. In addition, an object of the invention is to disclose a new type of arrangement for the production of oxygen in an environmentally-friendly and energy-efficient way. In addition, an object of the invention is to disclose a method and process arrangement for utiliz ing carbon dioxide and for reducing carbon dioxide emissions entering the atmosphere. In addition, an ob ject of the invention is to disclose an arrangement in which oxygen may be produced in connection with the recovery of carbon dioxide, while at the same time the carbon dioxide may be comprehensively utilized, where by carbon dioxide emissions into the atmosphere may be reduced. SUMMARY
The method and process arrangement for the production of oxygen and the use of the method accord- ing to the invention are characterized by the features disclosed in the claims.
In the method and process arrangement, oxygen is produced for an industrial process in connection with the recovery of carbon dioxide.
DETAILED DESCRIPTION
In the method for the production of oxygen for an industrial process according to the invention, carbon dioxide is recovered from air, gas or liquid in connection with an industrial process, e.g. a pulp manufacturing process or a metal alloy manufacturing process. Water is conducted to an electrolysis provid ed in connection with the recovery or treatment of the carbon dioxide, in which electrolysis oxygen and hy- drogen are produced. The carbon dioxide is conducted to a hydrocarbon synthesis for treating the carbon di oxide and for producing hydrocarbons, and the hydrogen produced in the electrolysis is conducted to the hy drocarbon synthesis. The oxygen produced in the elec- trolysis is recovered for a selected industrial pro cess, preferably by conducting the oxygen to the se lected industrial process.
The process arrangement for the production of oxygen for an industrial process comprises at least one carbon dioxide recovery device for recovering carbon dioxide from air, gas or liquid in connection with an industrial process, at least one electrolysis device provided in connection with the recovery or treatment of the carbon dioxide, to which electrolysis device wa- ter is conducted and in which electrolysis device oxy gen and hydrogen are produced from the water, at least one hydrocarbon synthesis device in which the recovered carbon dioxide is treated and hydrocarbons are produced from the recovered carbon dioxide, at least one hydro gen transfer device for conducting the hydrogen pro duced in the electrolysis to the hydrocarbon synthesis device, and at least one oxygen recovery device for re covering the oxygen produced in the electrolysis for a selected industrial process, and preferably by conduct ing the oxygen to the selected industrial process.
In one embodiment, carbon dioxide is recov ered from air, e.g. air being conducted to a property or building, air being circulated therein, air being removed therefrom or ambient air, such as outdoor air. In one embodiment, carbon dioxide is recovered from a gas, such as from exhaust gases, from a combustion gas and/or from a flue gas, e.g. from an energy production exhaust gas. In one embodiment, carbon dioxide is re covered from outdoor air, from air being conducted to a property, from air being circulated in a property and/or from a property's exhaust air. In one embodi ment, carbon dioxide is recovered from air, such as from outdoor air or from ambient air. In one embodi ment, carbon dioxide is recovered from a liquid which may be a mixture of a liquid and a gas or a liquid alone, e.g. process water or sea water.
In one embodiment, carbon dioxide is recovered from exhaust gases of a selected industrial process, such as the manufacture of pulp or a metal alloy, a se lected process or process stage, or from exhaust gases of a manufacturing process.
In this connection, a property refers to any property or building, wherein the property may com prise more than one building, e.g. an industrial prop erty, an industrial plant, a plant or line designated for the manufacture of a specific product or products, or another building complex.
Carbon dioxide may be recovered by means of any carbon dioxide recovery device which is suitable for the purpose. The recovery device may be any sepa ration or recovery device which is known per se and in which the separation of carbon dioxide from air, gas or liquid may be based on a chemical method, a physi cal method, an absorption method, a dissolution meth od, a membrane method, another suitable method or their combinations. In one embodiment, the carbon di oxide recovery device is a DAC (direct air capture) device.
In one embodiment, water is separated from the air, gas or liquid in connection with the carbon dioxide recovery, and the separated water is conducted to the electrolysis for producing the oxygen and hy drogen. In one embodiment, water is separated from air. In one embodiment, water is separated from a gas. In one embodiment, water is separated from a liquid. The separation of water may be carried out in any known manner at the same time as carbon dioxide is recovered, or before or after the actual carbon dioxide recovery. In one embodiment, the water may be obtained from a carbon dioxide recovery unit, such as from a DAC (di rect air capture) unit or device. Any separation device which is known per se and by means of which water may be separated in connection with the carbon dioxide re covery may be used as the water separation device. In one embodiment, the process arrangement comprises at least one water separation device for separating water from the air, gas or liquid in connection with the carbon dioxide recovery.
The water, e.g. fed water or recovered or sep arated water, is conducted to the electrolysis. The wa ter which is fed to the electrolysis may be obtained from any suitable raw material source, e.g. from a wa ter supply network, from a rain water system, from an exhaust air system, from a process water system or from another suitable source, and/or from the recovery or separation stage of this or another suitable process. The water may be conducted to the electrolysis and electrolysis device by means of any suitable feeding device, wherein the feeding device used may be any suitable feeding device, e.g. a pump, pipe, other suitable feeding device or their combination.
In one embodiment, supplementary water is con ducted, in addition to the water recovered in connec tion with the carbon dioxide recovery, to the electrol ysis for producing the oxygen and hydrogen. In one em bodiment, water is separated in connection with the treatment of the carbon dioxide in the hydrocarbon syn thesis, and the separated water is conducted to the electrolysis. In one embodiment, water may be separated from the property's ventilation system air, and the separated water may be conducted as supplementary water to the electrolysis. Alternatively, the supplementary water may be partly or fully or alternatively periodi cally obtained from any suitable raw material source, e.g. from a water supply network, from a rain water system or from an exhaust air system or from another suitable source. In one embodiment, the process ar rangement comprises at least one supplementary water feeding device for feeding the water to the electroly sis device.
In the electrolysis, oxygen and hydrogen are produced from the water. Any suitable electrolysis de vice known in the art may be used as the electrolysis device for producing the oxygen and hydrogen.
Electricity is needed in the electrolysis, which electricity may be produced, e.g. in connection with energy production of the industrial process, or alternatively in a wind power device or in a solar cell device. In one embodiment, electricity is supplied to the electrolysis. In one embodiment, electricity is supplied from electricity production of the industrial process to the electrolysis. In one embodiment, the process arrangement comprises at least one electricity supply device for supplying the electricity to the electrolysis.
The oxygen produced in the electrolysis, preferably pure oxygen, is recovered and conducted to an oxygen-requiring stage of the selected industrial process.
Preferably, the hydrogen produced in the elec trolysis is conducted to the hydrocarbon synthesis for producing hydrocarbons. The hydrogen is conducted to the hydrocarbon synthesis by means of a transfer de vice, wherein any suitable transfer or feeding device may be used as the transfer device, e.g. a hydrogen feeding device, an injector, a compressor, a pipe, an other suitable transfer device or their combination. Also the recovered carbon dioxide is conducted to the hydrocarbon synthesis. From the carbon dioxide, hydro carbons, e.g. methane, are produced by means of the hy drogen. In one embodiment, carbon dioxide is recovered also from an exhaust gas of electricity production and the carbon dioxide recovered from the electricity pro duction is conducted to the hydrocarbon synthesis for treating the carbon dioxide and for producing the hy drocarbons. In one embodiment, the process arrangement comprises at least one other carbon dioxide recovery device for recovering the carbon dioxide from the ex haust gas of electricity production. The carbon diox ide may be conducted from the carbon dioxide recovery devices to the hydrocarbon synthesis by means of any suitable feeding or transfer device, e.g. a carbon di oxide feeding device, a compressor, a pipe, another suitable feeding device or their combination.
In one embodiment, a desired hydrocarbon or hydrocarbon mixture comprising more than one hydrocar bon is produced in the hydrocarbon synthesis. In one embodiment, hydrocarbons suitable as fuels are pro duced in the hydrocarbon synthesis. In one embodiment, mainly methane is produced in the hydrocarbon synthe- sis. In one embodiment, an alcohol-based compound or another oxygen-containing compound is produced in the hydrocarbon synthesis. In one embodiment, the treat ment of the carbon dioxide is done in the hydrocarbon synthesis by means of a chemical synthesis in the presence of a catalyst or without a catalyst. In the hydrocarbon synthesis, any known device which is suit able for the purpose and in which the conditions, e.g. pressure and temperature, suitable for the synthesis are preferably arrangeable may be used.
In one embodiment, the product produced in the hydrocarbon synthesis is recovered and/or pro cessed further. In one embodiment, the product or a suitable fraction separated from the product may be used as an end product or as a component in an end product, processed further into a desired compound or product, used as a feedstock in a desired process or as a fuel in combustion.
In one embodiment, the industrial process is a pulp manufacturing process or a metal alloy manufac turing process. The pulp manufacturing process may be any process or process stage relating to the manufac ture of pulp, such as the treatment of pulp, for exam ple oxygen delignification, bleaching using oxygen or oxygen and another chemical or another treatment in the manufacture of pulp, or treatment of waste water or an other process stage. The metal alloy manufacturing pro cess may be a process or process stage relating to the manufacture of any metal alloy, e.g. steel, or any pro cess or process stage relating to the manufacture of a metal alloy which requires oxygen, e.g. decarburization in the manufacture of steel.
In one embodiment, the produced oxygen is di rectly conducted to the industrial process. In one em bodiment, the produced oxygen is stored temporarily and used after the temporary storage in the industrial process. In one embodiment, the oxygen is conducted directly or via temporary storage to a selected indus trial process. In one embodiment, the process arrange ment comprises at least one temporary storage device for temporarily storing the oxygen. In one embodiment, the process arrangement comprises at least one oxygen transfer device for conducting the oxygen to the se lected industrial process. Any suitable transfer or feeding device, e.g. an oxygen feeding device, an in jector, a compressor, a pipe, another suitable trans fer device or their combination, may be used as the transfer device.
In one embodiment, heat generated in the electrolysis or hydrocarbon synthesis may be utilized in the carbon dioxide recovery stage or in the indus trial process or in a suitable process stage of the industrial process.
The method and process arrangement according to the invention may be used in the production of oxy gen, in the production of hydrogen, in the recovery of carbon dioxide, in the treatment of a property's air, in the manufacture of hydrocarbons, in the manufacture of pulp, in the manufacture of a metal alloy, in the production of energy, in the production of heat, in an energy production system and in their combinations.
In the method and process arrangement accord ing to the invention, pure oxygen may be produced for the needs of an industrial process simultaneously with the recovery and reduction of carbon dioxide. Accord ing to the invention, oxygen may be ecologically pro duced in an industrial environment directly for indus trial needs. In addition, at the same time carbon di oxide may be utilized, and hydrocarbons may be pro duced from the carbon dioxide. Thereby the carbon di oxide loading in the atmosphere may be reduced.
The process arrangement according to the in vention may be implemented easily and cost efficient ly. In addition, the process arrangement may be easily added in connection with existing industrial process es.
LIST OF FIGURES
Fig. 1 illustrates one apparatus according to the invention.
EXAMPLES
The invention is described below by means of a detailed example of an embodiment with reference to the accompanying figure.
Example 1
In this example, carbon dioxide is recovered mainly from air, and at the same time oxygen is pro duced for an industrial process, such as a pulp manu facturing process or a metal alloy manufacturing pro cess, by means of a process arrangement according to Fig. 1. The process arrangement is illustrated in Fig. 1 as a simplified example.
The process arrangement of Fig. 1 comprises at least one carbon dioxide recovery device (2) for recovering carbon dioxide from air (1) in connection with an industrial process. The recovery device (2) may be a DAC (direct air capture) device. Further, the process arrangement comprises at least one water sepa ration device for separating water from the air in connection with the carbon dioxide recovery (2). In addition, the process arrangement comprises at least one electrolysis device (5) to which separated water (4) is conductable and in which oxygen (7) and hydro gen (6) are produced from the water (4), and at least one hydrocarbon synthesis device (8) in which hydro carbons (9) are produced from recovered carbon dioxide (3). In addition, the process arrangement comprises at least one hydrogen transfer device for conducting the hydrogen (6) produced in the electrolysis to the hy- drocarbon synthesis device (8), and at least one oxy gen recovery device (not illustrated in the figure) for recovering the oxygen (7) produced in the electrolysis. The oxygen (7) is conducted directly or via temporary storage to a selected industrial process, such as to the manufacture of pulp or a metal alloy, for example by means of a suitable oxygen transfer device.
The process arrangement may comprise at least one supplementary water feeding device for feeding supplementary water to the electrolysis device (5). In one embodiment, water may be separated in connection with the treatment of the carbon dioxide in the carbon dioxide synthesis (8) or from the property's ventila tion system air, and the separated water is conducted as supplementary water to the electrolysis (5). Alter natively, supplementary water may be partly or fully or alternatively periodically obtained from any suitable raw material source, e.g. from a water supply network, from a rain water system or from an exhaust air system or from another suitable source.
In the process arrangement, electricity (10) is supplied from electricity production (11) of the industrial process to the electrolysis (5). The pro cess arrangement comprises at least one electricity supply device for supplying the electricity (10) to the electrolysis (5). The process arrangement is pref erably in close connection with the electricity produc tion (11) of the industrial process. Carbon dioxide (12) is also recovered from an exhaust gas of the elec tricity production, and the carbon dioxide (12) is con ducted from the electricity production to the hydrocar bon synthesis (8) for producing the hydrocarbons. The process arrangement comprises at least one other car bon dioxide recovery device for recovering the carbon dioxide from the exhaust gas of the electricity pro duction. Devices known per se may be used as the recov ery devices, the separation devices, the electrolysis devices and the hydrocarbon synthesis devices, and they are not described in any more detail in this connec- tion.
The method and process arrangement according to the invention are suitable as different embodiments to be used in the most different types of applications for recovering and utilizing carbon dioxide and at the same time for producing oxygen directly for the needs of an industrial process.
The invention is not limited only to the above-described examples, but many modifications are possible within the scope of the inventive idea de fined by the claims.

Claims

1. A method for the production of oxygen for an industrial process, characterized in that
- carbon dioxide is recovered from air, gas or liquid in connection with an industrial pro cess,
- water is conducted to an electrolysis which is provided in connection with the recovery or treatment of the carbon dioxide and in which oxygen and hydrogen are produced,
- the carbon dioxide is conducted to a hydro carbon synthesis for treating the carbon dioxide and for producing hydrocarbons,
- the hydrogen produced in the electrolysis is conducted to the hydrocarbon synthesis, and the oxygen produced in the electrolysis is recovered for a selected industrial process.
2. The method according to claim 1, char acterized in that the industrial process is a pulp manufacturing process or a metal alloy manufactur ing process.
3. The method according to claim 1 or 2, characterized in that water is separated from the air, gas or liquid in connection with the carbon dioxide recovery, and the separated water is conducted to the electrolysis for the production of oxygen and hydrogen.
4. The method according to any one of claims 1 - 3, characterized in that water is separat ed in connection with the treatment of the carbon diox ide in the hydrocarbon synthesis, and the separated wa ter is conducted to the electrolysis.
5. The method according to any one of claims 1 - 4, characterized in that carbon dioxide is recovered from air.
6. The method according to any one of claims 1
- 5, characterized in that carbon dioxide is recovered from outdoor air, from air conducted to a property, from air circulated in a property and/or from a property's exhaust air.
7. The method according to any one of claims 1
- 6, characterized in that electricity is supplied to the electrolysis.
8. The method according to any one of claims 1 - 7, characterized in that electricity is sup plied to the electrolysis from electricity production of the industrial process.
9. The method according to any one of claims 1 - 8, characterized in that carbon dioxide is recovered from an exhaust gas of the electricity pro duction and the carbon dioxide is conducted to the hy drocarbon synthesis for the production of hydrocarbons.
10. A process arrangement for the production of oxygen for an industrial process, character ized in that the process arrangement comprises
- at least one carbon dioxide recovery device
(2) for recovering carbon dioxide (3) from air (1), gas or liquid in connection with an industrial process,
- at least one electrolysis device (5) pro vided in connection with the recovery or treatment of the carbon oxide, to which electrolysis device water (4) is conducted and in which electrolysis device oxygen (7) and hydrogen (6) are produced from the wa ter,
- at least one hydrocarbon synthesis device (8) in which the recovered carbon dioxide
(3) is treated and hydrocarbons are pro duced from the carbon dioxide,
- at least one hydrogen transfer device for conducting the hydrogen (6) produced in the electrolysis (5) to the hydrocarbon synthe sis device (8), and
- at least one oxygen recovery device for re covering the oxygen (7) produced in the electrolysis for a selected industrial pro cess.
11. The process arrangement according to claim 10, characterized in that the process ar rangement comprises at least one temporary storage de vice for temporarily storing the oxygen (7).
12. The process arrangement according to claim 10 or 11, characterized in that the process arrangement comprises at least one water separation de vice for separating the water (4) from the air, gas or liquid in connection with the carbon dioxide recovery (2).
13. The process arrangement according to any one of claims 10 - 12, characterized in that the process arrangement comprises at least one elec tricity supply device for supplying electricity (10) to the electrolysis (5).
14. The process arrangement according to any one of claims 10 - 13, characterized in that the process arrangement comprises at least one other carbon dioxide recovery device for recovering carbon dioxide (12) from exhaust gases of electricity produc tion.
15. Use of the method according to any one of claims 1 - 9, characterized in that the meth od is used in the production of oxygen, in the produc tion of hydrogen, in the recovery of carbon dioxide, in the treatment of a property's air, in the manufac ture of hydrocarbons, in the manufacture of pulp, in the manufacture of a metal alloy, in the production of energy, in the production of heat, in an energy pro duction system and in their combinations.
PCT/FI2020/050576 2019-09-09 2020-09-09 Method and process arrangement for the production of oxygen for industrial process, and use of the method WO2021048467A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2977089A1 (en) * 2011-06-17 2012-12-28 Laurent Jean Serge Zibell Storing and restoring the electrical energy e.g. wind energy, where the function of storing electrical energy is carried out by water electrolysis step, methanation step and reacting hydrogen obtained from electrolysis with carbon dioxide
US20150232999A1 (en) * 2012-09-11 2015-08-20 Siemens Aktiengesellschaft Environmentally-friendly integrated installation for producing chemical and petrochemical products
US20160017800A1 (en) * 2012-02-20 2016-01-21 Thermogas Dynamics Limited Methods and systems for energy conversion and generation
US20170283724A1 (en) * 2014-09-01 2017-10-05 Mitsubishi Hitachi Power Systems Europe Gmbh Industrial Production Plant Having Minimal Emission of Greenhouse Gases, in Particular Emission of Carbon Dioxide, and Method for the Operation Thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2977089A1 (en) * 2011-06-17 2012-12-28 Laurent Jean Serge Zibell Storing and restoring the electrical energy e.g. wind energy, where the function of storing electrical energy is carried out by water electrolysis step, methanation step and reacting hydrogen obtained from electrolysis with carbon dioxide
US20160017800A1 (en) * 2012-02-20 2016-01-21 Thermogas Dynamics Limited Methods and systems for energy conversion and generation
US20150232999A1 (en) * 2012-09-11 2015-08-20 Siemens Aktiengesellschaft Environmentally-friendly integrated installation for producing chemical and petrochemical products
US20170283724A1 (en) * 2014-09-01 2017-10-05 Mitsubishi Hitachi Power Systems Europe Gmbh Industrial Production Plant Having Minimal Emission of Greenhouse Gases, in Particular Emission of Carbon Dioxide, and Method for the Operation Thereof

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