WO2011049275A1 - Traitement de solution solide de co2, et procédé d'adsorption des métaux lourds au moyen de déchets de ciment - Google Patents

Traitement de solution solide de co2, et procédé d'adsorption des métaux lourds au moyen de déchets de ciment Download PDF

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Publication number
WO2011049275A1
WO2011049275A1 PCT/KR2010/000735 KR2010000735W WO2011049275A1 WO 2011049275 A1 WO2011049275 A1 WO 2011049275A1 KR 2010000735 W KR2010000735 W KR 2010000735W WO 2011049275 A1 WO2011049275 A1 WO 2011049275A1
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WIPO (PCT)
Prior art keywords
waste
cement
fine powder
waste cement
gas
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PCT/KR2010/000735
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English (en)
Korean (ko)
Inventor
유광석
안지환
김형석
한기천
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한국지질자원연구원
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Publication of WO2011049275A1 publication Critical patent/WO2011049275A1/fr

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    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • 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
    • B01D53/64—Heavy metals or compounds thereof, e.g. mercury
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041—Oxides or hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/50—Carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/16—Waste materials; Refuse from building or ceramic industry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0233—Other waste gases from cement factories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
    • B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to a method of solidifying CO 2 gas by using waste cement and adsorbing heavy metals.
  • Waste concrete is composed of 55% of coarse aggregate, 28% of sand, and 17% of cement based on weight.
  • Carbon dioxide storage methods known to date include carbon dioxide storage underground and marine discharge methods.
  • underground storage it is expected to take several years for practical use as it is considering the domestic strata structure for underground storage.
  • marine emissions the rise of seawater concentrations of CO 2 gas is expected to destroy marine ecosystems, and marine emissions are also subject to many restrictions. Therefore, there is a need for a new method of storing CO2 different from the existing method.
  • heavy metals such as various wastewater have a bad effect on not only animals and plants but also humans.
  • methods used for removing heavy metals include precipitation of hydroxides or sulfides, ion exchange methods, etc., but are expensive or produce harmful by-products.
  • the object is to prepare a waste cement fine powder; Solidifying CO 2 in the waste cement fine powder; CO 2 can be achieved by a method comprising adsorbing heavy metals to a solid cemented solid powder.
  • Figure 2 is a graph showing the CO 2 carbonation rate of the fine cement powder according to the CO 2 carbonation method.
  • Figure 3 is a scanning micrograph of the finely hydrated cement fine powder and the fine cement powder according to the CO 2 carbonation method.
  • Figure 6 is a CO 2 carbonated waste cement fine powder surface EDX photograph with Pb ions adsorbed.
  • Lung cement powder is four hydraulic mineral Alite (3CaO ⁇ SiO 2) and, Belite (3CaO ⁇ SiO 2) , Tricalium aluminte (3CaO ⁇ Al 2 O 3), Ferrite (4CaO ⁇ Al 2 O 3 ⁇ Fe 2 O 3 ) Minerals and various hydrates produced by the reaction of these minerals with water molecules. Generally, the hydrates present in the waste concrete waste cement fine powder are produced by the hydration reaction of the four major minerals.
  • Alite mineral (3CaO ⁇ SiO 2 ): It is a mineral that occupies 45-50% of the 1 Ordinary Portland Cement mineral, and forms calcium hydroxide and calcium silicate hydrate by hydration with water. Let's do it.
  • Belite mineral (2CaO ⁇ SiO 2 ) It is a mineral that accounts for 25-30% of the minerals of Ordinary Portland Cement, and forms calcium hydroxide and calcium silicate hydrate by hydration with water. Let's do it.
  • 3Tricalium aluminte-based mineral (3CaO ⁇ Al 2 O 3 ): It is a mineral that accounts for 10-11% of the minerals of Ordinary Portland Cement. It is a hydrate of water, and Hydrogarnet and Ettringite are hydrated. Create
  • Ferrite mineral (4CaO ⁇ Al 2 O 3 ⁇ Fe 2 O 3 ): It is a mineral that accounts for 8-9% of the minerals of the Ordinary Portland Cement. It is hydrated with Hydrogarnet through hydration with water. Ettringite is produced as a hydrate.
  • the cement cement powder consists of four unreacted cement minerals and a hydrate produced by reacting these minerals with water molecules.
  • CO 2 gas is composed of Alite mineral (3CaO ⁇ SiO 2 ), Belite (2CaO ⁇ SiO 2 ) and Tricalium aluminte mineral (3CaO ⁇ Al 2 O 3 ) among some unreacted cement minerals which constitute fine cement waste cement powder.
  • Alite mineral (3CaO ⁇ SiO 2 )
  • Tricalium aluminte mineral (3CaO ⁇ Al 2 O 3 ) among some unreacted cement minerals which constitute fine cement waste cement powder.
  • the following shows a reaction mechanism in which unreacted cement minerals and CO 2 react among the components of the waste cement fine powder to stably fix CO 2 .
  • the following shows a reaction mechanism in which hydrate and CO 2 in the components of the waste concrete fine cement powder are reacted to stably fix CO 2 .
  • components that make up the waste concrete cement waste fine powder may be employed to screen CO 2 gas stably by generating the CaCO 3 reacted with CO 2 gas.
  • the method for obtaining waste cement fine powder from waste concrete is as follows.
  • the method for obtaining the waste cement fine powder in the present invention is not limited to the following method.
  • the waste concrete is crushed with a jaw crusher to separate scrap metal through magnetic screening, and fine particles are separated using a blower.
  • the fine cement powder can be obtained by removing the coarse aggregate remaining after the second crushing using a condenser again.
  • the diameter of the waste cement fine powder is not limited thereto, but is preferably 100 ⁇ m or less.
  • the sand in the waste cement fine powder may be removed using an interference sedimentation method.
  • the fixed amount of CO 2 gas increases with the carbonation time and is fixed up to about 20% by weight ratio of the waste cement fine powder.
  • Reactors used for wet carbonation can be both open and closed, with the exception of stirring to maintain the slurry.
  • CO 2 gas is introduced into the reactor using a bubbler.
  • the fixed amount of CO 2 gas increases with the time of carbonation and is fixed to about 30% by weight ratio of the waste cement fine powder.
  • CO 2 gas is solidified by CaO component of waste cement fine powder.
  • the Si component is separated and exists in a SiO 2 state, where SiO 2 has a three-dimensional structure of a mesh structure and has a highly adsorptive silica gel state. It exists.
  • the Si component contains about 20 ⁇ 25% of the constituent elements of the waste concrete waste cement fine powder after CaO, which plays a decisive role in imparting the adsorption characteristics of carbonated waste cement fine powder.
  • Figure 1 is an X-ray diffraction pattern showing the change in the mineral phase of the fine cement powder with the dry cementation time using the waste cement fine powder and CO 2 gas.
  • cement hydrate reacts with CO 2 to produce CaCO 3 .
  • Figure 2 shows the fixed amount of CO 2 according to dry and wet carbonation mentioned in the present invention.
  • FIG. 3 is a scanning electron micrograph of the surface of the cement particles hydrated under the same conditions as the fine cement powder and the surface of the cement particles reacted with CO 2 according to the carbonation method. On the surface of the hydrated cement particles, needle-like hydrates and amorphous hydrates were observed. These hydrates produced ettringite and calcium silicate hydrates. Hexagonal calcium carbonate was observed on the surface of cement particles reacted with CO 2, and these products were identified as calcium carbonate by X-ray diffraction analysis.
  • Figure 4 shows (1) cement fine powder before reaction with water, (2) fine cement powder hydrated with water, (3) fine cement powder carbonated with CO 2 gas after hydration, and (4) fine powder of carbonated waste cement. 29 NMR spectrum is shown.
  • Pyrolysis occurs at 700 ⁇ 800 °C for CaCO 3 formed by reacting with Ca component and CO 2 gas constituting fine cement powder.
  • CaCO 3 formed by reacting with Ca component and CO 2 gas constituting fine cement powder.
  • FIG. 6 is an EDX analysis photograph of the surface analysis of the waste cement fine powder obtained through solid-liquid separation after the experiment of heavy metal adsorption by adding the waste cement fine powder carbonated by CO 2 gas to the water containing Pb 3+ .
  • a method of stably dissolving CO 2 and adsorbing heavy metals is provided.
  • the effective use of national waste resources and the effect of improving the environment can be simultaneously achieved.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Civil Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)

Abstract

La présente invention concerne un traitement de solution solide de CO2 et un procédé d'adsorption de métaux lourds utilisant de la poudre de déchets de ciment et de déchets de béton. Ce procédé consiste: à préparer de la poudre de déchets de ciment; à former une solution solide de CO2 sur la poudre de déchets de ciment; et à adsorber les métaux lourds sur la poudre de déchets de ciment dans laquelle le CO2 est en solution solide. Le procédé de l'invention permet ainsi de mettre le CO2 de façon stable en solution solide, des métaux lourds étant adsorbés grâce à l'utilisation de déchets de ciment.
PCT/KR2010/000735 2009-10-20 2010-02-05 Traitement de solution solide de co2, et procédé d'adsorption des métaux lourds au moyen de déchets de ciment WO2011049275A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090099806A KR101210357B1 (ko) 2009-10-20 2009-10-20 Co2 고용화 폐시멘트를 이용한 오염물질 내의 중금속 흡착방법
KR10-2009-0099806 2009-10-20

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WO2011049275A1 true WO2011049275A1 (fr) 2011-04-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023170203A1 (fr) * 2022-03-10 2023-09-14 Heidelberg Materials Ag Élimination de métaux lourds d'un dégagement gazeux pour la capture de carbone

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102136928B1 (ko) * 2018-07-30 2020-07-22 인천대학교 산학협력단 방사성핵종 흡착제의 제조 방법, 및 그 제조 방법으로 제조된 방사성핵종 흡착제를 포함하는 방사성 폐기물 처리 장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09168775A (ja) * 1995-12-19 1997-06-30 Yasuo Arai コンクリート廃材の資源化処理方法
JP2004074100A (ja) * 2002-08-22 2004-03-11 Kobe Steel Ltd 焼却灰の処理方法
KR100554715B1 (ko) * 2003-04-04 2006-02-24 한국지질자원연구원 폐콘크리트 미분말을 이용한 포틀랜드 시멘트 클링커 제조방법
KR100878665B1 (ko) * 2002-08-30 2009-01-13 주식회사 포스코 폐콘크리트를 이용한 유해 폐기물 고화용 시멘트 제조방법및 이로부터 제조된 시멘트

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE523248T1 (de) 2007-03-21 2011-09-15 Omya Development Ag Oberflächenbehandeltes calciumcarbonat und dessen verwendung zur abwasserbehandlung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09168775A (ja) * 1995-12-19 1997-06-30 Yasuo Arai コンクリート廃材の資源化処理方法
JP2004074100A (ja) * 2002-08-22 2004-03-11 Kobe Steel Ltd 焼却灰の処理方法
KR100878665B1 (ko) * 2002-08-30 2009-01-13 주식회사 포스코 폐콘크리트를 이용한 유해 폐기물 고화용 시멘트 제조방법및 이로부터 제조된 시멘트
KR100554715B1 (ko) * 2003-04-04 2006-02-24 한국지질자원연구원 폐콘크리트 미분말을 이용한 포틀랜드 시멘트 클링커 제조방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023170203A1 (fr) * 2022-03-10 2023-09-14 Heidelberg Materials Ag Élimination de métaux lourds d'un dégagement gazeux pour la capture de carbone

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KR101210357B1 (ko) 2012-12-10

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