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US-2024359132-A1 · Oct 31, 2024 · US
Carbon dioxide fixation method
US2022126237A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022126237-A1 |
| Application number | US-201917429966-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 2, 2019 |
| Priority date | Feb 14, 2019 |
| Publication date | Apr 28, 2022 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
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Provided is a simple and low-cost method for efficiently fixing a sufficient amount of carbon dioxide contained in a carbon dioxide-containing gas (e.g. a plant exhaust gas). The method of fixing carbon dioxide comprises a contact step of bringing a carbon dioxide-containing gas having a temperature of 350° C. or more into contact with a cementitious hardened body to fix carbon dioxide in the carbon dioxide-containing gas to the cementitious hardened body. The carbon dioxide-containing gas may be a gas that is free from being supplied with moisture before the contact step and during the contact step. One of examples of the carbon dioxide-containing gas is a plant exhaust gas.
First claim
Opening claim text (preview).
1 . A method of fixing carbon dioxide, comprising a contact step of bringing a carbon dioxide-containing gas having a temperature of 350° C. or more into contact with a cementitious hardened body to fix carbon dioxide in the carbon dioxide-containing gas to the cementitious hardened body. 2 . The method of fixing carbon dioxide according to claim 1 , wherein moisture is not supplied to the carbon dioxide-containing gas before the contact step and during the contact step. 3 . The method of fixing carbon dioxide according to claim 1 , wherein the carbon dioxide-containing gas comprises a carbon dioxide gas at a ratio of 5% or more as a volume fraction value. 4 . The method of fixing carbon dioxide according to claim 1 , wherein the carbon dioxide-containing gas is a plant exhaust gas. 5 . The method of fixing carbon dioxide according to claim 1 , wherein the cementitious hardened body is a recycled aggregate, a waste material of a building material formed of concrete or mortar, a waste material of a cement paste hardened body, or sludge produced in using ready-mixed concrete. 6 . The method of fixing carbon dioxide according to claim 1 , wherein the temperature of the carbon dioxide-containing gas in the contact step is from 350° C. to 500° C. 7 . The method of fixing carbon dioxide according to claim 1 , wherein the cementitious hardened body has a form of grain having a grain size of 50 mm or less. 8 . The method of fixing carbon dioxide according to claim 1 , wherein the carbon dioxide-containing gas has a ratio of water vapor of 0% as a volume fraction value.
Assignees
Inventors
Classifications
Carbon dioxide post-treatment of already hardened material · CPC title
Recycled materials, i.e. waste materials reused in the production of the same materials · CPC title
Destroying solid waste or transforming solid waste into something useful or harmless · CPC title
of CO2 · CPC title
Solid phase processes · CPC title
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- What does patent US2022126237A1 cover?
- Provided is a simple and low-cost method for efficiently fixing a sufficient amount of carbon dioxide contained in a carbon dioxide-containing gas (e.g. a plant exhaust gas). The method of fixing carbon dioxide comprises a contact step of bringing a carbon dioxide-containing gas having a temperature of 350° C. or more into contact with a cementitious hardened body to fix carbon dioxide in the c…
- Who is the assignee on this patent?
- Taiheiyo Cement Corp, Univ Tokyo
- What technology area does this patent fall under?
- Primary CPC classification B01D53/1475. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Apr 28 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).