A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD OF IMMOBILIZING CARBON DIOXIDE AND HARDENED CEMENT BODY
To provide a method for immobilizing carbon dioxide, capable of sufficiently immobilizing carbon dioxide in a cement hardened body even at a relatively low temperature.SOLUTION: A method for immobilizing carbon dioxide includes: a pretreatment step of adjusting the moisture content of a cement hardened body (A) to obtain a cement hardened body (B) having a moisture content W of 10 to 70%, as calculated by formulas (1) to (3); and a carbonation step of contacting the hardened cement body (B) with carbon dioxide under a pressure of 9 MPa or less and a temperature of 60°C or less to obtain a cement hardened body (C) in which carbon dioxide is immobilized. (1) W=100-Δw2/Δw1×100; (2) Δw1=(WA-WD)/WA×100; (3) Δw2=(WA-WB)/WA×100 [In the formulae (1)-(3), WA and WB are the weights of the cement hardened bodies (A) and (B), respectively; and WD is the weight of the cement hardened body (A) when it is dried at 105°C under atmospheric pressure until it reaches a constant weight].SELECTED DRAWING: None
【課題】比較的低い温度でも二酸化炭素をセメント硬化体に十分に固定化できる二酸化炭素の固定化方法を提供すること。【解決手段】セメント硬化体（Ａ）の水分量を調整して、式（１）～（３）で算出される水分量Ｗが１０～７０％であるセメント硬化体（Ｂ）を得る前処理工程と、圧力９ＭＰａ以下及び温度６０℃以下の条件下、セメント硬化体（Ｂ）と二酸化炭素とを接触させて、二酸化炭素が固定されたセメント硬化体（Ｃ）を得る炭酸化工程と、を有する、二酸化炭素の固定化方法。Ｗ＝１００－Δｗ２／Δｗ１×１００ （１）Δｗ１＝（ＷＡ－ＷＤ）／ＷＡ×１００ （２）Δｗ２＝（ＷＡ－ＷＢ）／ＷＡ×１００ （３）［式（１）～（３）中、ＷＡ及びＷＢはセメント硬化体（Ａ），（Ｂ）の重量をそれぞれ示し、ＷＤは、セメント硬化体（Ａ）を大気圧下において１０５℃で恒量になるまで乾燥させたときの重量を示す。］【選択図】なし
METHOD OF IMMOBILIZING CARBON DIOXIDE AND HARDENED CEMENT BODY
To provide a method for immobilizing carbon dioxide, capable of sufficiently immobilizing carbon dioxide in a cement hardened body even at a relatively low temperature.SOLUTION: A method for immobilizing carbon dioxide includes: a pretreatment step of adjusting the moisture content of a cement hardened body (A) to obtain a cement hardened body (B) having a moisture content W of 10 to 70%, as calculated by formulas (1) to (3); and a carbonation step of contacting the hardened cement body (B) with carbon dioxide under a pressure of 9 MPa or less and a temperature of 60°C or less to obtain a cement hardened body (C) in which carbon dioxide is immobilized. (1) W=100-Δw2/Δw1×100; (2) Δw1=(WA-WD)/WA×100; (3) Δw2=(WA-WB)/WA×100 [In the formulae (1)-(3), WA and WB are the weights of the cement hardened bodies (A) and (B), respectively; and WD is the weight of the cement hardened body (A) when it is dried at 105°C under atmospheric pressure until it reaches a constant weight].SELECTED DRAWING: None
【課題】比較的低い温度でも二酸化炭素をセメント硬化体に十分に固定化できる二酸化炭素の固定化方法を提供すること。【解決手段】セメント硬化体（Ａ）の水分量を調整して、式（１）～（３）で算出される水分量Ｗが１０～７０％であるセメント硬化体（Ｂ）を得る前処理工程と、圧力９ＭＰａ以下及び温度６０℃以下の条件下、セメント硬化体（Ｂ）と二酸化炭素とを接触させて、二酸化炭素が固定されたセメント硬化体（Ｃ）を得る炭酸化工程と、を有する、二酸化炭素の固定化方法。Ｗ＝１００－Δｗ２／Δｗ１×１００ （１）Δｗ１＝（ＷＡ－ＷＤ）／ＷＡ×１００ （２）Δｗ２＝（ＷＡ－ＷＢ）／ＷＡ×１００ （３）［式（１）～（３）中、ＷＡ及びＷＢはセメント硬化体（Ａ），（Ｂ）の重量をそれぞれ示し、ＷＤは、セメント硬化体（Ａ）を大気圧下において１０５℃で恒量になるまで乾燥させたときの重量を示す。］【選択図】なし
METHOD OF IMMOBILIZING CARBON DIOXIDE AND HARDENED CEMENT BODY
二酸化炭素の固定化方法、及びセメント硬化体
KURASHIGE ISAO (author) / HAMANAKA MARI (author) / TAKAHASHI KEISUKE (author)
2024-09-05
Patent
Electronic Resource
Japanese
| European Patent Office | 2024
CARBON DIOXIDE STORAGE METHOD AND CEMENT-BASED HARDENED BODY
| European Patent Office | 2021
| European Patent Office | 2025
CEMENT HARDENED BODY PRODUCTION METHOD AND CEMENT HARDENED BODY
| European Patent Office | 2024