Preparation method of supplementary cementitious material based on electrostatic adsorption for high-efficiency co2 sequestration

Patent metadata

Field	Value
Publication number	US-2025223223-A1
Application number	US-202519008979-A
Country	US
Kind code	A1
Filing date	Jan 3, 2025
Priority date	Jan 8, 2024
Publication date	Jul 10, 2025
Grant date	—

Abstract

A preparation method of a supplementary cementitious material based on electrostatic adsorption for high-efficiency CO2 sequestration is provided. The preparation method of the present disclosure includes the following steps: placing ultrafine carbide slag powder into an electrostatic field to make the ultrafine carbide slag powder have electrostatic charge, and obtaining ultrafine carbide slag powder with electrostatic charge; and uniformly mixing low-calcium fly ash and the ultrafine calcium carbide slag powder with electrostatic charge, followed by adding into a rotary packed bed; continuously introducing industrial waste gas containing CO2 and water vapor into the rotary packed bed; after a reaction, collecting a material and drying to obtain the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO2 sequestration.

First claim

What is claimed is:

1 . A preparation method of a supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration, comprising steps of:
(1), placing ultrafine carbide slag powder into an electrostatic field to make the ultrafine carbide slag powder have electrostatic charge, and obtaining ultrafine carbide slag powder with electrostatic charge; and (2), uniformly mixing low-calcium fly ash and the ultrafine calcium carbide slag powder with electrostatic charge, followed by adding into a rotary packed bed; continuously introducing industrial waste gas containing CO 2 and water vapor into the rotary packed bed; after a reaction, collecting a material and drying to obtain the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration.

2 . The preparation method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 1 , wherein a step (1) comprises one or more of following conditions:
i: a particle size of the ultrafine carbide slag powder is 1000-2500 meshes; and the ultrafine carbide slag powder is prepared by drying and grinding carbide slag; ii: the ultrafine carbide slag powder comprises following components in parts by mass: 86.26-89.21 parts of CaO, 3.12-5.41 parts of SiO 2 , 4.01-6.75 parts of SO 3 , 1.39-2.27 parts of Al 2 O 3 and 0.21-1.97 parts of MgO.

3 . The preparation method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 1 , wherein in a step (2), a particle size of the low-calcium fly ash is 150-500 meshes.

4 . The preparation method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 1 , wherein in the step (2), the low-calcium fly ash comprises following components in parts by mass: 2.32-3.76 parts of CaO, 44.01-57.89 parts of SiO 2 , 23.24-31.34 parts of Fe 2 O 3 , 2.27-5.15 parts of Fe 2 O 3 and 0.63-3.97 parts of MgO.

5 . The preparation method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 1 , wherein in the step (2), a mass ratio of the low-calcium fly ash to the ultrafine carbide slag powder with electrostatic charge is 60-90:10-30.

6 . The preparation method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 1 , wherein in the step (2), a continuous flow rate of industrial waste gas containing CO 2 and water vapor is 3-5 L/min.

7 . The preparation method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 1 , wherein in the step (2), the industrial waste gas containing CO 2 and water vapor comprises following components in percentage by volume: 9-10% of water vapor, 25-26% of CO 2 and 60-61% of nitrogen; wherein the industrial waste gas containing CO 2 and water vapor comprises following components in percentage by volume: 9.6% of water vapor, 25.4% of CO 2 and 60.5% of nitrogen.

8 . The preparation method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 1 , wherein in the step (2), a reaction duration is 5-15 min; a rotating speed of the rotary packed bed is 300-500 r/min; a temperature of the rotary packed bed is 20-30° C. and a pressure is 0.05-0.5 MPa.

9 . A supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration prepared by the preparation method according to claim 1 .

10 . A use method of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration according to claim 9 , comprising following steps:
compounding the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration with cement, followed by applying in concrete and mortar; wherein a mass ratio of the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO 2 sequestration to cement is 20-40:60-80.

Assignees

• Univ Shandong

Inventors

• Zhang Hongzhi
• Men Jiahui
• Ge Zhi
• Zhou Shengya
• Feng Yujie
• Zhang Hanming
• Xue Xingjie

Classifications

• C04B7/12

  Natural pozzuolanas; Natural pozzuolana cements; {Artificial pozzuolanas or artificial pozzuolana cements other than those obtained from waste or combustion residues, e.g. burned clay; Treating inorganic materials to improve their pozzuolanic characteristics (cements containing slag C04B7/14)} · CPC title

• C04B2111/00019

  Carbon dioxide sequestration · CPC title

• C04B20/0232

  with carbon dioxide · CPC title

• C04B18/0481 Primary

  Other specific industrial waste materials not provided for elsewhere in C04B18/00 · CPC title

• C04B2111/00017

  Aspects relating to the protection of the environment · CPC title