A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for preparing carbon sequestration slurry by using modified fly ash to mineralize carbon dioxide and application of carbon sequestration slurry
The invention discloses a method for preparing carbon sequestration slurry by mineralizing carbon dioxide through modified fly ash and application of the carbon sequestration slurry. The method comprises the following steps: firstly, modifying fly ash by using microwaves, breaking a SiO2-Al2O3 polar bond and breaking a glass body; then weighing water and a decomposing agent, pouring the water and the decomposing agent into the reaction kettle, stirring, and destroying a gel structure by using microwaves to promote dissolution of calcium ions and prevent formation of a passivation layer; and finally, weighing the leaching agent, pouring the leaching agent into a reaction kettle, introducing carbon dioxide into the reaction kettle, maintaining the pressure of the carbon dioxide in the kettle to be 10-20 bar, and stirring and mineralizing to form the carbon sequestration slurry. And injecting the carbon sequestration slurry into a mine goaf for preventing coal spontaneous combustion. According to the method, massive leaching of alkali metal ions in the fly ash can be enhanced, carbon dioxide is mineralized to form the carbon sequestration product, meanwhile, the process is simple and easy to operate, and the carbon sequestration product can prevent coal spontaneous combustion in the goaf.
本发明公开了一种改性粉煤灰矿化二氧化碳制备固碳浆液的方法及其应用。首先使用微波改性粉煤灰，断裂SiO2‑Al2O3极性键并破碎玻璃体；随后称取水和分解剂倒入反应釜中，搅拌并利用微波破坏凝胶结构，促进钙离子溶出、防止形成钝化层；最后称取浸出剂倒入反应釜中，向反应釜中通入二氧化碳，维持釜内的二氧化碳压力10～20bar，并搅拌矿化形成固碳浆液。将固碳浆液注入矿井采空区用于防治煤自燃。本发明提供的方法可以强化粉煤灰中碱金属离子的大量浸出、矿化二氧化碳形成固碳产物，同时工艺简单，易于操作，固碳产物还可以防治采空区煤自燃。
Method for preparing carbon sequestration slurry by using modified fly ash to mineralize carbon dioxide and application of carbon sequestration slurry
The invention discloses a method for preparing carbon sequestration slurry by mineralizing carbon dioxide through modified fly ash and application of the carbon sequestration slurry. The method comprises the following steps: firstly, modifying fly ash by using microwaves, breaking a SiO2-Al2O3 polar bond and breaking a glass body; then weighing water and a decomposing agent, pouring the water and the decomposing agent into the reaction kettle, stirring, and destroying a gel structure by using microwaves to promote dissolution of calcium ions and prevent formation of a passivation layer; and finally, weighing the leaching agent, pouring the leaching agent into a reaction kettle, introducing carbon dioxide into the reaction kettle, maintaining the pressure of the carbon dioxide in the kettle to be 10-20 bar, and stirring and mineralizing to form the carbon sequestration slurry. And injecting the carbon sequestration slurry into a mine goaf for preventing coal spontaneous combustion. According to the method, massive leaching of alkali metal ions in the fly ash can be enhanced, carbon dioxide is mineralized to form the carbon sequestration product, meanwhile, the process is simple and easy to operate, and the carbon sequestration product can prevent coal spontaneous combustion in the goaf.
本发明公开了一种改性粉煤灰矿化二氧化碳制备固碳浆液的方法及其应用。首先使用微波改性粉煤灰，断裂SiO2‑Al2O3极性键并破碎玻璃体；随后称取水和分解剂倒入反应釜中，搅拌并利用微波破坏凝胶结构，促进钙离子溶出、防止形成钝化层；最后称取浸出剂倒入反应釜中，向反应釜中通入二氧化碳，维持釜内的二氧化碳压力10～20bar，并搅拌矿化形成固碳浆液。将固碳浆液注入矿井采空区用于防治煤自燃。本发明提供的方法可以强化粉煤灰中碱金属离子的大量浸出、矿化二氧化碳形成固碳产物，同时工艺简单，易于操作，固碳产物还可以防治采空区煤自燃。
Method for preparing carbon sequestration slurry by using modified fly ash to mineralize carbon dioxide and application of carbon sequestration slurry
一种改性粉煤灰矿化二氧化碳制备固碳浆液的方法及其应用
QIN BOTAO (author) / SHAO XU (author) / SHI QUANLIN (author) / FENG LELE (author) / MA ZUJIE (author)
2023-12-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Carbon dioxide sequestration of concrete slurry waste and its valorisation in construction products
| Online Contents | 2016
Carbon dioxide sequestration of concrete slurry waste and its valorisation in construction products
| British Library Online Contents | 2016
Carbon dioxide sequestration of concrete slurry waste and its valorisation in construction products
| British Library Online Contents | 2016