Method for filling mine goaf and sealing and storing solidified CO2 by using foam geopolymer

Abstract

The invention discloses a method for filling a mine goaf and sealing and storing solidified CO2 by using a foam geopolymer. Superfine slag powder and other solid residue micropowder are used as main raw materials of the foam geopolymer, water glass is used as an activator, CO2 gas is used as a foam filling gas, and geopolymer foam concrete sealed and stored with the CO2 gas is prepared, and then is filled in a mine. The carbon dioxide is absorbed by carbonation reaction to improve the strength of the geopolymer, transient sealing and storing of the foam concrete to the CO2 gas and permanent solidification of the CO2 gas which overflows slowly and is gradually absorbed by soil can be realized, effective unification of utilization, sealing and storing and solidification of CO2 is achieved, and the method is a stable and long-lasting carbon sequestration mode.

Description

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AI Technical Summary

Benefits of technology

This invention allows for better use of large amounts of carbon dioxide (CO2) stored by storing it under pressure at room temperature or below without losing its effectiveness over time due to crystallization issues during long-term storage.

Problems solved by technology

This patented describes two methods currently being developed to address issues related to greenhouse gas production caused by human activities like fossil fuel consumption and environmental pollution. One method involves capturing CO_{2/O, while another focuses on storing excessive amounts of CO_2. However existing solutions either require expensive equipment or involve long periods of processing before reaching their full capacity. There remains room for improvement through improved techniques involving both chemical and physical means.}

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