ABSTRACT

The injection of carbon dioxide (CO₂) into gob contributes to the geological sequestration of CO₂. The chemical inhibitors, which are used for fire protection, can promote the sequestration of CO₂. High pressure adsorption tests, swelling experiments and scanning electron microscopy were used to analyze the effects of several chemical inhibitors on the CO₂ adsorption and on the coal pore structure. The adsorption capacity of CO₂ and its pore volume increase after spaying an inhibitor solution. The treatment of coal in an inhibitor solution increases its pore size distribution from 0.4 nm to 0.6 nm in coal. Moreover, pore sizes lower than 0.419 nm increase together with the adsorption capacity of CO₂. Based on the swelling experiments, soaking coal in an inhibitor solution induces a swelling effect on the compound, which leads to an increase in the size of its pores and cracks. This increasing trend of the pores and cracks has been verified by a series of adsorption experiments. The results obtained in this paper provide a basis for the development of further applications based on the CO₂ storage technology.

摘要

将二氧化碳 (CO ₂ ) 注入采空区有助于 CO ₂的地质封存。用于防火的化学抑制剂可以促进CO ₂的封存。采用高压吸附试验、溶胀实验和扫描电镜分析了几种化学抑制剂对CO ₂吸附和煤孔隙结构的影响。喷洒缓蚀剂溶液后CO ₂的吸附能力和孔体积增加。在抑制剂溶液中对煤的处理使其在煤中的孔径分布从 0.4 nm 增加到 0.6 nm。此外，小于 0.419 nm 的孔径随着 CO 的吸附能力而增加₂ . 根据溶胀实验，将煤浸泡在抑制剂溶液中会对化合物产生溶胀作用，从而导致其孔隙和裂缝的尺寸增加。这种孔隙和裂缝的增加趋势已通过一系列吸附实验得到验证。本文获得的结果为进一步开发基于CO ₂存储技术的应用提供了依据。