【摘要】 研究基于IS-100型高压气体等温吸附/解吸仪与自制密封反应器为实验平台,模拟了地质处置后CO₂在不同压力和不同时间尺度下与深部含水灰岩的气-水-岩作用。实验结果表明:灰岩中钙离子在溶有CO₂的溶液中极易析出;灰岩溶蚀速率随CO₂注入压力的增高而呈线性增加;灰岩溶蚀量随时间的延长而增加,但溶蚀速率逐渐减小,并趋于稳定。更多还原

【Abstract】 The gas-water-rock action mechanism of CO₂ with deep-water limestone after CO₂ geological disposal at different pressures and different time scales is simulated on the base of IS-100 type high pressure gas isothermal adsorption/desorption instrument and self-made seal reaction tanks. The experiment results show that the calcium of limestone is easily precipitate in solution of CO₂; the dissolution rate of limestone increased linearly with the increase of CO₂ injection pressure; the amount of limestone dissolution increased with time, but the dissolution rate gradually decreased and stabilized.更多还原