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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CO_2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CO_2的溶液中极易析出;灰岩溶蚀速率随CO_2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。
Based on the IS-100 high-pressure gas isothermal adsorption / desorption apparatus and self-made sealed reactor as experimental platform, the gas-water-rock interaction between CO 2 and deep aquifer limestone under different pressures and different time scales after geological disposal was simulated. The experimental results show that calcium ions in limestone are easily precipitated in the solution containing CO_2. The limestone dissolution rate increases linearly with the increase of CO_2 injection pressure. The limestone dissolution increases with time, but the dissolution rate gradually increases Decrease, and tend to be stable.