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利用旋转盘实验装置和高分子生物催化剂技术,笔者研究了流动CO_2-H_2O系统中方解石溶解动力学及其控制机制。实验发现,方解石的溶解既受到固-液界面间扩散边界层(DBL)的控制,还受到扩散边界层内CO_2慢速转换反应(CO_2+H_2OH~+HCO_3~-)的控制。然而,高CO_2分压(P_(CO_2)>0.01 atm)时,溶解主要为CO_2慢速转换控制,而低CO_2分压(P_(CO)_2<0.01atm)时,溶解主要为扩散边界层控制。对于这些发现,利用DBL理论模型进行了成功的解释。
Using the rotating disc experimental apparatus and polymer biocatalyst technology, the author studied the dissolution kinetics of calcite in mobile CO_2-H_2O system and its control mechanism. It was found that the dissolution of calcite was controlled by both the DBL and the slow CO 2 conversion reaction (CO 2 + H 2 OH ~ + HCO 3 - -) in the diffusion boundary layer. However, when the partial pressure of CO_2 was 0.01 atm (P_ (CO_2)), the dissolution was mainly controlled by slow CO_2 conversion and the CO_2 partial pressure (P_ (CO) _2 <0.01atm) was dominated by the diffusion boundary layer . For these findings, a successful explanation is made using the DBL theoretical model.