化工学报2011，Vol.62Issue(4)：889-894,6.
粉土中CO2水合物的稳定性条件
Stability condition of CO2 hydrate in silts
摘要
Abstract
Evaluation of stability condition is an important issue in the study of gas hydrate. In this study,the stability conditions for the bulk CO2 hydrate and the CO2 hydrate in silts with dry densities 1.40 g ·cm-3 , 1.50 g · cm-3 and 1.65 g ·cm-3 , respectively, are measured and compared. It is shown that the pore effect of silts affects the stability of CO2 hydrate. Compared with the bulk hydrate, the hydrate in the silts has higher equilibrium pressure and lower equilibrium temperature. In addition, the initial dissociation temperature of pore hydrate may affect the stability of hydrate in the silts. Based on the modified van der Waals-Platteeuw model, the stability conditions of gas hydrate in the silt with density 1.65 g · cm-3 are analyzed. It is found that the effect of capillarity on the stability varies. As the hydrate in the silt dissociates, the capillary effect diminishes.关键词
粉土/CO2水合物/毛细效应/稳定性条件Key words
silts/ CO2 hydrate/ capillary effect/ stability conditions分类
能源科技引用本文复制引用
颜荣涛,魏厚振,吴二林,鲁晓兵,韦昌富..粉土中CO2水合物的稳定性条件[J].化工学报,2011,62(4):889-894,6.基金项目
中科院"百人计划"择优支持项目 （）
中国科学院知识创新工程重要方向项目(KZCX2-YW-JSL08) （KZCX2-YW-JSL08）
岩土力学与工程国家重点实验室开放基金项目(ZO00801) （ZO00801）
国家科技重大专项课题(2008ZX05026-004-10). （2008ZX05026-004-10）
