化工进展2023，Vol.42Issue(11)：6093-6101,9.DOI:10.16085/j.issn.1000-6613.2022-2387
NaCl浓度对CO2水合物形成与稳定性的影响
Effect of NaCl concentration on the formation and stability of CO2 hydrate
摘要
Abstract
In order to clarify the effect of NaCl content on the formation and stability of CO2 hydrate,this paper used silica gel as the porous medium to form hydrate under the initial temperature and pressure of-0.5℃ and 3.3MPa,respectively,and carried out hydrate decomposition experiments under the conditions of 1.5℃ and 0MPa.The formation and decomposition rules of CO2 hydrate in the system with different concentrations of NaCl(0.18-0.53g/L)were determined.The experimental results showed that:the induced nucleation time of CO2 hydrate shortened with the increase of NaCl concentration,and the nucleation time was smaller than that of the pure ice powder system when the concentration was greater than 0.48g/L,but the amount of hydrate generation and the induced nucleation time showed an opposite trend with the change of NaCl concentration;NaCl was not conducive to the rapid formation of hydrate during the primary pressurization,and during the secondary pressurization,only 0.28-0.38g/L NaCl promoted the hydrate formation rate.Meanwhile,it was found that the addition of NaCl enhanced the stability of CO2 hydrate,the stability of hydrate increased and then decreased with the increase of NaCl concentration,and the stability was best at 0.38g/L NaCl concentration.关键词
硅胶/氯化钠/CO2水合物/二次加压/生成特征/水合物稳定性Key words
silica gel/NaCl/CO2 hydrate/secondary pressurization/generation characteristics/hydrate stability分类
能源科技引用本文复制引用
王英梅,刘生浩,滕亚栋,王立瑾,焦雯泽..NaCl浓度对CO2水合物形成与稳定性的影响[J].化工进展,2023,42(11):6093-6101,9.基金项目
国家自然科学基金(41661103,41601079) （41661103,41601079）
国家重点研发计划(2017YFC0307303) （2017YFC0307303）
中国科学院冻土工程国家重点实验室开放基金(SKLFSE201406). （SKLFSE201406）
