表面活性剂对气体水合物生成过程的定量影响  

Quantitative Influence of Surfactant on the Formation Process for Gas Hydrate

作　　者：张学民[1,2,3] 李洋 姚泽[1,2] 李金平 吴青柏[1,4] 袁吉 Xuemin ZHANG;Yang LI;Ze YAO;Jinping LI;Qingbai WU;Ji YUAN(Western China Energy ＆ Environment Research Center, Lanzhou University of Technology, Lanzhou, Gansu 730050, China;Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou, Gansu 730050, China;Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, CAS, Guangzhou, Guangdong 510640, China;Cold and Arid Regions Environmental Engineering Research Institute, CAS, Lanzhou, Gansu 730000, China)

机构地区：[1]兰州理工大学西部能源与环境研究中心,甘肃兰州730050 [2]甘肃省生物质能与太阳能互补供能系统重点实验室,甘肃兰州730050 [3]中国科学院天然气水合物重点实验室,广东广州510640 [4]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《过程工程学报》2018年第2期356-360,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51266005);甘肃省自然科学基金资助项目(编号:1606RJZA082);中国科学院天然气水合物重点实验室开放基金资助项目(编号:Y607kh1001)

摘　　要：为确定HCFC-141b水合物生成条件下阴离子表面活性剂十二烷基硫酸钠（SDS）和十二烷基苯磺酸钠（SDBS）的临界胶束浓度（CMC）,在0-20℃温度下,通过圆环法实验研究了不同浓度表面活性剂溶液体系的表面张力,考察了表面活性剂对溶液体系表面张力的影响机理并通过C3H8水合物的生成过程实验进行了验证,确定了SDS和SDBS的临界胶束浓度.结果表明,当SDS和SDBS的质量浓度分别低于500×10^-6和100×10^-6时,表面活性剂降低水表面张力的效果最明显,二者的CMC分别为1 950×10^-6和400×10^-6,表面活性剂能明显缩短水合反应的诱导时间,提高了其平均生成速率.In order to confirm the critical micelle concentrations （CMC） of anionic surfactants sodium dodecyl sulfate （SDS） and sodium dodecyl benzene sulfonate （SDBS） under hydrate formation conditions, the surface tension of SDS and SDBS solution with different concentrations were measured by ring method in the temperature range of 0-20 ℃. The influence mechanism of surfactant on the surihce tension of solution system was revealed and verified through formation experiment of C3H8 hydrate, the CMC of SDS and SDBS solution under conditions of HCFC-141b hydrate formation were determined. The results showed that the effect of surfactant on surface tension decrease of water is most obvious when the weight concentration of SDS and SDBS solution was below 500×10^-6 and 100×10^-6, the CMC of SDS and SDBS solution are 1 950×10^-6 and 400×10^-6, respectively, near the conditions of HCFC-141b hydrate formation. Under the CMC, surfactant obviously promoted the formation process of C3H8 hydrate and shortened the induction time and increase the formation rate of gas hydrate.

关 键 词：水合物 表面活性剂 表面张力 临界胶束浓度 生成速率 

分 类 号：TK121[动力工程及工程热物理—工程热物理]