聚乙烯吡咯烷酮对甲烷水合物形成热力学条件的影响  

Equilibrium Conditions for Methane Hydrate in the Presence of Polyvinylpyrrolidone Aqueous Solutions

作　　者：唐翠萍[1] 戴兴学[1] 梁德青[1] 

机构地区：[1]中国科学院广州能源研究所中国科学院天然气水合物重点实验室,广州510640

出　　处：《新能源进展》2016年第1期28-32,共5页Advances in New and Renewable Energy

基　　金：国家自然科学基金(41406103)

摘　　要：低剂量抑制剂对天然气水合物形成条件的影响对组合抑制剂的开发和选用具有重要意义。本文采用定容压力搜索法,在282.6 K^290.3 K范围内测定了纯水和含低剂量抑制剂聚乙烯吡咯烷酮水溶液的甲烷水合物形成相平衡条件。测量结果显示浓度为0.5wt%、5wt%和15wt%的聚乙烯吡咯烷酮对水合物形成条件有促进作用,但促进作用不大,分析认为高分子的加入降低了溶液的活度,但是增加了溶液对甲烷的溶解度,而活度降低和甲烷溶解度增加对甲烷水合物形成相平衡条件影响相反。Influence of low dosage hydrate inhibitors on gas hydrate formation condition is important for development and chooses of combined hydrate inhibitors. By using polyvinylpyrrolidone aqueous solutions, experimental data on the equilibrium conditions for methane hydrate with different concentrations within the temperature range from 282.6 K to 290.3 K were reported in this work. Measurements were made using an isochoric pressure-search method. The results show polyvinylpyrrolidone with the concentration from 0.5wt% to 15wt% has a little promoting effect on methane hydrate formation equilibrium conditions, and it is thought that addition of the polymer of polyvinylpyrrolidone can decrease the solution activity, but can increase the solubility of methane in this polymer solution.

关 键 词：低剂量抑制剂 水合物 形成 相平衡 

分 类 号：TK019[动力工程及工程热物理]