摘要
设计加工了一套研究水合物稳定条件的实验装置,采用多步加热分解法对不同浓度的盐溶液中的甲烷水合物稳定条件进行了初步研究。实验测定了4种不同浓度的NaBr和KBr溶液中甲烷水合物的P—T稳定条件,结果表明,相同浓度下Na+对稳定性的影响大于K+;当NaBr和KBr浓度均为0.2 mol/L时,其稳定点相对与纯水分别降低了(0.5±0.1)K和(0.2±0.1)K;当NaBr和KBr浓度均为0.3 mol/L时,其稳定点相对与纯水分别降低了(1.0±0.1)K和(0.5±0.1)K。
An experimental setup has been built to study the stability conditions of gas hydrate.The stability conditions of methane hydrate in solutions with different salt concentration are preliminarily investigated using multi-step dissociation method.In this paper,P—T conditions of methane hydrate have been measured in four kinds of solutions containing various concentrations of NaBr and/or KBr.The results show that the influence of Na＋ ion under certain P—T conditions is stronger than K＋ ion under same concentration.In the NaBr and KBr solutions with concentrations of 0.2mol/L and 0.3mol/L,the equilibrium points of methane hydrate were（0.5±0.1） K and（0.2±0.1） K,and（1.0±0.1） K and（0.5±0.1） K respectively,lower than those in a pure water system.
出处
《海洋地质前沿》
北大核心
2011年第6期44-48,共5页
Marine Geology Frontiers
基金
国家重点基础研究发展计划(2009CB219503)
国土资源部公益性行业科研专项(201111026)
