臧小亚^1，2，3,梁德青^1，2，3,吴能友⁴

• 1:中国科学院 天然气水合物重点实验室，广东 广州 510640
• 2:广东省新能源和可再生能源研究开发与应用重点实验室，广东 广州 510640
• 3:中国科学院广州能源研究所，广东 广州 510640
• 4:中国地质调查局青岛海洋地质研究所，山东 青岛 266000

摘要(Abstract)：

沼气是含CO₂和CH₄的混合气，它的利用需要去除杂质CO₂。四丁基溴化铵（TBAB）半笼型水合物法分离CO₂是一种新型分离技术。研究了在不同TBAB水溶液浓度体系中，摩尔比为50：50的CH₄/CO₂混合气水合物在277 K和5 MPa条件下的生成过程及CO₂的分离效果。结果表明，当TBAB水溶液质量浓度为0.79%和1.57%时，水合物生成过程存在“二次生成”现象。当TBAB的浓度为0.79%和2.91%时，气体消耗量为0.42 mol，大于其它的TBAB水溶液浓度条件下体系的气体消耗量。综合得出，CO₂分离效果并非与TBAB水溶液浓度呈比例，而是存在一个最佳的TBAB浓度最适宜CO₂气体的分离。在实验条件下，当TBAB水溶液质量浓度为1.57%时，有效反应时间最短且CO₂分离效果最好。

关键词(KeyWords)： 水合物;CO₂分离;四丁基溴化铵(TBAB);沼气

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51676197，41276043，51206169）；国家海洋地质专项项目（GHZ2012006003）；中国科学院知识创新工程重要方向项目（KGZD-EW-301）；国家高技术研究发展计划项目（2012AA061403-03）。

作者(Author): 臧小亚^1，2，3,梁德青^1，2，3,吴能友⁴

DOI: 10.3969/j.issn.1003-9015.2016.06.002

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