Combination of surfactants and organic compounds for boosting CO₂ separation from natural gas by clathrate hydrate formation

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• 作者：Marvin Ricaurte ; Christophe Dicharry ; Xavier Renaud ; Jean-Philippe Torr茅
• 关键词：Gas hydrate ; Additives ; Carbon dioxide separation ; Natural gas ; Promoters
• 刊名：Fuel
• 出版年：15 April, 2014
• 年：2014
• 卷：122
• 期：Complete
• 页码：206-217
• 全文大小：2039 K

文摘

This study investigates the effects of several combinations of surfactants and organic compounds on the separation of CO₂ from a CO₂-CH₄ gas mixture by clathrate hydrate formation. Seven additives, three surfactants (SDS, SDBS, DATCl) and four organic compounds (THF, 1,3-dioxolane, 2-methyl-tetrahydrofuran and cyclopentane) were tested for various operating conditions and at different concentrations. The influence of these additives on the quantity of gas removed, the selectivity of the separation toward CO₂, and the kinetics of hydrate formation were analyzed through experiments in a batch reactor. It was found that a suitable combination of a surfactant and a organic compound can, in some cases, strongly enhance the hydrate crystallization. The best results were obtained with a combination of the additives SDS and THF.