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通常化石燃料的燃烧会向大气中排放大量高浓度的CO2,其燃烧后对CO2处理减轻温室效应具有重要的环保意义。对于气体分离来说方法众多,基于膜的分离技术已经成为分离方法中极具竞争力的一种,并且成为CO2/CH4分离的有效手段之一,许多膜都能对CO2/CH4进行分离,其中主要可分为3三种:高分子膜、无机膜和混合基质膜。高分子膜通过传递性质更进一步可分为:渗透膜、促进传递膜。介绍了用于CO2/CH4气体分离的几种膜的工作原理、发展现状、瓶颈因素和解决途径,对比了各种膜的操作条件、分离效能和成本,最后提出了未来的研究方向和目标的建议。
Generally, the combustion of fossil fuels releases a large amount of high-concentration CO2 into the atmosphere, which is of great environmental significance for the CO2 treatment to mitigate the greenhouse effect after combustion. There are many ways for gas separation. Membrane-based separation techniques have become very competitive in separation methods and have become one of the most effective CO2 / CH4 separations. Many membranes are capable of separating CO2 / CH4, where Can be divided into three main types: polymer membrane, inorganic membrane and mixed matrix membrane. Polymer membrane can further be divided into transmission properties: permeable membrane, to promote the transfer membrane. The working principle, development status, bottleneck factors and solutions of several membranes for CO2 / CH4 gas separation were introduced. The operating conditions, separation efficiency and cost of various membranes were compared. Finally, the future research directions and targets Suggest.