Zeolitic aluminophosphate, a three-dimensional microporous material, with an average pore size of 0.38 nm is good candidate for molecular sieve application in CO2 gas separation. The separation of CO2 /CH4 gas mixtures for precombustion processes is desirable from the standpoint of both environmental concerns and energy efficiency. This study concerns an environmentally friendly method to synthesize zeolitic aluminophosphate thin films on various configurations and low-cost kaolin porous substrates with high performance in the separation of CO2 /CH4 mixtures. The membranes are prepared by a gelless seed growth method that uses lower amounts of chemicals, forms no liquid gel, chemical waste, or byproducts and generates no washing water. The obtained membranes show very high selectivity for CO2 with a CO2 /CH4 separation factor above 1000 in the separation of CO2 /CH4 gas mixtures.

中文翻译：

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沸石铝磷酸盐膜在多孔载体上的无胶二次生长，在二氧化碳/甲烷分离中具有较高的性能。

沸石微晶铝磷酸盐，一种三维微孔材料，平均孔径为0.38 nm，是在CO2气体分离中应用分子筛的良好选择。从对环境的关注和能源效率的角度来看，用于预燃烧过程的CO 2 / CH 4气体混合物的分离是理想的。这项研究涉及一种环境友好的方法，该方法可在各种结构和低成本高岭土多孔基材上合成具有高分离度的CO2 / CH4混合物的沸石铝磷酸盐薄膜。膜是通过无胶种子生长方法制备的，该方法使用较少量的化学药品，不形成液体凝胶，化学废料或副产物，并且不产生洗涤水。