1. Gelless Secondary Growth of Zeolitic Aluminophosphate Membranes on Porous Supports with High Performance in CO2/CH4Separation
- Author
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Duy Phuc-Hoang Nguyen, Nha Minh Nguyen, Tung Ngoc Nguyen, Ty Minh Nguyen, Quang Thanh Le, Duy Hoai‐Phuong Nguyen, and Tung Cao-Thanh Pham
- Subjects
Materials science ,Secondary growth ,General Chemical Engineering ,02 engineering and technology ,Microporous material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Molecular sieve ,01 natural sciences ,Environmentally friendly ,0104 chemical sciences ,Membrane technology ,General Energy ,Membrane ,Chemical engineering ,Environmental Chemistry ,General Materials Science ,Thin film ,0210 nano-technology ,Porosity - Abstract
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.
- Published
- 2020
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