Efficient Synthesis of Dimethyl Ether from Methanol in a Bifunctional Zeolite Membrane Reactor

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• 作者：Dr. Chen Zhou ; Dr. Nanyi Wang ; Dr. Yanan Qian ; Prof. Dr. Xiaoxing Liu ; Prof. Dr. Jü ; rgen Caro and Prof. Dr. Aisheng Huang
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：October 4, 2016
• 年：2016
• 卷：55
• 期：41
• 页码：12678-12682
• 全文大小：1320K
• ISSN：1521-3773

文摘

A sandwich FAU–LTA zeolite dual-layer membrane has been developed and used as a catalytic membrane reactor for the synthesis of dimethyl ether (DME). In the top H-FAU layer with mild acidity, methanol is dehydrated to DME. The other reaction product, water, is removed in situ through a hydrophilic Na-LTA layer, which is located between the porous alumina support and the H-FAU top layer. The combination of mild acidity with the continuous removal of water results in high methanol conversion (90.9 % at 310 °C) and essentially 100 % DME selectivity. Furthermore, owing to the selective and continuous removal of water through the Na-LTA membrane, catalyst deactivation can be effectively suppressed.