Abstract High performance mordenite membranes were successfully prepared on porous α-Al2O3 tubes by a novel two-stage varying heating-rate procedure under microwave assisted heating. The effect of heating rate on microstructure and performance of mordenite membrane was first time to be investigated. It was found that slowing down the heating rate at lower temperature range can improve the nucleation process, and further enhance compactness as well as performance of mordenite membrane. Crystallization time was also optimized for the preparation of high-quality mordenite membrane and it was reduced to only 75 min in this work. The as-synthesized M14 exhibits an excellent PV performance for dehydration of 90 wt% acetic acid/water mixture at 75 °C with a flux of 1.48 kg m−2 h−1 and a separation factor of larger than 10,000, which shows an excellent potential for dehydration of acetic acid aqueous solutions in industrial separation applications. Our work also provides a new idea for regulating microstructure and performance of zeolite membrane.

中文翻译：

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两段变升温程序微波合成优质丝光沸石膜

摘要 在微波辅助加热下，通过新型的两阶段变加热速率程序，在多孔α-Al2O3 管上成功制备了高性能丝光沸石膜。首次研究了升温速率对丝光沸石膜微观结构和性能的影响。结果表明，在较低温度范围内降低加热速度可以改善成核过程，并进一步提高丝光沸石膜的致密性和性能。为了制备高质量丝光沸石膜，还优化了结晶时间，在这项工作中将结晶时间缩短到仅 75 分钟。合成后的 M14 在 75 °C 下对 90 wt% 乙酸/水混合物的脱水表现出优异的 PV 性能，通量为 1.48 kg m-2 h-1，分离因子大于 10,000，这显示出在工业分离应用中对乙酸水溶液进行脱水的极好潜力。我们的工作也为调节沸石膜的微观结构和性能提供了新的思路。