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高性能T型沸石膜的合成及水热/耐酸性能(英文)

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Indexed by:期刊论文

Date of Publication:2018-07-04

Journal:无机化学学报

Included Journals:SCIE

Volume:34

Issue:07

Page Number:1351-1364

ISSN No.:1001-4861

Key Words:DEF;KR;EAF;RDX;NNT;FFD;QP;PQ;230;SQ;BKC;DN;

Abstract:考察了晶种尺寸形貌及晶化温度对T型沸石膜的形成演化过程以及分离性能的影响,调查表明采用小尺寸的品种可制备出致密的沸石膜,且膜的生长速率受品化温度影响,低温下合成同性能的膜需更长的品化时间.当晶种尺寸分别为0.4和0.6 μm时,423 K晶化4h可制得高性能的T型沸石膜,348 K分离90%(w/w)异丙醇/水混合物体系,其通量分别高达6.21和5.98 kg· m-2·h-1,分离因子均>10 000.实验发现,膜的形成过程受外延生长机理控制,与晶种形貌尺寸和晶化温度无关,且所制得的高性能T型沸石膜具有很好的水热稳定性及耐酸性.

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