Preparation of steam-stable high-silica CHA (SSZ-13) membranes for CO2/CH4 and C2H4/C2H6 separation

被引：150

作者：

Zheng, Yihong ^{[1
,2
]}

Hu, Na ^{[2
]}

Wang, Huamei ^{[2
]}

Bu, Na ^{[2
]}

Zhang, Fei ^{[2
]}

Zhou, Rongfei ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ, Dept Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China

[2] Jiangxi Normal Univ, Dept Chem & Chem Engn, Nanchang 330022, Peoples R China

来源：

JOURNAL OF MEMBRANE SCIENCE | 2015年 / 475卷

关键词：

High-silica CHA; SSZ-13; membrane; CO2/CH4; separation; C2H4/C2H6; Structural-directing agent; SI-CHA; SAPO-34; MEMBRANES; ZEOLITE; CO2; TEMPERATURE; PERMEATION; ADSORPTION; MIXTURES; DDR;

D O I：

10.1016/j.memsci.2014.10.048

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

High-quality SSZ-13 membranes were synthesized using the combinative structure-directing agents of N,N,N, trimethtyl-1-aclamantammonium hydroxide and tetraethylammonium hydroxide by one hydrothermal treatment step. The two organics took a "cooperative structural-directing" role on SSZ-13 crystallization. The best membrane had a CO2 permeance of 2.0 x 10(-7) mol/(m(2) s Pa) with a CO2/CH4 selectivity of 300 and a C2H4 permeance of 2.9 x 10(-9) mol/(m(2) s Pa) with a C2H4/C2H6 selectivity of 11, at 303 K and 0.2 MPa feed pressure for these equimolar binary mixtures, respectively. SSZ-13 membranes also displayed high performances for CO2/CH4 and C2H4/C2H6 separations at higher feed pressures of 0.8-1 MPa. These SSZ-13 membranes were hydrothermally stable at steam for at least 4 days at 378 K and acid-resistance at pH = 1. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：303 / 310

页数：8

共 30 条

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