Scale-up of SAPO-34 membranes for CO2/CH4 separation

被引：85

作者：

Li, Shiguang ^{[1
]}

Carreon, Moises A. ^{[1
]}

Zhang, Yanfeng ^{[1
]}

Funke, Hans H. ^{[1
]}

Noble, Richard D. ^{[1
]}

Falconer, John L. ^{[1
]}

机构：

[1] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80309 USA

来源：

JOURNAL OF MEMBRANE SCIENCE | 2010年 / 352卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

Gas separation; SAPO-34; membrane; Carbon dioxide/methane separation; Membrane preparation; Membrane scale-up; GAS SEPARATION; ZEOLITE MEMBRANES; PERMEATION; DIFFRACTION; MIXTURES; PRESSURE;

D O I：

10.1016/j.memsci.2010.01.037

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

High flux SAPO-34 membranes on porous, tubular stainless steel supports with CO2/CH4 separation selectivities greater than 200 were scaled up from 5 cm length to 25 cm (a factor of 7.5 increase in membrane area). The preparation of the 25-cm membranes required a more dilute synthesis gel and shorter crystallization times to avoid excess build-up of zeolite crystals at the bottom of the membrane tubes. These changes yielded 25-cm membranes with similar permeances and selectivities to those of the 5-cm membranes. Aluminum sources, gel compositions, and synthesis procedures were systematically investigated to lower the membrane cost, optimize the separation performance, and obtain good reproducibility. The CO2 permeances of the 25-cm membranes were approximately 5 x 10(-7) mol/(m(2) s Pa) at 295 K for a feed pressure of 138 kPa and a 50/50 feed. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：7 / 13

页数：7

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