Structure, stability and permeation properties of NaA zeolite membranes for H2O/H2 and CH3OH/H2 separations

被引：25

作者：

Lee, Sang Moon ^{[1
,3
]}

Xu, Nong ^{[1
,5
]}

Grace, John R. ^{[1
]}

Li, Anwu ^{[1
,2
]}

Lim, C. Jim ^{[1
]}

Kim, Sung Su ^{[3
]}

Fotovat, Farzam ^{[1
]}

Schaadt, Achim ^{[4
]}

White, Robin J. ^{[4
]}

机构：

[1] Univ British Columbia, Dept Chem & Biol Engn, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada

[2] NORAM Engn & Constructors Ltd, Suite 1800-200, Vancouver, BC V6C 1S4, Canada

[3] Kyonggi Univ, Dept Environm Energy Engn, 94 San, Suwon 442760, Gyeonggi Do, South Korea

[4] Fraunhofer Inst Solar Energy Syst ISE, Heidenhofstr 2, D-79110 Freiburg, Germany

[5] Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF, Canada

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 01期

关键词：

NaA zeolite; Membrane; Structure; Stability; Separation factor; Sodalite; METHANOL SYNTHESIS; HYDROTHERMAL SYNTHESIS; SYNTHESIS PARAMETERS; COMPOSITE MEMBRANE; THERMAL-STABILITY; GAS-MIXTURES; TEMPERATURE; PERFORMANCE; REACTOR; DEHYDRATION;

D O I：

10.1016/j.jeurceramsoc.2017.08.012

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

NaA zeolite membranes were synthesised in the secondary growth hydrothermal method based on the seeding of the inner surface of a ceramic a-alumina tube. The impacts' of crystallisation time and zeolite precursor concentration (in H2O) were investigated. The structure and stability of the prepared NaA zeolite membranes were also investigated with operating temperatures, times and pressures. The results indicate that the optimal synthesis gel molar composition was 3Na(2)O: 2SiO2: Al2O3: 200H(2)0. This led to cubic-shaped NaA zeolite which showed good stability. The optimal NaA zeolite membrane had H2O and CH3OH fluxes of 2.77 and 0.19 kg/m(2)h, with H2O/H-2 and CH3OH/H-2 separation factors of and 0.09 at a temperature of 30 degrees C. The NaA zeolite membrane had high thermal stability, but poor separation performance at high temperature (240 degrees C). The results suggested that the H-2 permeation flux is significantly influenced by preferential adsorption of vapour in the NaA zeolite membrane.

引用

页码：211 / 219

页数：9

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