Mechanism of Gas Separation through Amorphous Silicon Oxycarbide Membranes

被引：19

作者：

Prasad, Ravi Mohan ^{[1
,2
]}

Juettke, Yvonne ^{[4
]}

Richter, Hannes ^{[4
]}

Voigt, Ingolf ^{[4
]}

Riedel, Ralf ^{[1
]}

Gurlo, Aleksander ^{[1
,3
]}

机构：

[1] Tech Univ Darmstadt, Fachbereich Mat & Geowissensch, Fachgebiet Disperse Feststoffe, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany

[2] Indian Inst Technol Ropar, Sch Mech Mat & Energy Engn, Nangal Rd, Rupnagar 140001, Punjab, India

[3] Tech Univ Berlin, Inst Werkstoffwissensch & Technol, Fachgebiet Keram Werkstoffe, Hardenbergstr 40, D-10623 Berlin, Germany

[4] Fraunhofer Inst Ceram Technol & Syst, Michael Faraday Str 1, D-07629 Hermsdorf, Germany

来源：

ADVANCED ENGINEERING MATERIALS | 2016年 / 18卷 / 05期

关键词：

HYDROGEN SEPARATION; HYDROTHERMAL STABILITY; CERAMIC MEMBRANES; MICROPOROUS SILICA; ZEOLITE MEMBRANES; POLYMER MEMBRANES; CARBIDE MEMBRANES; CARBON MEMBRANES; ORGANIC-DYES; PURIFICATION;

D O I：

10.1002/adem.201500380

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polymer-derived amorphous silicon oxycarbide (SiOC) ceramics are designed for hydrogen separation at high temperatures. To form amorphous SiOC top-coating with the thickness of about 300 nm, tubular porous gamma-Al2O3/a-Al2O3 substrates with gradient porosity are threefold coated by vinyl-functionalized polysiloxane and pyrolyzed at 700 degrees C under argon. N-2-physisorption measurement confirms formation of microporous material with a specific surface area of about 400 m(2) g(-1). Single gas permeance characterization of the SiOC membrane at 300 degrees C reveals H-2/CO2 and H-2/SF6 ideal permselectivities of about 10 and 320, respectively. The experimental gas permeance data are modeled using solid-state diffusion (for He and H-2) and gas translational diffusion (for CO2 and SF6) mechanisms.

引用

页码：721 / 727

页数：7

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