Preparation and characterization of SiO2 composite membrane for purification of hydrogen from methanol steam reforming as an energy carrier system for PEMFC

• Published in: Separation and purification technology Vol. 32; no. 1-3; pp. 45 - 50
• Main Authors: LEE, Dong-Wook, LEE, Yoon-Gyu, NAM, Seong-Eun, BONGKUK SEA, LEE, Kew-Ho
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Amsterdam Elsevier Science 01.07.2003
• Subjects: Applied sciences; Chemistry; Colloidal state and disperse state; Energy; Energy. Thermal use of fuels; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fuel cells; General and physical chemistry; Membranes; Characterization; Membrane separation; Purification; Hydrogen; Sol gel process; Stainless steel; Preparation; Experimental study; Solid electrolyte fuel cells; Silica; Composite material; Inorganic membrane
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/S1383-5866(03)00041-8

Silica/porous stainless steel (SUS) composite membranes were prepared for carbon monoxide (CO) removal from products of methanol steam reforming. A support was prepared by coating Ni powder with sub-micron level and SiO2 sols with particle size of 500 and 150 nm in turns on SUS. Silica top layer was coated on the modified support using colloidal sol with nanoparticle. As a result of mixture gas permeation test of silica composite membrane using H2(99%)/CO(1%), CO concentration of 10 000 ppm was reduced to under 81 ppm, which is acceptable in polymeric electrolyte membrane fuel cell (PEMFC) anode gas purification. Permeation mechanism through the membrane was mainly molecular sieving.