Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2009-08-25

Journal: CATALYSIS COMMUNICATIONS

Included Journals: EI、SCIE

Volume: 10

Issue: 14

Page Number: 1804-1807

ISSN: 1566-7367

Key Words: Core-shell catalyst; Nickel catalyst; Fuel cell; Methane steam reforming; Catalyst deactivation; Zeolite membrane

Abstract: A thin layer of silicalite-1 zeolite membrane was grown on the surface of Ni/SiO(2) and Ni/Al(2)O(3) catalyst beads after seeding and secondary regrowth to create core-shell catalysts that are resistant to alkali poisoning from direct internal reforming-mol ten carbonate fuel cell (DIR-MCFC). The zeolite shell thickness was optimized to prevent poisoning and minimize diffusion resistance. An out-of-cell test was designed to simulate the fuel cell operating conditions, which showed that the new core-shell catalysts maintained a high activity similar to the original fresh catalyst in spite of the exposure to alkali vapor at high temperature. The conventional Ni/SiO(2) and Ni/Al(2)O(3) catalysts suffered higher than 80% decrease in activity for steam reforming of methane reaction (SRM). (c) 2009 Elsevier B.V. All rights reserved.