Metallic Honeycomb Catalysts for Methane Steam Reforming: Effect of the Bimetallic Surface Coating on Catalytic Properties

Metallic Honeycomb Catalysts for Methane Steam Reforming: Effect of the Bimetallic Surface Coating on Catalytic Properties

Metallic honeycomb catalysts are promising candidates for fuel cell and small-scale onsite hydrogen production applications. In this study, high-cell-density Ni honeycomb catalysts coated with a series of bimetallic surface layers were synthesized. Their catalytic performance for CH4 steam reforming...

Full description

Saved in:
Bibliographic Details
Published in:MATERIALS TRANSACTIONS Vol. 64; no. 10; pp. MT-MH2022005 - 2416
Main Authors: Nakasone, Tsukasa, Xu, Ya, Tamura, Ryuji
Format: Journal Article
Language:English
Published: Sendai The Japan Institute of Metals and Materials 01-10-2023
Japan Science and Technology Agency
Subjects:
Bimetals
Catalysts
Catalytic converters
Chemical synthesis
Coatings
Fuel cells
Hydrogen production
Iron
Iron compounds
Magnesium
metallic honeycomb catalyst
Methane
methane steam reforming
Nickel base alloys
Nickel compounds
nickel-based bimetallic coating
Reforming
Surface layers
Zirconium
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Metallic honeycomb catalysts are promising candidates for fuel cell and small-scale onsite hydrogen production applications. In this study, high-cell-density Ni honeycomb catalysts coated with a series of bimetallic surface layers were synthesized. Their catalytic performance for CH4 steam reforming was investigated under a low steam-to-carbon ratio of 1.36 and a gas hourly space velocity of 6400 h-1 in the temperature range of 400–700°C. The catalysts coated with Ni-Mg and Ni-Zr showed excellent catalytic performance, reaching a high CH4 conversion and CO selectivity close to the equilibrium values within the test temperature range. The enhanced catalytic performance of the Ni-Mg and Ni-Zr coatings was attributed to the formation of oxide-supported fine Ni particles. In contrast, the catalysts coated with Ni-Fe and Ni-Sn exhibited an extremely low activity, which was lower than that of the catalyst coated with only Ni. The low activity of the Ni-Fe and Ni-Sn coatings is supposed to be due to the formation of aggregated Ni3Fe, Ni3Sn, and Ni3Sn2 phases.
ISSN:1345-9678
1347-5320
DOI:10.2320/matertrans.MT-MH2022005