Affordable Access

Publisher Website

Methane decomposition into hydrogen and carbon nanofibers over supported Pd–Ni catalysts

Authors
Journal
Journal of Catalysis
0021-9517
Publisher
Elsevier
Publication Date
Volume
220
Issue
2
Identifiers
DOI: 10.1016/s0021-9517(03)00244-6
Keywords
  • Supported Pd–Ni Catalysts
  • Pure Hydrogen
  • Carbon Nanofibers
  • Pd–Ni Alloys

Abstract

Abstract The effect of the addition of different metals (Cu, Rh, Pd, Ir, and Pt) into supported Ni catalysts on the catalytic performance of methane decomposition into pure hydrogen and carbon was examined. The addition of Pd brought about considerable increases in the catalytic life and in the accumulated yields of hydrogen and carbon at the complete deactivation of the catalyst, while modification with the other metals decreased the yields compared to those for Ni/SiO 2. For the Ni catalysts modified with Pd, the appropriate preparation conditions of the catalysts, the effect of catalytic supports, and the optimum reaction temperature on the methane decomposition were examined. The hydrogen yield attained a high value, 16,000 mol H 2 /mol Pd+Ni, when Pd and Ni were of a mole ratio Pd/(Pd+Ni)=0.5 and a total loading Pd+Ni=37 wt% on carbon nanofiber support. This yield is the highest among those reported so far. Methane decomposition over Ni catalysts modified with Pd produced carbon nanofibers with unique structures, i.e., branched carbon nanofibers. XRD studies on the Ni catalysts modified with Pd indicated the formation of Pd–Ni alloys. The alloys are responsible for the increase in the catalytic life and the formation of carbon nanofibers with unique structures.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Production of hydrogen and carbon nanofibers throu...

on International Journal of Hydro... Jan 01, 2010

Production of hydrogen and carbon nanofibers throu...

on International Journal of Hydro... Jan 01, 2011

Novel Ni catalysts for methane decomposition to hy...

on Journal of Catalysis Jan 01, 2006

Synthesizing carbon nanotubes and carbon nanofiber...

on Diamond and Related Materials Jan 01, 2007
More articles like this..