Reactors, Kinetics, and Catalysis

Enhanced oxygen mobility and reactivity for ethanol steam reforming

  1. Chengxi Zhang,
  2. Shuirong Li,
  3. Maoshuai Li,
  4. Shengping Wang,
  5. Xinbin Ma*,
  6. Jinlong Gong*

Article first published online: 31 MAR 2011

DOI: 10.1002/aic.12599

Issue

AIChE Journal

AIChE Journal

Volume 58, Issue 2, pages 516–525, February 2012

Additional Information

How to Cite

Zhang, C., Li, S., Li, M., Wang, S., Ma, X. and Gong, J. (2012), Enhanced oxygen mobility and reactivity for ethanol steam reforming. AIChE J., 58: 516–525. doi: 10.1002/aic.12599

Author Information

  1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P.R. China

*Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P.R. China

Publication History

  1. Issue published online: 6 JAN 2012
  2. Article first published online: 31 MAR 2011
  3. Accepted manuscript online: 25 FEB 2011 09:30AM EST
  4. Manuscript Revised: 15 FEB 2011
  5. Manuscript Received: 6 JAN 2011

Funded by

  • National Natural Science Foundation of China. Grant Numbers: 21006068, 20936003, 21050110425
  • New Century Excellent Talents in University. Grant Number: NCET-04-0242
  • Seed Foundation of Tianjin University. Grant Number: 60303002
  • Program of Introducing Talents of Discipline to Universities. Grant Number: B06006

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Keywords:

  • ethanol steam reforming;
  • hydrogen production;
  • oxygen mobility;
  • Ni/CeO2;
  • Mg addition

Abstract

This article describes a strategy for increasing oxygen storage capacity (OSC) of ethanol steam reforming (ESR) catalysts. Sintering and carbon deposition are major defects of nickel-based catalysts for ESR; tuning oxygen mobility (OM) of CeO2-based supports can overcome these drawbacks and promote H2 production. We have successfully increased OSC and OM by adding Mg into the lattice of Ni/CeO2 to promote H2 production in ESR. The insertion of Mg into the CeO2 lattice efficiently promotes the reduction of Ce4+ according to X-ray powder diffraction (XRD) and temperature-programmed reduction (TPR) analysis. Mg-modified Ni/CeO2 catalysts have larger OSC and smaller nickel crystallite size compared with bare Ni/CeO2. The optimal Mg addition is 7 mol % (Ni/7MgCe) with the best OM. We also present evidence indicating that Mg addition significantly promotes ethanol conversion and H2 production in ESR, and that Ni/7MgCe yields the best performance due to the high OM of the support. These Mg-modified catalysts also produce less carbon deposition compared with Ni/CeO2, and the amount of deposited carbon decreases with increasing Mg addition. Ni/7MgCe has the best resistance to carbon deposition owing to the excellent OM. © 2011 American Institute of Chemical Engineers AIChE J, 2012

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