Abstract
The goal of this study was to investigate Cr-free, Fe/Ni, metal oxide catalysts for the high temperature shift (HTS) reaction of a fuel processor using liquefied natural gas (LNG). As hexavalent chromium (Cr6+) in commercial HTS catalyst is a hazardous material, we selected Ni as a substitute for chromium in the Fe-based HTS catalyst and investigated the HTS activities of these Cr-free, metal oxide catalysts under the LNG reformate condition. Cr-free, Fe/Ni-based catalysts containing Ni instead of Cr were prepared by coprecipitation and their performance was evaluated under a gas mixture condition (56.7% H2, 10% CO, 26.7% H2O, and 6.7% CO 2) that simulated the gas composition from a steam methane reformer (SMR, at H2O/CH4 ratio = 3 with 100% CH4 conversion). Under this condition, the Fe/Ni catalysts showed higher CO removal activities than Fe-only and Cr-containing catalysts, but the methanation was promoted when the Ni content in the catalyst exceeded 50 wt%. Brunner-Emmett-Teller (BET), X-ray diffraction (XRD), inductively coupled plasma (ICP) and X-ray photoelectron spectroscopy (XPS) analyses were performed to explain the HTS activity of the Fe/Ni catalysts based on the catalyst structure.
Original language | English |
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Pages (from-to) | 8173-8180 |
Number of pages | 8 |
Journal | International Journal of Hydrogen Energy |
Volume | 36 |
Issue number | 14 |
DOIs | |
Publication status | Published - 2011 Jul |
Bibliographical note
Funding Information:The authors gratefully acknowledge the financial support provided by the Seoul Development Institute (SDI) through Seoul R&BD program (10575).
Funding Information:
Dr. Dae-Won Lee was supported by Korea University Grant.
Keywords
- Cr-free catalyst
- Fe/Ni catalyst
- High temperature shift reaction
- Hydrogen production
- Steam methane reforming
- Water gas shift reaction
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology