Journal
RENEWABLE ENERGY
Volume 42, Issue -, Pages 212-216Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2011.08.013
Keywords
Ni-Ce(1-x)Zr(x)O2; Steam reforming of methane (SRM); Severe reaction conditions; Oxygen storage capacity (OSC)
Funding
- National Research Foundation of Korea [2010-0002521, 핵C6B1608] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Steam reforming of methane (SRM) is the primary method to produce hydrogen. Commercial Ni-based catalysts have been optimized for SRM with excess steam (H2O/CH4 > 2.5) at high temperatures (>700 degrees C). However, commercial catalysts are not suitable under severe reaction conditions such as stoichiometric steam over methane ratio (H2O/CH4 = 1.0) and low temperature (600 degrees C). In this study, SRM has been carried out at a gas hourly space velocity (GHSV) of 155426 h(-1) over Ni-Ce((1-x))Z((x))O(2) catalysts prepared by a co-precipitation method. The CeO2/ZrO2 ratio was systematically varied to optimize Ni-Ce(1-x)Zr(x)O2 catalysts at a H2O/CH4 ratio of 1.0 and at 600 degrees C. 15 wt.% Ni-Ce0.8Zr0.2O2 exhibited the highest CH4 conversion as well as stability with time on stream due to high oxygen storage capacity. (C) 2011 Elsevier Ltd. All rights reserved.
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