Steam reforming of methane (SRM) is the primary method to produce hydrogen. Commercial Ni-based catalysts have been optimized for SRM with excess steam (H 2O/CH 4>2.5) at high temperatures (>700°C). However, commercial catalysts are not suitable under severe reaction conditions such as stoichiometric steam over methane ratio (H 2O/CH 4=1.0) and low temperature (600°C). In this study, SRM has been carried out at a gas hourly space velocity (GHSV) of 155426h -1 over Ni-Ce (1-x)Zr (x)O 2 catalysts prepared by a co-precipitation method. The CeO 2/ZrO 2 ratio was systematically varied to optimize Ni-Ce (1-x)Zr (x)O 2 catalysts at a H 2O/CH 4 ratio of 1.0 and at 600°C. 15wt.% Ni-Ce 0.8Zr 0.2O 2 exhibited the highest CH 4 conversion as well as stability with time on stream due to high oxygen storage capacity.
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2010-0002521 ).
This work is financially supported by Korea Ministry of Environment (MOE) as “Human resource development Project for Energy from Waste & Recycling”.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment