Abstract
A comparative study between monometallic (Me-CeO2, Me = Zn, Cu, Fe and Co) and Ni-doped bimetallic (Me-Ni-CeO2) catalysts has been performed in the high temperature water-gas shift (HT-WGS) reaction using waste derived synthesis gas. Experimental results revealed that Me-Ni-CeO2 exhibited higher catalytic performance than simple Me-CeO2 catalysts. Within the Me-Ni-CeO2 series, Co-Ni-CeO2 exhibited excellent and stable catalytic performance (CO conversion > 90%) at a very high GHSV of 143,000 h-1. The existence of high concentration of Ce3+ ions and oxygen vacancies on the catalyst surface were responsible for the increased WGS activity of Co-Ni-CeO2. In addition, Co-Ni-CeO2 maintains a stable performance for 50 h. However, commercial Fe2O3-Cr2O3 catalyst showed a steep decline from their initial CO conversion values 15-10% within 5 h.
Original language | English |
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Pages (from-to) | 21-31 |
Number of pages | 11 |
Journal | Applied Catalysis A: General |
Volume | 522 |
DOIs | |
Publication status | Published - 2016 Jul 25 |
Bibliographical note
Funding Information:This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science , ICT and Future Planning ( 2013R1A1A1A05007370 ).
All Science Journal Classification (ASJC) codes
- Catalysis
- Process Chemistry and Technology