期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 3, 期 8, 页码 2130-2139出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cy00154g
关键词
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资金
- National Natural Science Foundation of China [20803006]
- Chinese Ministry of Education via the Program for New Century Excellent Talents in University [NCET-12-0079]
- Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur Autonomous Region, Xinjiang University [XJDX0908-2011-10]
- Fundamental Research Funds for the Central Universities [DUT12LK51]
Mesostructured CoxCe0.85Zr0.15MnyO epsilon composites were firstly prepared by a simple one-pot surfactant-assisted co-precipitation (SACP) method and then employed to catalyze the CO preferential oxidation (CO PROX) reaction in an H-2-rich stream. Effects of the Co and Mn contents (x and y, respectively) in the formula, as well as the presence of H2O and CO2 in feed were investigated. The as-synthesized Co0.4Ce0.85Zr0.15Mn0.10O epsilon catalyst showed excellent catalytic performance in the CO PROX reaction: 100% CO conversion could be observed in a wide temperature range of 140-200 degrees C; even in the simulated syngas, the almost complete CO removal could still be achieved at 175-225 degrees C; no obvious change in both CO conversion and CO2 selectivity over the catalyst took place during the CO PROX process with simulated syngas as feed. N-2 physisorption (BET), temperature-programmed reduction (TPR), X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopic (XPS) characterization techniques were employed to reveal the relationship between the catalyst nature and catalytic performance. The outstanding catalytic performance in CO PROX reaction was remarkably dependent on a larger specific surface area, more reducible Co3+ and the high dispersity of the Co3O4, affected by the Co and Mn contents through strong Co-Ce-Zr-Mn interactions. The mesostructured Co0.4Ce0.85Zr0.15Mn0.10O epsilon catalyst prepared by the simple one-pot SACP protocol can be a promising candidate for CO PROX reaction in excess H-2.
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