期刊
CERAMICS INTERNATIONAL
卷 42, 期 6, 页码 7462-7474出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.01.151
关键词
Cobalt-cerium oxides; Freeze-drying method; CO-PROX reaction
资金
- Ministerio de Economia y Competitividad, Spain [CTQ2012-37925-C03-03, MAT2013-42407]
- FEDER Funds [CTQ2012-37925-C03-03, MAT2013-42407]
- Junta de Andalucia, Spain [P12.RNM.1565]
A synthesis method in two steps was used to obtain Co3O4-CeO2 (COCE) catalysts. Firstly, freeze-drying precursors to obtain a submicrometric ceria powders support were calcined at a temperature as low as 400 degrees C. Then, the support was impregnated with a Co(II) acetate solution by incipient wetness impregnation, varying the loading of Co between 5 and 20 wt%, and calcined again at 400 degrees C. xCOCE samples were tested for the preferential oxidation of CO in a H-2-rich stream (CO-PROX). All samples showed catalytic activity and high selectivity towards CO2 at low reaction temperatures, being 15COCE the most active catalyst. Moreover, simulating a CO-PROX unit operation, the influence of the presence of CO2 and H2O in the feed was tested, showing a high activity and selectivity mainly to CO2. 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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