Ru-based catalysts for CO selective methanation reaction in H2-rich gases

被引:47
作者
Djinovic, Petar [1 ,2 ]
Galletti, Camilla [1 ]
Specchia, Stefania [1 ]
Specchia, Vito [1 ]
机构
[1] Politecn Torino, Dept Mat Sci & Chem Engn, I-10129 Turin, Italy
[2] Natl Inst Chem, Lab Catalysis & Chem React Engn, SI-1001 Ljubljana, Slovenia
关键词
H-2; clean-up; Selective methanation; Ru-based catalysts; Ceria; Alumina; CARBON-MONOXIDE; FUEL PROCESSOR; COMBUSTION SYNTHESIS; HYDROGEN-PRODUCTION; PURIFICATION; OXIDES; ATR;
D O I
10.1016/j.cattod.2010.11.007
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Even traces of CO in the hydrogen-rich gas fed to PEM-FCs can poison the platinum anode electro-catalyst and dramatically decrease the stack power. The CO selective methanation (CO-SMET) process seems to be a good alternative to the CO preferential oxidation (CO-PROX) one for PEM-FCs applications to vehicles, boats, yachts and residential co-generators, as a CO-SMET reactor is inherently easier to control than the CO-PROX one. The present paper deals with the study on complete removal of CO in H-2-rich gas stream from a reforming process through CO-SMET over Ru-based catalysts supported on Al2O3 and CeO2 carriers. All the catalysts, with Ru load of 1%, 3% and 5%, were prepared by a conventional impregnation method, using two different Ru precursors, chloride and nitrate, and their CO removal performance was determined at the powder level in a fixed bed micro reactor. The Al2O3 carrier exhibited performances better than the CeO2 one, in particular when Ru was deposited from RuCl3 precursor. The best performance was obtained with 5% Ru-Al2O3-Cl as the temperature range of complete CO conversion with acceptably low levels of CO2 methanation (<= 50% of CO molar methanation) was the widest. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:282 / 287
页数:6
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