The preferential oxidation of CO in hydrogen rich streams over platinum doped nickel oxide catalysts
作者： Ziyaad Mohamed , Venkata D.B.C. Dasireddy , Sooboo Singh , Holger B. Friedrich
DOI: 10.1016/J.APCATB.2015.07.012
关键词:
摘要: Abstract NiO/Al 2 O 3 , Pt/Al and Pt/NiO/Al catalysts were prepared by the incipient wetness technique with a Ni loading of 25 wt% Pt 0.5 wt%. These characterized ICP-OES, XRD, BET, TPR, N adsorption–desorption isotherms, CO chemisorption, FTIR-CO, XPS, SEM-EDX TEM. XRD XPS results showed presence NiO PtO phases on respective supports in situ redox reactions that underwent reversible phase changes (oxide metallic) stable. FTIR-CO studies containing samples exhibited both linear bridged adsorption higher intensities observed for catalyst. The tested oxidation H rich streams (preferential oxidation-PROX) continuous flow fixed bed stainless steel reactor. catalyst produced very low conversions stipulated PROX temperature range highest conversion 11% selectivity 25% toward . improved activity within 56% 68% at 200 °C. revealed synergistic effects, obtaining much ranges compared to mono-metallic catalysts. conversion, 99.9%, this was 200 °C, 72.8% using C:O ratio 1:2.
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sci-hub.se 参考文章(45)
Matthew M. Yung, Zhongkui Zhao, Matthew P. Woods, Umit S. Ozkan, Preferential oxidation of carbon monoxide on CoOx/ZrO2 Journal of Molecular Catalysis A-chemical. ,vol. 279, pp. 1- 9 ,(2008) , 10.1016/J.MOLCATA.2007.09.026
Gregorio Marbán, Teresa Valdés-Solís, Towards the hydrogen economy International Journal of Hydrogen Energy. ,vol. 32, pp. 1625- 1637 ,(2007) , 10.1016/J.IJHYDENE.2006.12.017
Elwathig A. Elkhalifa, Holger B. Friedrich, On the Effect of Hydrocarbon/Oxygen Ratios During the Dehydrogenation of n -Octane Over a VMgO Catalyst Catalysis Letters. ,vol. 141, pp. 554- 564 ,(2011) , 10.1007/S10562-010-0487-9
Chiuping Li, Yu-Wen Chen, Temperature-programmed-reduction studies of nickel oxide/alumina catalysts: effects of the preparation method Thermochimica Acta. ,vol. 256, pp. 457- 465 ,(1995) , 10.1016/0040-6031(94)02177-P
P. Salagre, J.L.G. Fierro, F. Medina, J.E. Sueiras, Characterization of nickel species on several γ-alumina supported nickel samples Journal of Molecular Catalysis A: Chemical. ,vol. 106, pp. 125- 134 ,(1996) , 10.1016/1381-1169(95)00256-1
Y.P. Gavin Chua, G.T. Kasun Kalhara Gunasooriya, Mark Saeys, Edmund G. Seebauer, Controlling the CO oxidation rate over Pt/TiO2 catalysts by defect engineering of the TiO2 support Journal of Catalysis. ,vol. 311, pp. 306- 313 ,(2014) , 10.1016/J.JCAT.2013.12.007
F CIPITI, V RECUPERO, Design of a CO preferential oxidation reactor for PEFC systems: A modelling approach Chemical Engineering Journal. ,vol. 146, pp. 128- 135 ,(2009) , 10.1016/J.CEJ.2008.09.004
S.H. Oh, R.M. Sinkevitch, Carbon Monoxide Removal from Hydrogen-Rich Fuel Cell Feedstreams by Selective Catalytic Oxidation Journal of Catalysis. ,vol. 142, pp. 254- 262 ,(1993) , 10.1006/JCAT.1993.1205
O POZDNYAKOVA, D TESCHNER, A WOOTSCH, J KROHNERT, B STEINHAUER, H SAUER, L TOTH, F JENTOFT, A KNOPGERICKE, Z PAAL, Preferential CO oxidation in hydrogen (PROX) on ceria-supported catalysts, part I: Oxidation state and surface species on Pt/CeO2 under reaction conditions Journal of Catalysis. ,vol. 237, pp. 1- 16 ,(2006) , 10.1016/J.JCAT.2005.10.014