Selective CO methanation in CO2-rich H2 atmospheres over a Ru/zeolite catalyst: The influence of catalyst calcination
作者： Ali M. Abdel-Mageed , S. Eckle , H.G. Anfang , R.J. Behm
DOI: 10.1016/J.JCAT.2012.11.001
关键词:
摘要: Abstract The pre-treatment of highly active and selective Ru/zeolite catalysts for the CO methanation in 2 -rich H atmospheres involves a calcination step before catalyst activation to reach their high activity selectivity. In this study, we investigated impact procedure on 2.2 wt.% by evaluating resulting changes structure reaction characteristics combined kinetic, situ extended X-ray absorption fine (EXAFS) diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements. Calcination synthetic air, followed standard gas, results decrease mean Ru particle size with increasing temperature, from ∼1.5 nm ∼1.0 nm. increase dispersion goes along distinct selectivity at extremely low concentrations (100 ppm). Possible mechanisms physical origin responsible these are discussed.
elsevier.com
sci-hub.se 参考文章(43)
P. Reyes, M.E. König, G. Pecchi, I. Concha, M. López Granados, J.L.G. Fierro, o-xylene hydrogenation on supported ruthenium catalysts Catalysis Letters. ,vol. 46, pp. 71- 75 ,(1997) , 10.1023/A:1019002114936
T.J. McCarthy, C.M.P. Marques, H. Treviño, W.M.H. Sachtler, Suppressed hydrogen chemisorption of zeolite encaged metal clusters: discrimination between theoretical models on the basis of Ru/NaY Catalysis Letters. ,vol. 43, pp. 11- 18 ,(1997) , 10.1023/A:1018942623229
D.C. Koningsberger, B.L. Mojet, G.E. van Dorssen, D.E. Ramaker, XAFS spectroscopy; fundamental principles and data analysis Topics in Catalysis. ,vol. 10, pp. 143- 155 ,(2000) , 10.1023/A:1019105310221
D.J Duvenhage, N.J Coville, Fe:Co/TiO2 bimetallic catalysts for the Fischer–Tropsch reaction Applied Catalysis A-general. ,vol. 233, pp. 63- 75 ,(2002) , 10.1016/S0926-860X(02)00118-7
Camilla Galletti, Stefania Specchia, Guido Saracco, Vito Specchia, CO-selective methanation over Ru–γAl2O3 catalysts in H2-rich gas for PEM FC applications Chemical Engineering Science. ,vol. 65, pp. 590- 596 ,(2010) , 10.1016/J.CES.2009.06.052
Petar Djinović, Camilla Galletti, Stefania Specchia, Vito Specchia, Ru-based catalysts for CO selective methanation reaction in H2-rich gases Catalysis Today. ,vol. 164, pp. 282- 287 ,(2011) , 10.1016/J.CATTOD.2010.11.007
Wolfgang Lubitz, William Tumas, Hydrogen: an overview. Chemical Reviews. ,vol. 107, pp. 3900- 3903 ,(2007) , 10.1021/CR050200Z
S.T. Yong, K. Hidajat, S. Kawi, Reaction study of auto thermal steam reforming of methanol to hydrogen using a novel nano CuZnAl-catalyst Journal of Power Sources. ,vol. 131, pp. 91- 95 ,(2004) , 10.1016/J.JPOWSOUR.2004.01.027
M. G. Evans, M. Polanyi, Inertia and driving force of chemical reactions Transactions of The Faraday Society. ,vol. 34, pp. 11- 24 ,(1938) , 10.1039/TF9383400011
Marc Audier, Jacek Klinowski, Robert E. Benfield, High molecular hydrocarbons from the Fischer–Tropsch process with a pre-oxidized ruthenium zeolite catalyst Journal of The Chemical Society, Chemical Communications. pp. 626- 628 ,(1984) , 10.1039/C39840000626