Supported Rh catalysts for methane partial oxidation prepared by OM-CVD of Rh(acac)(CO)2
作者： V. Dal Santo , C. Mondelli , V. De Grandi , A. Gallo , S. Recchia
DOI: 10.1016/J.APCATA.2008.05.013
关键词: Chemistry 、 Partial oxidation 、 Catalysis 、 Inorganic chemistry 、 Syngas 、 Catalyst support 、 Aluminium oxide 、 Heterogeneous catalysis 、 Infrared spectroscopy 、 Chemisorption
摘要: Abstract The organometallics chemical vapour deposition (OM-CVD) technique, using Rh(acac)(CO) 2 as a precursor, was employed for the preparation of heterogeneous Rh catalysts supported on low surface area refractory oxides (α-Al O 3 , ZrO MgO and La ). Prepared systems were tested in methane catalytic partial oxidation (CH 4 -CPO) reaction fixed bed reactor compared to reference catalyst prepared from impregnation (CO) 12 . Catalysts Al show better or comparable performances with respect system. Complete decomposition precursor during formation metal phase under reductive conditions investigated by TPRD confirmed infrared mass spectrometry data. Supported characterized CO H chemisorption, CO-DRIFT spectroscopy HRTEM microscopy fresh aged selected samples. Rh(I) isolated sites Rh(0) particles found catalysts; after ageing an extensive reconstruction occurs mainly consisting sintering isolate but without large increase mean size. Catalytic species balance be dependent support material.
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