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Investigation of the Inhibiting Role of Hydrogen in the Steam Reforming of Methanol
Author(s) -
Gac Wojciech,
Zawadzki Witold,
Greluk Magdalena,
Słowik Grzegorz,
Machocki Andrzej,
Papavasiliou Joan,
Avgouropoulos George
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900738
Subject(s) - catalysis , steam reforming , methanol , hydrogen , inorganic chemistry , chemistry , water gas shift reaction , diffuse reflectance infrared fourier transform , hydrogen production , syngas , oxide , desorption , selectivity , copper , zinc , copper oxide , adsorption , organic chemistry , photocatalysis
Steam reforming of methanol (SRM) was investigated over palladium zinc oxide catalyst modified with chromium, copper supported on alumina modified manganese oxide and commercial copper catalyst supported on zinc oxide modified with alumina. These catalysts showed high activity and selectivity towards hydrogen and carbon dioxide at low reaction temperatures. Temperature‐programmed desorption, diffuse reflectance infrared Fourier‐transform spectroscopy and catalytic performance studies, indicated that the presence of hydrogen in the gas stream influenced the course of SRM reaction. Such effects were related to hydrogen concentration over the catalysts, the reaction temperature and also the type of catalyst. Semi‐kinetic catalytic studies evidenced that an increase in hydrogen concentration in gas stream led to the decrease of methanol conversion at low‐reaction temperatures and decrease of selectivity to CO 2 at high reaction temperatures. It was pointed out that strong interactions of hydrogen with the surface of catalysts may retard transformation of surface species into the SRM products.