Ethanol steam reforming over Pt/Al 2 O 3 and Rh/Al 2 O 3 catalysts: The effect of impurities on selectivity and catalyst deactivation

Abstract

Ethanol steam reforming over Pt/Al2O3 and Rh/Al2O3 catalysts: the effect of impurities on selectivity and catalyst deactivation. Applied Catalysis A: General, 529, pp. 98-107. (doi:10.1016General, 529, pp. 98-107. (doi:10. /j.apcata.2016 This is the author's final accepted version.There may be differences between this version and the published version. You are advised to consult the publisher's version if you wish to cite from it. impurities. The addition of 1 mol % C 3 alcohols (1-propanol and isopropyl alcohol)significantly decreased the conversion of ethanol and increased the rate of catalyst deactivation. This deactivation of the catalyst in the presence of C 3 alcohols was attributed to high olefin formation and incomplete decomposition of the C 3 alcohols, which deposited over the catalysts as coke. Propanal, propylamine and acetone addition to the water/ethanol mixture resulted in rapid metal deactivation and a loss of steam reforming activity over the Pt/alumina although ethanol decomposition continued. In contrast the Rh/alumina did not lose all steam reforming activity when acetone and propylamine were added as impurities. On both the catalysts alcoholic impurities produced a large number of carbon nanotubes (CNTs).

The Effect of Noble Metal (M: Ir, Pt, Pd) on M/Ce2O3-γ-Al2O3 Catalysts for Hydrogen Production via the Steam Reforming of Glycerol

“…Moreover, the much improved performance of the Pt/CeAl may be related to: (i) the increased number of Brønsted acid sites (as shown by the TPD experiments), which improved the hydrogenolysis and dehydrogenation-dehydration of condensable intermediates, leading to enhanced H 2 production, and (ii) the smaller metal particle size (electron microscopy analysis), which favours the cleavage of the C-C and C-O bonds in the C 3 H 8 O 3 molecules. These findings are also in agreement with reports concerning the steam reforming of ethanol, which suggest that Pt-based catalysts exhibit higher activity and selectivity towards H 2 production in comparison to other noble metals [94,95].…”

Effect of the Structural and Electronic Properties of Rh/CeXZr1-XO2 Catalysts on the Low-temperature Ethanol Steam-reforming

“…In the past years, there has been continuous research to develop commercial catalysts. Systems such as non-noble (Co, Cu, Ni, Fe) [6][7][8][9][10][11] and noble transition metals (Pt, Pd, and Rh) [11][12][13][14][15][16][17] have been tested in the ESR. From these, Rh has shown to be one of the most promising alternatives since it readily dissociates the ethanol C-C bond.…”

In-Situ Liquid Hydrogenation of m-Chloronitrobenzene over Fe-Modified Pt/Carbon Nanotubes Catalysts

“…The generation of H 2 and CO 2 by ethanol APR is an ideal situation. Pt-based catalysts are a type of noble metal catalysts that can be used in ethanol reforming-based hydrogen preparation [29][30][31][32]. During the hydrogen generation via ethanol reforming on Pt-based catalysts, the O-H and C-H of ethanol needed similar energy, but Pt-C was more stable than Pt-O and more likely to be formed [33,34].…”