Characterization and activity test of commercial Ni/Al2O3, Cu/ZnO/Al2O3 and prepared Ni–Cu/Al2O3 catalysts for hydrogen production from methane and methanol fuels

Abstract

Khzouz, M. et al. (2013). Characterization and activity test of commercial Ni/Al203, Cu/ZnO/Al203 and prepared NieCu/Al203 catalysts for the hydrogen production from methane and methanol fuels. A comprehensive comparison between these two fuels is established in terms of reaction conditions, fuel conversion, H2 selectivity, CO2 and CO selectivity. The prepared catalyst showed low selectivity for CO in both fuels and it was more selective to H2, with H2 selectivities of 99% in methane and 89% in methanol reforming reactions. A significant objective is to develop catalysts which can operate at lower temperatures and resist deactivation. Methanol steam reforming is carried out at a much lower temperature than methane steam reforming in prepared and commercial catalyst (275-325 o C). However, methane steam reforming can be carried out at a relatively low temperature on NieCu catalyst (600-650 o C) and at higher temperature in commercial methane reforming catalyst (700-800 o C). Commercial Ni/Al2O3 catalyst resulted in high coke formation (28.3% loss in mass) compared to prepared NieCu/Al2O3 (8.9%) and commercial Cu/ZnO/Al2O3 catalysts (3.5%).

Influence of copper on nickel-based catalysts in the conversion of glycerol

“…Previous work dealing with TPR studies on the reduction of Ni-Cu/y-Al 2 O 3 catalysts suggested that the addition of Cu to Ni precursors can dramatically decrease the reducing temperature of Ni oxides, and might markedly enhance the reducibility of the mixed oxide catalysts [23,38,39]. The promotion effect was stronger as the amount of Cu introduced increased [40][41][42].…”

Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

“…It has been reported that the introduction of Cu in the catalyst formulation suppresses coke deposition and the sintering of the active phase, in steam/dry reforming of hydrocarbons [44][45][46][47][48][49][50]. Fornasiero et al [45] have comprehensively studied the methanol and ethanol steam reforming activity of a series of Ni x Cu y /Al 2 O 3 catalysts prepared by wet-impregnation method.…”

Fabrication of porcelain foam substrates coated with SiC, Ni, and Cr using the dip-coating technique

“…Several studies have suggested the use of thick coating or secondary coating as solution to overcome this problem [15,23,24]. 8 No significant weight change was observed during the initial test for the sponge as presented in [25]. However, it started to decompose in a two-step manner with an obvious steep decrease at approximately 250-330 ºC due to the decomposition of urethane bonds; the second decrease happened between 350 ºC and 420 ºC, attributed to loss of ester groups [26].…”

“…Besides that, oxide (Al 2 O 3 ) and base metal catalyst (Ni/SiC and Ni/Al 2 O 3 ) were previously used in partial oxidation of methane [7,8].…”