Oxide-supported Rh catalysts for H2 generation from low-temperature ethanol steam reforming: effects of support, Rh precursor and Rh loading on catalytic performance

Rh4(CO)12-derived Rh/CeO2 is superior to the other oxide-supported Rh catalysts. Coking is the only cause of catalyst deactivation which affects the catalytic stability of Rh/CeO2. Both CeO2-supported Rh0 and Rh+ may participate in catalysis for ESR.

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Synthesis of Catalytic Ni/Cu Nanoparticles from Simulated Wastewater on Li–Al Mixed Metal Oxides for a Two-Stage Catalytic Process in Ethanol Steam Reforming: Catalytic Performance and Coke Properties

Catalysts ◽

10.3390/catal11091124 ◽

2021 ◽

Vol 11 (9) ◽

pp. 1124

Author(s):

Yu-Jia Chen ◽

Song-Hui Huang ◽

Jun-Yen Uan ◽

Hao-Tung Lin

Keyword(s):

Steam Reforming ◽

Catalytic Performance ◽

Ethanol Steam Reforming ◽

Two Stage ◽

H2 Generation ◽

Structured Catalyst ◽

Carbon Filaments ◽

Nano Catalysts ◽

Double Hydroxide ◽

Ethanol Steam

This work recovered Ni or Cu cations from simulated electroplating wastewater to synthesize Ni/Cu nano-catalysts for H2 generation by ethanol steam reforming (ESR). Aluminum lathe waste was used as a framework to prepare the structured catalyst. Li–Al–CO3 layered double hydroxide (LDH) was electrodeposited on the surface of the framework. The LDH was in a platelet-like structure, working as a support for the formation of the precursor of the metal catalysts. The catalytic performance and the coke properties of a 6Cu_6Ni two-stage catalyst configuration herein used for ESR catalytic reaction were studied. The Cu–Ni two-stage catalyst configuration (6Cu_6Ni) yielded more H2 (~10%) than that by using the Ni-based catalyst (6Ni) only. The 6Cu_6Ni catalyst configuration also resulted in a relatively stable H2 generation rate vs. time, with nearly no decline during the 5-h reaction. Through the pre-reaction of ethanol-steam mixture with Cu/LiAlO2 catalyst, the Ni/LiAlO2 catalyst in the 6Cu_6Ni catalyst configuration could steadily decompose acetaldehyde, and rare acetate groups, which would evolve condensed coke, were formed. The Ni nanoparticles were observed to be lifted and separated by the carbon filaments from the support and had no indication of sintering, contributing to the bare deactivation of the Ni/LiAlO2 catalyst in 6Cu_6Ni.

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Catalyst deactivation and regeneration in low temperature ethanol steam reforming with Rh/CeO2–ZrO2 catalysts

Catalysis Letters ◽

10.1007/s10562-006-0082-2 ◽

2006 ◽

Vol 110 (1-2) ◽

pp. 1-6 ◽

Cited By ~ 84

Author(s):

Hyun-Seog Roh ◽

Alexandru Platon ◽

Yong Wang ◽

David L. King

Keyword(s):

Low Temperature ◽

Steam Reforming ◽

Catalyst Deactivation ◽

Ethanol Steam Reforming ◽

Ethanol Steam

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Hydrogen Production from Ethanol Steam Reforming over Co-Ni/CeO2 Catalysts Prepared by Coprecipitation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.724-725.729 ◽

2013 ◽

Vol 724-725 ◽

pp. 729-734 ◽

Cited By ~ 1

Author(s):

Rui Qi Dai ◽

Ya Zhong Chen ◽

Fang Jin ◽

Peng Cui

Keyword(s):

Low Temperature ◽

Steam Reforming ◽

Fine Particles ◽

Nickel Content ◽

Catalytic Performance ◽

Ethanol Steam Reforming ◽

Hydrogen Yield ◽

Nickel Incorporation ◽

Ethanol Steam ◽

Catalytic Performances

Co/CeO2 catalysts showed good catalytic performances in terms of activity, selectivity and stability for intermediate temperature ethanol steam reforming, while low temperature activity should be improved. Thus, effect of nickel incorporation into Co/CeO2 catalysts for ethanol steam reforming was investigated on the consideration of high activity for CC bond cleavage at low temperature of nickel, while cobalt may improve yield of hydrogen due to the depression of CH4 formation. A series of Co-Ni/CeO2 catalysts were prepared by coprecipitation, characterized by low temperature N2 adsorption, X-ray diffraction, temperature programmed reduction, and catalytic performance measurement for ethanol steam reforming. The results indicated that 10.0% nickel incorporation into Co/CeO2 resulted in much better catalytic performances, complete conversion of ethanol into C1 species and hydrogen yield about 60.0% at 350°C were obtained. Further increase of nickel content decreased catalytic performance. The high performance of the Co10-Ni10/CeO2 was attributed to enhancement of surface Ce4+ reduction and fine particles of metal.

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