ISSN:
0268-2575
Keywords:
supported amorphous NiB alloy
;
hydrogenation of cyclopentadiene
;
catalytic activity
;
crystal support and its modification
;
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Amorphous nickel-boron alloys supported on α-alumina (NiB/Al2O3) and on titania-modified α-alumina (NiB/TMA) with titania loadings ranging from 1·25 to 10 wt% were prepared by a reductive impregnation method, which resulted in a highly dispersed NiB amorphous alloy on the support. When used as catalysts for partial hydrogenation of cyclopentadiene to cyclopentene in a flow fixed-bed reactor at atmospheric pressure, the NiB/Al2O3 showed higher activity than Ni/Al2O3 and Pd/Al2O3 but the NiB/TMA with 5 wt% of titania loading (NiB/TMA5) showed the highest activity of all for the production of cyclopentene in a temperature range of 80-200°C with 10 g gcat-1 h-1 of cyclopentadiene feed. The maximum yield of cyclopentene was 97% on NiB/TMA5, 92% on NiB/Al2O3, 60% on Ni/Al2O3 and 23% on Pd/Al2O3, respectively. The catalytic stability of the amorphous NiB/TMA5 was also excellent with time on stream. The catalyst samples were characterized by ICP, XRD, XPS, BET, TEM and O2 adsorption. The probable modification mechanism is discussed. © 1998 SCI
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
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