Comparing the DBT conversion by using crystalline WS2 and WS2 electron irradiated catalyst
Por:
Rangel R., Alonso G., Adem E., Fuentes S., Galván D.H.
Publicada:
1 ene 1999
Resumen:
A catalytic study has been performed in WS2 irradiated with electrons at 1000 kGy. The purpose is to compare irradiated WS2 with WS2 crystalline in terms of DBT conversion, selectivity and surface area analysis. Also, Scanning Electron Microscope (SEM), X-ray diffraction were performed to show microstructural changes induced by irradiation. We found that DBT conversion increased by 55% if compared with WS2 crystalline. The surface area decreased and the initial rate constants increased by a factor of four times. The selectivity for DCH after irradiation has decreased, while the selectivity for DIF and PCH has increased substantially. The DYH/DHS ratio has decreased in 42%. The SEM micrographs showed that irradiation, at this level, produced certain damage in the crystallinity. The X-ray analysis showed different distribution in the intensity of the principal peaks after irradiation was achieved. This behavior could be correlated to the surface area decrement and the enhancing of the catalytic activity in WS2.
Filiaciones:
Rangel R.:
Programa de Posgrado en Física de Materiales, CICESE, Apartado Postal 2681, C. P. 2280, Ensenada, B. C., Mexico
Alonso G.:
CIMAV, Depto. de Catálisis, Chihuahua, Chih., Mexico
Adem E.:
Instituto de Física, UNAM, Apdo. Postal 20-364, 01000 México, D. F., Mexico
Fuentes S.:
Centro de Ciencias de la Materia Condensada, UNAM, Apdo. Postal 2681, C. P. 22800, Ensenada, B. C., Mexico
Galván D.H.:
Centro de Ciencias de la Materia Condensada, UNAM, Apdo. Postal 2681, C. P. 22800, Ensenada, B. C., Mexico
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