Cyclohexene hydrogenation with molybdenum disulfide catalysts prepared by ex situ decomposition of ammonium thiomolybdate-cetyltrimethylammonium thiomolybdate mixtures
Por:
Romero-Rivera R., Del Valle, A, Alonso G., Flores E., Castillón F., Fuentes S., Cruz-Reyes J.
Publicada:
30 ene 2008
Resumen:
Ammonium tetrathiomolybdate (ATTM) is treated with cetyltrimethylammonium chloride (CTAC) using several ATTM/CTAC ratios. Reaction of ATTM with the limiting reagent CTAC gives the carbon-containing compound cetyltrimethylammonium tetrathio-molybdate (CTAT), resulting in different ATTM-CTAT mixtures or precursors which are then decomposed in N-2 at 723 K, yielding mesoporous samples with surface areas of over 260 m(2)/g. Analysis by XRD and electron microscopy correspond to a well dispersed MoS2-2H phase. The activity of the catalysts is tested in a batch reactor for cyclohexene hydrogenation, where those prepared from ATTM-CTAT precursors are up to seven times more active than the catalyst obtained by thermal decomposition of pure ATTM. The enhanced catalytic activity of these catalysts is attributed to a sulfide phase containing structural carbon. (C) 2007 Elsevier B.V. All rights reserved.
Filiaciones:
Romero-Rivera R.:
Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Tijuana, BC, Mexico
Alonso G.:
Depto de Catálisis, Centro de Investigación en Materiales Avanzados, Chihuahua, Chih., Mexico
Flores E.:
Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, Mexico
Castillón F.:
Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, Mexico
Fuentes S.:
Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, Mexico
Cruz-Reyes J.:
Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Tijuana, BC, Mexico
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