Monometallic Pd and Pt and Bimetallic Pd-Pt/Al 2 O 3 -TiO 2 for the HDS of DBT: Effect of the Pd and Pt Incorporation Method

The effect of the preparation method of monometallic Pd and Pt and bimetallic Pd-Pt/Al 2 O 3 -TiO 2 catalysts on the hydrodesulfurization (HDS) of dibenzothiophene (DBT) was investigated in this study. The synthesis was accomplished using three methods: (A) impregnation, (B) metal organic chemical v...

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Bibliographic Details
Published in:Journal of chemistry 2014, Vol.2014, p.1-10
Main Authors: Martínez Guerrero, Reynaldo, Hernández-Gordillo, Agileo, Santes, Víctor, Vargas García, Jorge Roberto, Escobar, José, Díaz-García, Leonardo, Díaz Barriga Arceo, Lucía, Garibay Febles, Vicente
Format: Article
Language:English
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Summary:The effect of the preparation method of monometallic Pd and Pt and bimetallic Pd-Pt/Al 2 O 3 -TiO 2 catalysts on the hydrodesulfurization (HDS) of dibenzothiophene (DBT) was investigated in this study. The synthesis was accomplished using three methods: (A) impregnation, (B) metal organic chemical vapor deposition (MOCVD), and (C) impregnation-MOCVD. The bimetallic Pd-Pt catalyst prepared by the impregnation-MOCVD method was most active for the HDS of DBT compared to those prepared by the single impregnation or MOCVD method due to the synergetic effect between both noble metals. The greater selectivity toward biphenyl indicated that this bimetallic Pd-Pt catalyst preferentially removes sulfur via the direct desulfurization mechanism. However, the bimetallic Pd-Pt catalyst prepared using the single MOCVD method did not produce any cyclohexylbenzene, which is most likely associated with the hydrogenation/dehydrogenation sites.
ISSN:2090-9063
2090-9071
DOI:10.1155/2014/679281