Title
Preparation of MoS2 catalysts by in situ decomposition of tetraalkylammonium thiomolybdates
Date Issued
13 August 1998
Access level
metadata only access
Resource Type
journal article
Author(s)
Facultad de Ciencias Químicas
Publisher(s)
Elsevier
Abstract
Molybdenum tetraalkylammonium thiosalts were used as precursors for the in situ formation of MoS2 catalysts for dibenzothiophene hydrodesulfurization. The influence of the chemical composition of precursors (R4N)2MoS4 with R=H+, CH+3 or C4H+9 and mechanical pressing of precursors on the composition and activity of prepared catalysts was investigated. The change of cation from proton to methyl- and to butylammonium increased the surface area and HDS activity of MoS2 catalysts. Extremely high surface area surpassing 200 m2/g was obtained for catalysts formed from tetrabutylammonium thiomolybdate. Significant difference was observed for pattern of thermal decomposition of alkylammonium thiosalts compared to ammonium ones. Unusual sponge-like morphology by reason of appearance of secondary porosity was observed in the case of tetrabutylammonium precursors. © 1998 Elsevier Science B.V. All rights reserved.
Start page
117
End page
122
Volume
43
Issue
February 1
Language
English
OCDE Knowledge area
Ingeniería de materiales
Subjects
Scopus EID
2-s2.0-0000440703
Source
Catalysis Today
ISSN of the container
09205861
Sponsor(s)
Many fruitful discussions during the course of this work with Dr. N. Bogdanchikova, Dr. L. Morales and Dr. M. Farias are gratefully acknowledged. The authors appreciate valuable technical assistance of I. Gradilla, G. Soto, J. Nieto, M.E. Aparicio and O.I. Lepe. The present work has been financially supported by DGAPA-UNAM, through grant No. IN-107696. G. Alonso acknowledges fellowship support from CONACYT. The research work of V. Petranovskii at CICESE is supported by DAIC-CONACYT through the `Cátedra Patrimonial' No. 960021.
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