TPD and HYD studies of unpromoted and co-promoted molybdenum sulfide catalyst ex ammonium tetrathiomolybdate

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1995.1317· OSTI ID:224022

Zhang, F; Vasudevan, P T ^[1]

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1. Univ. of New Hampshire, Durham, NH (United States)

Activity measurements of an unpromoted molybdenum sulfide catalyst prepared by the decomposition of ammonium tetrathiomolybdate (ATTM) indicate that the catalyst exhibits a higher HYD activity than a catalyst prepared by the conventional method of reductive sulfiding of the oxide, as well as a commercial catalyst. The increased activity can be attributed to a valence state of molybdenum lower than 4 in the supported sulfide catalyst and a concomitant increase in the number of anion vacancies as determined by TPD studies. The results also indicate that the addition of a promoter Co to ATTM results in higher HDS, but not higher HYD activity of the catalyst. 30 refs., 9 figs., 2 tabs.

• OSTI ID: 224022
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 157; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
02 PETROLEUM
40 CHEMISTRY
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
COBALT
DESORPTION
DESULFURIZATION
HYDROGENATION
MOLYBDENUM SULFIDES
VALENCE