Tetrahydrothiophene desulfurization on Co-Mo/. gamma. -Al sub 2 O sub 3 : A temporal analysis of products (TAP) investigation

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(91)90219-T· OSTI ID:5598506

Moser, W R; Rossetti, Jr, G A ^[1]; Gleaves, J T; Ebner, J R ^[2]

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1. Worcester Polytechnic Institute, MA (USA)
2. Monsanto Chemical Co., St. Louis, MO (USA)

The catalytic reactions of tetrahydrothiophene, thiophene, 1-butene, 1,3-butadiene, and n-butane with hydrogen were studied at low pressure over a commercial cobalt molybdate catalyst. The formation sequence of tetrahydrothiophene desulfurization products was monitored with submilli-second time resolution using the temporal analysis of products (TAP) transient microreactor technique. The TAP experiments showed that butene and were the only hydrocarbon desulfurization products formed, although rapid dehydrogenation to thiophene was also observed. The exceptional time resolution of the TAP spectrometer provided evidence that the butene formed could not be accounted for by a mechanism involving butadiene hydrogenation. The results suggested a desulfurization mechanism for tetrahydrothiophene wherein C{sub 4} hydrocarbon formation proceeds via a surface butene thiolate intermediate produced by a single {beta}-hydride elimination of the intermediate, while rapid C-S bond hydrogenolysis involving surface hydrogen is responsible for butene formation.

• OSTI ID: 5598506
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 127:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BUTADIENE
BUTENES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT COMPOUNDS
DEHYDROGENATION
DESULFURIZATION
DIENES
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGENATION
KINETICS
MEASURING INSTRUMENTS
MOLYBDATES
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYCYCLIC SULFUR HETEROCYCLES
POLYENES
REACTION INTERMEDIATES
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SPECTROMETERS
THIOPHENE
TRANSITION ELEMENT COMPOUNDS