Presulfiding coal liquid hydrodesulfurization catalysts
At present, one active area in the production of synthetic fuels from coal is the production of valuable liquid fuels. Some coal liquefaction processes under consideration may require secondary hydrotreatment with hydrodesulfurization as an important step in upgrading the coal-derived liquids. The role of cobalt and molybdenum sulfides in HDS catalysts has drawn the attention of many people. In the petroleum industry, the HDS activity of Co--Mo alumina catalysts is usually attributed to the sulfided species; and catalyst presulfiding is considered necessary for obtaining increased activity. From the work done with these catalysts, the following conclusions can be drawn: (1) The total amount of H/sub 2/S supplied during catalyst presulfiding has an effect on the catalyst activity. (2) Relatively less amount (below stoichiometric quantities) of H/sub 2/S supplied results in lower activity of the catalyst. (3) Treatment of the sulfided catalyst with pure H/sub 2/ results in decreased activity of the catalyst. (4) During an operation, the catalyst does become sulfided until it reaches a maximum activity which in turn depends on the initial activity. (5) Care must be taken to adequately presulfide a catalyst to achieve a higher initial and subsequent activity.
- Research Organization:
- Oklahoma State Univ., Stillwater
- OSTI ID:
- 6529397
- Journal Information:
- Coal Process. Technol.; (United States), Journal Name: Coal Process. Technol.; (United States) Vol. 3; ISSN CPRTD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrodesulfurization. IV. The effects of the feed components on Co-Mo-Al/sub 2/O/sub 3/ catalyst activation
Experience reveals best presulfiding techniques for HDS catalysts. [Hydrodesulfurization catalysts]
Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ANTHRACENE
AROMATICS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
COBALT COMPOUNDS
COBALT OXIDES
COED PROCESS
CONDENSED AROMATICS
DESULFURIZATION
ELEMENTS
HYDROCARBONS
HYDROGENATION
LIQUEFACTION
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REMOVAL
SULFUR
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS