A novel effect of phosphorus addition on the activity of dispersed molybdenum-based catalysts in heavy oil hydrotreatment
- National Research Inst. for Pollution and Resources, 16-3 Onogawa, Tsukuba, Ibaraki 305 (JP)
This paper reports on the effect of phosphorous addition on the hydrodesulfurization activity of in situ formed dispersed Mo-Co-S catalysts evaluated for five different heavy oils. The hydrotreating experiments were carried out by using an autoclave of 300-mL capacity at a reaction temperature of 430{degrees} C. It was found that the sulfur removal goes through a maximum with increasing phosphorous addition for each heavy oil and that the amount of added phosphorous at the maximum is closely related to the vanadium content of the heavy oils. In addition, the increment of sulfur removal attainable by phosphorous addition was found to be larger for the heavy oils of higher vanadium content. These phenomena were reasonably explained by assuming the formation of oil-insoluble P-V compounds and their separation from the active Mo-Co-S catalyst phases and also by the poisoning effect of excess phosphorous.
- OSTI ID:
- 6083142
- Journal Information:
- Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 30:1; ISSN 0888-5885; ISSN IECRE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALLOYS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DESULFURIZATION
DISPERSIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCRACKING
HYDROGENATION
METALS
MOLYBDENUM
PETROLEUM
PHOSPHORUS ADDITIONS
PYROLYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
VANADIUM