Catalyst for hydrodesulfurization of petroleum residua

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Catal. Rev. - Sci. Eng.; (United States)

DOI:https://doi.org/10.1080/03602457708079638· OSTI ID:6983991

Ohtsuka, T

Obtaining extremely low sulfur heavy fuel oil requires hydrodesulfurization of residua. Since catalyst function is the crucial point in this process, recent research on the physical properties of catalyst, centered, in particular, on pore structure, was surveyed with the objective of raising catalyst performance. Enhancement of catalyst activity is being attempted by consideration of pore size distribution from the size of molecules of sulfur compounds, asphaltene, etc. For desulfurization, catalyst having pore size of approximately 100 A increases selectivity; for deasphaltening, even larger pore size increases selectivity. Catalyst having abundant small pores shows decreased activity in a relatively short period of time due to metals deposition. Reducing catalyst particle size under identical reaction conditions increases the desulfurization reaction rate. Acidity of catalyst surface is correlated with coke deposition. The difficulty of developing high-activity long-life catalysts lies in the need to maintain desulfurization activity in the area where deposition of coke and metals from the residua occurs. Reduction of nitrogen oxides by improvement of combustion technology is limited by efficiency and available technology. By combustion, a fairly high 25 to 50 percent or more conversion rate of nitrogen oxides in fuel oil has been shown. 51 references, 13 figures, 4 tables.

• Research Organization: Central Research Inst., Tokyo
• OSTI ID: 6983991
• Journal Information: Catal. Rev. - Sci. Eng.; (United States), Journal Name: Catal. Rev. - Sci. Eng.; (United States) Vol. 16:2; ISSN CRSEC
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ASPHALTENES
ASPHALTS
BITUMENS
CATALYSTS
CHEMICAL REACTIONS
DESULFURIZATION
DOCUMENT TYPES
EFFICIENCY
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
METALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PARTICLE SIZE
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
POROSITY
REVIEWS
SIZE
TAR