Hydroprocessing chemistry

Ancheyta J, Speight J. Hydroprocessing chemistry. In Ancheyta J, Speight JG. editors. Hydroprocessing of heavy oils and residua. 1st ed. Boca Raton. FL CRC PressA aylor Francis 2007. p 35-50. 

Ancheyta, J., Speight, J. 2007b. Hydroprocessing chemistry. In Hydroprocessing of Heavy Oils and Residua (J. Ancheyta, J.G. Speight, Eds.), CRC Press, Taylor Francis, Boca Raton, FL, Chapter 3. 

Tops0e, H. Bartholdy, J. Clausen, B.S., Candia, R. results presented at the ACS symposium on Structure and Activity of Sulfided Hydroprocessing Catalysts, The Division of Petroleum Chemistry, Inc. Kansas City Meeting, Sept. 12-17, 1982. 

When catalytic processes are employed, complex molecules (such as those that may be found in the original asphaltene fraction) or those formed during the process, are not sufficiently mobile (or are too strongly adsorbed by the catalyst) to be saturated by hydrogenation. The chemistry of the thermal reactions of some of these constituents (Chapter 4) dictates that certain reactions, once initiated, cannot be reversed and proceed to completion. Coke is the eventual product. These deposits deactivate the catalyst sites and eventually interfere with the hydroprocess. 

Sullivan, R. F. and Stangeland, B. E., "Catalytic Hydroprocessing of Shale Oil to Produce Distillate Fuels," Refining of Synthetic Crudes, edited by Martin L. Gorbaty and Brian M. Harney, Advances in Chemistry Series 179, American Chemical Society, Washington, D.C., 1979 ... 

The objective of this book is to serve as a practical reference work on testing for the main hydrocarbon-conversion processes applied in oil refineries catalytic cracking, hydroprocessing, and reforming. These fields were combined because of the clear analogies and congruence between the areas, such as deactivation of active sites by coke, mass-transfer phenomena of hydrocarbons into solid catalysts, hydrocarbon chemistry and reaction kinetics, and downscaling of commercial conditions to realistic small-scale tests. 

Although SRC s are lower in both sulfur and mineral matter than the coals from which they are derived, these materials will require additional upgrading if higher quahty fuels, such as gas turbine fuels, are desired in the product slate (2). One attractive route for upgrading SRC is an extension of petroleum resid hydroprocessing technology (3). In order to fully understand the chemistry involved in hydroprocessing... 

The Transition Metal Sulfides are a group of solids which form the basis for an extremely useful class of industrial hydrotreating and hydroprocessing catalysts. Solid state chemistry plays an important role in understanding and controlling the catalytic properties of these sulfide catalysts. This report discusses the preparation of sulfide catalysts, the role of disorder and anisotropy in governing catalytic properties, and the role of structure in the promotion of molybdenum disulfide by cobalt. 

Source M. J. Girgis and B. C. Gates, Reactivities, Reaction Networks, and Kinetics in High-Pressure Catalytic Hydroprocessing, Industrial and Engineering Chemistry Research 30 2021-2058 (1991). With permission. 

Tom Lynch is an independent consultant in the lubricants industry. He has 25 years of experience with hydroprocessed lubes working for Petro-Canada in its Research and Development Department on Process Development and subsequently at the company s Lubricants Refinery. He obtained his B.Sc. degree from University College, Dublin, Ireland, and his Ph. D. from the University of Toronto, both in chemistry. He is the author of papers on the chemistry of sulfur compounds, molecular rearrangements, and hydroprocessing. 

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