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- W70231714 abstract "Many refiners have determined that mild hydrocracking (MHC) is an attractive alternative for converting heavy fuel oils to lighter mid-distillates which are increasingly in demand. Important advantages of MHC are the selective formation of high quality diesel blendstock and the ability to apply this technology in existing vacuum gas oil (VGO) desulfurizers. This paper discusses the criteria for optimizing both catalyst choice and utilization to maximize the economic benefits of MHC. The MHC performance of conventional hydrotreating catalysts and a new generation of MHC catalysts developed by AKZO Chemie's Ketjen Catalyst Group is compared. By applying these new catalysts, conversion levels of 45%, representing an absolute increase of up to 12% over conventional catalysts, may be realized. The improved MHC catalysts have excellent stability. Application studies demonstrate that more than one catalyst type may be needed to optimize conversion for a specific application. Reactor configuration (e.g. single versus multiple bed), feedstock and processing conditions determine the choice of the optimal catalyst(s). Process studies and economic evaluations by Lummus-Crest Inc. indicate that the mild hydrocracking process is an effective way to upgrade heavy oils. For a 20,000 BPSD unit, additional revenue as high as 15 million dollars per year may bemore » realized when going from the HDS to MHC mode of operation. Payout times for revamp investments, when necessary to optimize either conversion and/or the refiner's product slate, are estimated to be about one year.« less" @default.
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- W70231714 date "1984-03-01" @default.
- W70231714 modified "2023-09-27" @default.
- W70231714 title "Mild hydrocracking in heavy oils in the 80's" @default.
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