Hydrocracking activity of NiMo-USY zeolite hydrotreating catalysts

Egia, B.; Cambra, J.F.; Güemez, B.; Arias, P.L.; Pawelec, B.; Fierro, J.L.G.

doi:10.1016/s0167-2991(97)80059-6

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…Hence, modified zeolites and mixed oxides can be promising supports for the hydroprocessing of heavy oil, because of acidity, and such catalysts would combine a hydrogenation function of a metal (Mo, Co, Ni) sulfide phase. − Alumina is the most utilized carrier for this type of reaction, but it has moderate hydrocracking activity. Research on the application of zeolites in heteroatom removal processes is fairly recent; their exceptional properties, such as catalytic activity and resistance to poisoning by sulfur- and nitrogen-containing organic compounds, is an incentive for the use of zeolites as a hydrotreating catalyst support . However, the use of zeolites is characterized by high hydrocracking to undesirable complex hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Acid-Base-Supported Catalysts for Hydroprocessing of Heavy Petroleum

Leyva

Rana

Trejo

et al. 2007

Ind. Eng. Chem. Res.

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The environmental regulation pressure is being increased to reduce precursors of pollution contaminants (sulfur, nitrogen, and aromatics) in fuels to lower levels. There are various processes to upgrade heavy and extraheavy crude oils, such as solvent deasphalting, thermal conversion, catalytic conversion, distillation, and hydroprocessing. Hydroprocessing not only upgrades the crude oil but also produces synthetic crude oil that has a lower impurities content and a higher liquid yield of products. The fuels upgrading currently is achieved in refinery hydroprocessing units using different new-generation catalysts, along with several modifications of process conditions such as multistage reactors, type of catalyst loading, and reactor internals. However, it has been widely recognized that, for deep removal of these contaminants by hydroprocessing, research must be more oriented to the catalyst developments, rather than the process conditions. Actual commercial catalysts are based on well-known and studied active metals (CoMo, NiMo) and support (Al 2 O 3 ). In addition, extensive research work has been performed with other supports (Al 2 O 3 -TiO 2 , Al 2 O 3 -ZrO 2 , etc.). Nevertheless, other promising acidic materials, such as zeolites, have received relatively less attention, and experimental reports on their use as part of the heavy oil hydroprocessing catalyst support are scarce in the literature. The objective of this contribution is then to discuss the use of acidic and/or basic materials as a support for the hydroprocessing catalyst, specifically for their possible application for the hydroprocessing of heavy oils, in cases where the desired product selectivity is toward gasoline and middle distillates.

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