TY - JOUR
T1 - On the use of acid-base-supported catalysts for hydroprocessing of heavy petroleum
AU - Leyva, Carolina
AU - Rana, Mohan S.
AU - Trejo, Fernando
AU - Ancheyta, Jorge
PY - 2007/11/7
Y1 - 2007/11/7
N2 - 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 extra-heavy 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 2O3). In addition, extensive research work has been performed with other supports (Al2O3-TiO2, Al2O3-ZrO2, 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.
AB - 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 extra-heavy 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 2O3). In addition, extensive research work has been performed with other supports (Al2O3-TiO2, Al2O3-ZrO2, 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.
UR - http://www.scopus.com/inward/record.url?scp=36348994400&partnerID=8YFLogxK
U2 - 10.1021/ie070128q
DO - 10.1021/ie070128q
M3 - Artículo
SN - 0888-5885
VL - 46
SP - 7448
EP - 7466
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 23
ER -