Molybdenum-containing catalysts in the reactions of cumene cracking and thiophene hydrocracking

Henker, Matthias; Wendlandt, K.‐P.; Анисимов, А. В.; Караханов, Э. А.

doi:10.1016/0031-6458(90)90051-g

Cited by 1 publication

(1 citation statement)

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“…This indicates that the amount of weakly and strongly bonded metals is approximately the same for the two catalysts. At the same time, it was shown in [32] that the increase in the total number of acid centers was accompanied by an increase in the number of strongly bound metals with the aluminum oxide surface. Probably, in our case, the lack of dependence of the number of acid centers on the number of strongly bound metals on the surface is due to the use of a chelating agent.…”

Section: Temperature-programmable Catalyst Reductionmentioning

confidence: 94%

Ex Situ Upgrading of Extra Heavy Oil: The Effect of Pore Shape of Co-Mo/γ-Al2O3 Catalysts

et al. 2022

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Co-Mo/γ-Al2O3 catalysts with different pore shapes were synthesized for the ex situ upgrading of extra heavy oils by hydrodesulfurization (HDS), hydrodemetallization (HDM), and hydrodeasphaltization (HDA). The catalysts were synthesized using aluminum oxides that were prepared by various methods. It was found that using the product obtained by the thermochemical activation of gibbsite leads to the formation of slit-shaped pores in aluminum oxide, while the application of the hydroxide deposition method by the precipitation of sodium aluminate and nitric acid gives cylindrical pores in aluminum oxide. Co-Mo catalysts synthesized using these two types of pores exhibit different catalytic activities. The catalyst synthesized on a carrier with cylindrical pores exhibited a higher catalytic activity in sulfur, heavy metals, and asphaltenes removal reactions that are synthesized on a carrier with slit-like pores. This is because the presence of cylindrical pores leads to a decrease in diffusion restrictions when removing large molecules of asphaltenes and sulfur-containing and metal-containing compounds.

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Section: Temperature-programmable Catalyst Reductionmentioning

confidence: 94%