Catalytically cracked gasoline hydrodesulfurization catalyst and preparation method thereof

Abstract

The invention relates to a catalytically cracked gasoline hydrodesulfurization catalyst and a preparation method thereof. The preparation process of the Co3O4-MoS2 / gamma-Al2O3 catalyst comprises the three steps: making Co impregnated onto an aluminum oxide carrier through an isopyknic method, and carrying out drying and roasting to obtian a Co3O4 / gamma-Al2O3 precursor; dissolving a sulfur-containing compound and molybdenum-containing metal salt into ammonia water, and carrying out refluxing to prepare an ammonium tetrathiomolybdate crystal; and putting the ammonium tetrathiomolybdate crystal,a reducing agent and the Co3O4 / gamma-Al2O3 precursor into a rotary evaporator, and preparing the Co3O4-MoS2 / gamma-Al2O3 catalyst by virtue of a rotary evaporation method. According to the Co3O4-MoS2 / gamma-Al2O3 catalyst prepared by the preparation method disclosed by the invention, the active phase is changed into Co3O4 from conventional Co9S8, and when being used in a selective hydrodesulfurization reaction of catalytically cracked gasoline, the Co3O4-MoS2 / gamma-Al2O3 catalyst shows higher desulfurization selectivity.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular to a catalytic cracking gasoline selective hydrodesulfurization catalyst and a preparation method thereof, the Co in the final catalyst is based on Co 3 o 4 exists in the form of , while Mo is in the form of MoS 2 form exists. Background technique [0002] With the increasingly stringent environmental regulations, the more stringent National V and National VI gasoline quality standards limit the sulfur content of motor gasoline to no more than 10 mg / kg. In my country, catalytic cracking (FCC) gasoline with high sulfur and high olefin content accounts for more than 60% of the total gasoline pool, and its contribution to the sulfur and olefin content of commercial gasoline exceeds 90%. The key to producing with clean gasoline. [0003] From a global perspective, the selective hydrodesulfurization (HDS) process is generally adopted by various refineries to reduce the sulfur con...

AI Technical Summary

Problems solved by technology

The above method of in-vehicle vulcanization shortens the process flow or controls the active phase to a certain extent, but there are still problems such as complex process, large environmental pollution and the use of toxic hydrogen sulfide gas.

Images