Regular carrier catalyst with desulfurization effect as well as preparation and application thereof

Abstract

The invention discloses a regular carrier catalyst with a desulfurization effect as well as preparation and application thereof. The regular carrier catalyst comprises a regular carrier and an activecoating attached to the outer surface of the regular carrier, the active coating comprises a IIA and IIB group metal oxide-containing matrix, a molecular sieve and a modified metal film, and the modified metal film comprises nickel and one or more rare earth metals selected from lanthanum, cerium, praseodymium and neodymium. The preparation method comprises the following steps: forming a mixture from metal powder, a hydroxyl-containing solvent and a surfactant, then treating the mixture under ultrasonic waves to obtain a mixed solution after the ultrasonic treatment; separating the mixed solution after the ultrasonic treatment to obtain suspension; contacting the suspension with matrix particles and/or molecular sieve particles or particles containing a matrix and a molecular sieve, carrying out freeze-drying, and then coating on a regular carrier. The catalyst can be used for hydro-desulfurization of hydrocarbon fuel, has the characteristics of high activity and good stability, is used for gasoline desulfurization, and can increase the octane number of gasoline.

Description

technical field [0001] The invention relates to a catalyst with a regular structure for desulfurization of hydrocarbons in the presence of hydrogen, a preparation method and an application method thereof. Background technique [0002] Sulfur in fuel produces sulfur oxides after combustion, which can inhibit the activity of noble metal catalysts in automobile exhaust converters and cause them to be irreversibly poisoned, and cannot achieve catalytic conversion of toxic gases in automobile exhaust, thereby emitting Exhaust gas from automobiles contains unburned non-methane hydrocarbons, nitrogen oxides, and carbon monoxide. These toxic gases are easily catalyzed by sunlight to form photochemical smog and cause acid rain. Sulfur oxide itself is also one of the main causes of acid rain. [0003] Reducing the sulfur content of fuels such as gasoline and diesel is considered one of the most important measures to improve air quality. As people pay more and more attention to enviro...

AI Technical Summary

Problems solved by technology

Hydrodesulfurization reacts sulfur-containing hydrocarbons such as gasoline with hydrogen in the presence of a hydrogenation catalyst. With the increasingly stringent fuel standards, this requires more severe hydrogenation reaction conditions such as higher reaction pressure or temperature to make sulfur Lower levels, but due to the large amount of olefins in gasoline, increasing the hydrogenation severity will result in higher octane loss

Adsorption desulfurization is usually carried out by contacting the adsorbent with sulfur-containing hydrocarbons under the condition of hydrogen. First, the sulfur-containing hydrocarbons in the oil are captured on the adsorbent, hydrogenated to generate hydrogen sulfide, and then combined with zinc oxide to form sulfur-zinc compounds. , will also lead to a decrease in the octane number of gasoline products; in addition, when the sulfur bound on the zinc oxide reaches saturation, it will lead to a decrease in desulfurization activity, and the sulfur must be removed through oxidation regeneration. In the frequent oxidation regeneration-reduction process, the adsorbent The deactivation rate is high, which affects the implementation effect of sulfur-containing hydrocarbon desulfurization

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