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 surface of the regular carrier, wherein the active coating comprises a heat-resistant inorganic oxide matrix and a modified metal film, the modified metal film comprises a modified metal, and the modified metal is one or more of Fe, Co, Ni, Mn, Ti, Zr, V, Ge, Pb, Sn, Sb and Bi. 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 ultrasonictreatment to obtain suspension; contacting the suspension with matrix particles, carrying out freeze drying so as to obtain matrix particles containing a modified metal film, and then coating the regular carrier with the matrix particles containing the modified metal film so as to obtain the regular carrier catalyst. The catalyst is high in desulfurization activity, good in stability and high inproduct yield, is used for gasoline desulfurization and is small in octane number loss.

Description

technical field [0001] The invention relates to a modified molecular sieve used for hydrogen desulfurization, 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 environmental protection, environmental prote...

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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