Regular structure desulfurization catalyst, preparation method thereof, and method for desulfurization of sulfur-containing hydrocarbons

Abstract

The invention discloses a regular structure desulfurization catalyst and a preparation method thereof, and a sulfur-containing hydrocarbon desulfurization method. The catalyst comprises a regular structure carrier and an active component coating distributed on the inner surface and / or outer surface of the regular structure carrier, wherein the active component coating comprises, by weight, 5-70 wt% of a transition metal nitride and 30-95 wt% of a matrix, and the matrix comprises, by weight, 70-90 wt% of the oxide of at least a metal selected from group IIA and group IIB, and 10-30 wt% of silicon oxide. The catalyst of the present invention has good desulfurization activity and good desulfurization stability, and can improve the octane number of the desulfurized oil product.

Description

technical field [0001] The invention relates to the field of desulfurization of sulfur-containing hydrocarbons, in particular to a regular structure desulfurization catalyst, a preparation method thereof and a method for desulfurization of sulfur-containing hydrocarbons. Background technique [0002] Sulfur in vehicle fuel produces sulfur oxides after combustion. This substance will inhibit the activity of the precious metal catalyst in the automobile exhaust converter and cause it to be irreversibly poisoned, and cannot realize the catalytic conversion of toxic gases in the automobile exhaust, resulting in the unburned non-methane hydrocarbons and nitrogen in the automobile exhaust. oxides and carbon monoxide. These toxic gases are easily catalyzed by sunlight to form photochemical smog and cause acid rain. And sulfur oxide itself is also one of the main causes of acid rain. [0003] As people pay more and more attention to environmental protection, environmental regulat...

AI Technical Summary

Problems solved by technology

Adsorbent at 0.1~10.3MPa, 37.7~537.7℃, weight hourly space velocity 0.5~50h -1 Under the conditions of hydrogenation and hydrogenation, the sulfur in the oil is captured on the adsorbent and combined with zinc oxide after hydrogenation. At the same time, due to the hydrogenation effect of transition metals on olefins, the octane number of gasoline products will decrease.

In order to make up for the loss of octane number due to the reduction of olefins, the prior art usually adopts the method of promoting the aromatization reaction and increasing the content of aromatics, but this inevitably leads to an increase in the content of benzene in gasoline.

In addition, when the sulfur bound on the zinc oxide reaches saturation, the desulfurization activity will decrease, and the sulfur must be removed through oxidation regeneration.

In the frequent oxidation regeneration-reduction process, metals as active components will aggregate, and zinc oxide will be converted into zinc silicate and zinc aluminate during the regeneration process, which will reduce the desulfurization activity of the adsorbent during recycling. , the deactivation rate of the adsorbent is high, which affects the implementation effect of desulfurization of sulfur-containing hydrocarbons

[0006] It can be seen that although adsorption desulfurization can achieve deep desulfurization well, there are still problems in desulfurization activity and desulfurization stability in practical applications.

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