Catalyst system for sulfur-containing hydrocarbon oxidative desulfurization and sulfur-containing hydrocarbon oxidative desulfurization method

Abstract

The invention discloses a catalyst system for sulfur-containing hydrocarbon oxidative desulfurization and a sulfur-containing hydrocarbon oxidative desulfurization method. The catalyst system comprises a regular structure catalyst and a sulfur oxide removing assistant, wherein an active ingredient coating of the regular structure catalyst comprises 30-90wt% of active metal oxide and 10-70wt% of matrix; the sulfur oxide removing assistant comprises 5-35wt% of alumina, 5-35wt% of a silicon oxide source and 30-90wt% of an oxide selected from at least one metal in group IIA; the sulfur oxide removing assistant refers to microspheres with the mean particle size of 20-200microns; a weight ratio of the sulfur oxide removing assistant to the active ingredient coating of the regular structure catalyst is (10-90):1. The catalyst system provided by the invention has excellent desulfurization activity and desulfurization stability.

Description

technical field [0001] The invention relates to a catalyst system for oxidative desulfurization of sulfur-containing hydrocarbons and a method for oxidative desulfurization of sulfur-containing hydrocarbons, in particular to a catalyst system for oxidative desulfurization of sulfur-containing hydrocarbons and a method for using the catalyst system for oxidative 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 ...

AI Technical Summary

Problems solved by technology

Although adsorption desulfurization can achieve good deep desulfurization, the following problems still exist in practical applications: (1) Due to the hydrogenation effect of transition metals on olefins, the octane number of gasoline products will decrease and the quality of gasoline products will be reduced.

(2) When the sulfur bound on the zinc oxide in the aforementioned adsorbent reaches saturation, the desulfurization activity will decrease, and the sulfur must be removed through oxidation regeneration before it can be used again

[0007] Although there have been a lot of literature reports on the oxidative desulfurization of fuel oil, and various improvement researches are constantly being carried out, the oxidative desulfurization technology is still in its infancy and has disadvantages: for example, the high cost of oxidants, the loss of oil products caused by the introduction of water into the system , The oxidant itself is highly corrosive and polluting, and the catalyst is not easy to recycle, etc. Breakthroughs in solving these problems will enable better industrial application of the oxidative desulfurization process

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