Method for deep-desulfurization of FCC gasoline by using double oxidants

Abstract

The invention belongs to the field of petrochemical industry, and relates to a method for deep-desulfurization of FCC gasoline by ultrasound assisted Ce4+ and H2O2 double oxidants oxidation. In the method, organosulfur compounds in the FCC gasoline are removed by cooperation of the Ce4+ oxidant and the H2O2 oxidant under the assist of ultrasonic waves, so that the aim of deep-desulfurization is implemented; wherein Ce3+ generated after the Ce4+ oxidizes the FCC gasoline is reusable after being prepared through an electrochemical method. Compared with the prior desulfurization technology, the method not only can effectively remove sulfocompounds which harm the environment in the FCC gasoline, but also meets requirements on deep-desulfurization of the FCC gasoline. Simultaneously, the Ce4+ prepared by the electrochemical method has higher electrochemical activity, and the method can ensure clean production as well as improve economic benefits.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for oxidative desulfurization of FCC gasoline. 4+ and H 2 o 2 Combination of two oxidants for oxidation removal of sulfur-containing organic compounds in FCC gasoline. Background technique [0002] With the development of the automobile industry, the annual consumption of gasoline for vehicles is increasing sharply, and the large amount of exhaust emissions from automobiles, especially the SOx contained in them, deteriorates the air quality and makes the environmental pollution more and more serious. Therefore, environmental regulations have increasingly stringent requirements for sulfur content. Both the European Union and the United States have implemented restrictions on the sulfur content of gasoline below 50 μg / g since 2005. In 2009, the fuel oil standard reached the Euro V standard, and the sulfur content was 10 μg / g. . my country strives to achieve the synch...

AI Technical Summary

Problems solved by technology

The sulfur content in FCC gasoline is relatively high, among which thiophene sulfur content is the most, with a relative content of more than 60%. However, the most commonly used hydrodesulfurization method is difficult to remove thiophene compounds. In order to produce ultra-low sulfur gasoline, hydrodesulfurization Must require high temperature and high pressure, consume a lot of H 2 And use a new catalyst, and will lead to a reduction in gasoline octane number

Therefore, the traditional hydrodesulfurization method is not only limited by cost and hydrogen source, but also deep desulfurization will lead to a large loss of octane number