Combined aluminum oxide-based selective hydrodesulfurization catalyst and preparation method thereof

Abstract

The invention relates to a selective hydrodesulfurization catalyst of a combined alumina base and a preparation method thereof. The carrier of the catalyst is compounded by macroporous alumina with a specific surface of 280-300m<2> / g, and a pore volume of 0.8-0.9mL / g as well as fenestral alumina with a specific surface of 250-280m<2> / g, and a pore volume of 0.3-0.4mL / g; the active components of the catalyst are cobalt and molybdenum; the addition agents of the catalyst are magnesium and boron. The preparation method of the catalyst comprises: mixing the macroporous alumina and the fenestral alumina; adding sesbania powder and nitric acid, then carrying out mixing kneading, shaping, drying and baking on the mixture to prepare the compound carrier of the alumina; then loading the addition agents of magnesium and boron as well as the active components of cobalt and molybdenum in sequence, then carrying out drying and baking on the mixture to prepare the catalyst. The catalyst has excellent gasoline selectivity and hydrodesulfurization activity, low loss of product researching octane number, high liquid yield, and the like.

Description

Combined alumina-based selective hydrodesulfurization catalyst and preparation method thereof technical field The invention relates to a hydrodesulfurization catalyst and a preparation method thereof, in particular to a selective hydrodesulfurization catalyst containing auxiliary agents magnesium and boron, which uses combined alumina as a carrier and a preparation method thereof. Background technique In recent years, with the rapid increase in the number of motor vehicles in various cities, the air pollution caused by vehicle exhaust emissions has become increasingly serious. Controlling the air quality of large and medium-sized cities has become an urgent problem to be solved to improve the quality of life of people in various countries and ensure the sustainable development of the national economy. one of the major key issues. In order to control the air pollution caused by automobile exhaust emissions, countries all over the world have formulated strict gasoline stand...

AI Technical Summary

Problems solved by technology

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a hydrodesulfurization catalyst with good hydrodesulfurization activity and selectivity, which can effectively improve the existing catalytic cracking gasoline upgrading catalyst mechanism by combining alumina carriers with different pore sizes. Problems of poor strength, poor catalytic stability and poor overall performance, especially suitable for upgrading FCC gasoline