Hydrodesulfurization catalyst for removing sulfur compounds in medium/low-temperature coal tar and application thereof

Abstract

The invention discloses a hydrodesulfurization catalyst for removing sulfur compounds in medium/low-temperature coal tar and an application thereof, belongs to the technical field of hydrodesulfurization catalysts for coal tar, and aims to provide a catalyst which can deeply remove the sulfur compounds in the coal tar and has relatively high denitrification capacity, relatively high mechanical strength, relatively high water resistance, a certain specific surface area, proper pore volume and proper pore diameter. The technical scheme is as follows: the catalyst consists of an active ingredient, a carrier and an aid, wherein the carrier accounts for 60 to 75 percent of the total weight of the catalyst; the active ingredient accounts for 18 to 26 percent of the total weight of the catalyst; the aid accounts for 7 to 14 percent of the total weight of the catalyst; the active ingredient consists of metal tungsten, nickel and molybdenum; and based on metal oxides for calculation, tungsten trioxide accounts for 12 to 16 percent of the total weight of the catalyst; nickel oxide accounts for 5 to 7 percent of the total weight of the catalyst; and molybdenum trioxide accounts for 2 to 5 percent of the total weight of the catalyst.

Description

technical field [0001] The invention discloses a hydrodesulfurization catalyst for removing sulfur-containing compounds in medium-low temperature coal tar and an application thereof, belonging to the technical field of coal tar hydrodesulfurization catalysts. Background technique [0002] With the rapid development of the world economy and China's economy, the oil resources used as fuel are becoming less and less, resulting in high oil prices, which provides a golden development opportunity for the coal chemical industry, which has been at a disadvantage for a long time. my country is rich in coal resources, and coal tar is a by-product of coking, coal gasification, and coal chemical industries. With the development of the coal chemical industry, its output is increasing year by year. At present, the annual output of coal tar is about 15 million tons, of which the annual output of high-temperature coal tar is about 10 million tons, and the annual output of medium-low tempera...

AI Technical Summary

Problems solved by technology

Compared with petroleum secondary processing distillate oil hydrotreating catalysts, coal tar hydrogenation catalysts face several problems: first, the oxygen content is high, and the water produced by deoxidation will have an adverse effect on the catalyst activity, stability and strength; Second, the high content of colloid and carbon residue is likely to promote carbon deposition on the catalyst, resulting in catalyst deactivation and reactor blockage; third, high sulfur and nitrogen content in coal tar; fourth, coal tar contains a large amount of aromatics, which makes the diesel fraction ten The hexane number is very low, requiring deep dearomatization to make it saturated and open the ring, and strive to maximize the cetane number, so the catalyst requires suitable acidity