Titania-alumina mixed oxide hydrodesulfurization catalyst and preparing process thereof

Abstract

The utility model relates to a synthesis of a titania-alumina mixed oxide material and a catalyst carrier of a supported deep hydrodesulfurization catalyst by taking the compound as the carrier. 1)take the tetrabutyl titanate and the aluminum chloride or the pseudo-boehmite as the raw material, prepare the mesoporous mixed oxide material of TiO2-Al2O3 with the sol-gel method, and use the material as the carrier of the diesel oil deep hydrodesulfurization catalyst; 2)use the dipping method by modifying the active metal variety and the dipping method to get highly dispersed supported mesoporous hydrodesulfurization catalyst of TiO2-Al2O3 compound material after baking; in the diesel oil hydrogenation deep desulfurization reaction, the desulfurization capability is good, and the desulfurization rate can reach 99 percent; if the reaction can be operated under a relative relaxative condition, the sulfur in the diesel oil can be desorbed from 1300ppm to below 15 ppm, or from the 430ppm to below 1ppm; the sulfur content in the product can meet the standard of Europe IV.

Description

technical field [0001] The present invention relates to a kind of TiO 2 -Al 2 o 3 Synthesis of composite oxide material and preparation of supported deep hydrodesulfurization catalyst based on the composite oxide. Background technique [0002] With the acceleration of the dieselization trend of vehicles worldwide, the demand for diesel is increasing, but the environmental hazards of the exhaust gas produced by diesel combustion are also becoming more and more serious. Therefore, the low-sulfurization of diesel oil has attracted widespread attention from all over the world. Judging from the European and American diesel environmental regulations that have been issued, limiting the content of sulfur and polycyclic aromatic hydrocarbons is a key issue in the production of clean diesel. Although the sulfur content index in diesel oil in my country has been greatly reduced compared with the past, there is still a large gap compared with advanced countries. The research on deep...

AI Technical Summary

Problems solved by technology

[0005] However, using a conventional carrier diesel hydrodesulfurization catalyst (such as Al 2 o 3 Supported NiMo, CoMo or NiW catalyst) is difficult to remove sulfur-containing compounds of DBT derivatives, so it is difficult to achieve the effect of deep desulfurization

At the same time, due to TiO 2 The specific surface area and pore volume are relatively small, and the mechanical strength and thermal stability are poor when used alone, which is not conducive to high pressure and macromolecular reactions.