Preparation method for titanium-containing hierarchical porous structure mesoporous molecular sieve catalyst

Abstract

The invention discloses a preparation method for titanium-containing hierarchical porous structure mesoporous molecular sieve catalyst. The preparation method for the titanium-containing hierarchical porous structure mesoporous molecular sieve catalyst uses peroxotitauium acid as titanium source and uses mesoscopic compound composed of cationic surface active agent-hexadecyl trimethyl ammonium bromide (CTAB) and anionic polyelectrolyte (PAA) as a dynamic template to synthesize to form a hierarchical porous structure mesoporous titanium silicalite molecular sieve; the prepared titanium-containing hierarchical porous structure mesoporous molecular sieve catalyst is used for the oxidative desulfurization reaction which uses dibenzothiophene (DBT) as model sulfide. The preparation method for the titanium-containing hierarchical porous structure mesoporous molecular sieve catalyst has advantages that the catalyst is capable of catalyzing the oxidizing reaction of the thiophene sulfur compound under a low temperature and realizing deep desulfurization; the catalyst preparation method is simple in technique, easy to implement and good for industrial production.

Description

technical field [0001] The invention belongs to the technical fields of heterogeneous catalysis, petroleum processing and petrochemical industry, in particular to a preparation method of a titanium-containing multi-level porous structure mesoporous molecular sieve catalyst. Background technique [0002] In today's society, people pay more and more attention to environmental issues. Sulfur compounds in fuel oil burn to form SO x , is discharged into the air to pollute the environment, so the deep desulfurization of fuel oil has become the focus of many people's attention. The traditional desulfurization process is hydrodesulfurization (HDS), which is very effective for the removal of non-thiophene sulfur, but for the desulfurization of thiophene (Th), benzothiophene (BT), dibenzothiophene (DBT) and their derivatives It worked poorly. Moreover, hydrodesulfurization needs to be operated under high temperature and high pressure, and a large amount of hydrogen is required, whi...

AI Technical Summary

Problems solved by technology

Although there are many reports on the oxidative desulfurization reaction using titanium-containing mesoporous molecular sieves as catalysts, there are few reports on heterogeneously catalyzed ODS (oxidative desulfurization) reactions at low temperatures.

Images