Method for preparing catalyst Cu-Uio-66 for preparing methanol from synthesis gas

Abstract

The invention discloses a method for preparing a catalyst Cu-UiO-66 for preparing methanol from a synthesis gas, wherein Cu(NO3)2.3H2O, trimesic acid, sodium carboxymethyl cellulose, ammonium chloride, 2-amino terephthalic acid, zirconium tetrachloride and terephthalaldehyde are taken as the main raw materials, Schiff base organic modified UiO-66 is taken as a seed crystal, a hydrolysate of the sodium carboxymethyl cellulose and the trimesic acid are induced under the condition of ultrasonic treatment to have a coordination reaction with Cu<2+>, the crystallization time is greatly shortened, and the metal organic catalyst is rapidly prepared. The prepared organic modified metal catalyst Cu-UiO-66 has the advantages of high selectivity and fast kinetic equilibrium, and no secondary pollution in the technical process, and the catalyst is higher in stability and catalytic activity in the reaction for preparing methanol from synthesis gas.

Description

technical field [0001] The invention relates to a synthesis gas methanol catalyst Cu-UiO-66 and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] Using syngas as raw material to produce methanol through liquid phase or gas phase catalytic reaction process is a main method used in industry at present. Copper-based catalysts are generally used in this process, where copper is considered as the main active component. However, the activity of copper alone is very poor, and the introduction of other components can greatly improve the activity and stability of the catalyst. The most commonly used preparation methods for copper-based catalysts are precipitation and impregnation, and some improved methods based on this. Catalysts prepared by the precipitation method tend to have large particle sizes, low dispersibility, and excessive amounts of reactants. Although the impregnation method can obtain catalysts with active comp...

AI Technical Summary

Problems solved by technology

Catalysts prepared by the precipitation method tend to have large particle sizes, low dispersibility, and excessive amounts of reactants. Although the impregnation method can obtain catalysts with active components on the surface of the carrier, the loading capacity is often low, and the dispersibility of the active components is difficult. control

On the other hand, the structure of the precursor often determines the structure and activity of the final catalyst, but the formation of these precursors is very sensitive to the preparation conditions, and the existing preparation methods are difficult to accurately control

Images