Supported vanadium-substituted polyacid desulfurization catalyst porous nanocrystal and preparation method thereof

Abstract

The invention provides a preparation method of a supported vanadium-substituted Keggin type polyacid desulfurization catalyst porous nanocrystal. The catalyst is formed by using a three-dimensional porous main body framework constituted by copper and trimesic acid through a coordination bond to support vanadium-substituted Keggin type molybdatophosphoric acid. Polyacid is orderly arranged in the main body framework in an object form, and the supporting amount is above 54%. The nanocrystal catalyst can be synthesized by a room-temperature solid phase or room-temperature liquid phase method and be stably dispersed in an oil phase. Under mild conditions, molecular oxygen is taken as an oxidant, and the nanocrystal can efficiently realize catalytic oxidation of aromatic sulfides in fuel oil and further realize deep desulfurization. The catalyst can be recovered by centrifugal operation and be reused mainly times after drying treatment. The preparation method of the polyacid nanocrystal desulfurization catalyst, provided by the invention, is simple, can effectively solve the technical difficult problems of immobilization, separation, recovery, reuse and stable dispersion in the oil phase of the polyacid catalyst, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic materials, and relates to a method for preparing a porous nanocrystal of a supported vanadium-substituted polyacid desulfurization catalyst. Background technique [0002] Polyoxometalates (polyoxometalates, abbreviated as POMs), also known as polyacid compounds, are a class of nano-sized inorganic metals formed by the connection of early transition metals (Mo, W, V, Nb, Ta, etc.) through oxygen. - Oxygen clusters. Due to its strong acidity and reversible redox properties, it has attracted much attention in the field of catalysis. The polyoxometalates currently used as catalysts are mainly of the general formula [XM 12 o 40 ] n- Keggin-type heteropoly compounds, where X is mainly P, Si, Ge, As, etc., and M is mainly Mo, W, etc. Because Keggin-type polyacid compounds have the advantages of high stability, simple synthesis, low cost, and environmental friendliness, they can e...

AI Technical Summary

Problems solved by technology

One of the objectives of the present invention is to provide a supported vanadium substituted Keggin type molybdophosphoric acid desulfurization catalyst porous nanocrystals to solve the technical problems of polyacid catalyst dispersion, separation, recovery and reuse in the oil phase.

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