Three-dimensional ordered mesoporous molybdenum-based catalyst as well as preparation method and application thereof

Abstract

The invention discloses a three-dimensional ordered mesoporous molybdenum-based catalyst as well as a preparation method and application thereof. The catalyst comprises a mesoporous molecular sieve, wherein sub-nano molybdenum trioxide particles are loaded on the mesoporous molecular sieve. The preparation method comprises the following steps: preparing a precursor solution of the three-dimensional ordered mesoporous molybdenum-based catalyst, and then sequentially carrying out hydrothermal reaction and calcination. The three-dimensional ordered mesoporous molybdenum-based catalyst provided by the invention has the advantages of large specific surface area, strong adsorption capacity, strong catalytic activity, good stability and the like, can be widely used for removing sulfur-containing organic compounds in petroleum products, can realize rapid and effective removal of sulfur-containing organic compounds in petroleum products, shows very excellent oxidative desulfurization activity, and has high use value and good application prospects. The preparation method of the three-dimensional ordered mesoporous molybdenum-based catalyst has the advantages of simple process, convenience in operation, usage of cheap and easily available raw materials, low cost and the like, can realize large-scale batch preparation, and is beneficial to industrial utilization.

Description

technical field [0001] The invention belongs to the field of heterogeneous catalysis technology and petrochemical technology, and relates to a three-dimensional ordered mesoporous molybdenum-based catalyst and its preparation method and application. Background technique [0002] The emission of a large amount of sulfide is the main cause of environmental pollution, and sulfide is produced by the combustion of light fuel oil used in motor vehicles. Many countries have instituted new specifications for the sulfur content of fuel. For example, the EU standard: the concentration of sulfur in petroleum must not exceed 10ppm. In the United States, sulfur concentrations in diesel and gasoline are limited below 15 ppm and 30 ppm, respectively. Therefore, deep and rapid desulfurization is an urgent research problem for researchers. [0003] At present, the common methods of deep desulfurization of fuel oil mainly include hydrodesulfurization and non-hydrodesulfurization. Hydrodesu...

AI Technical Summary

Problems solved by technology

Existing oxidative desulfurization catalysts for oxidative desulfurization include supported molybdenum-based catalysts, including molybdenum trioxide, and molybdenum trioxide is supported on supports such as zeolites, carbon materials, and metal-organic frameworks. However, due to the presence of molybdenum trioxide particles, which are easy to aggregate, It is easy to fall off from the carrier and the active phase is easy to sinter after the reaction. Therefore, the supported molybdenum-based catalyst still has defects such as poor catalytic activity and poor stability, and it is difficult to quickly and effectively remove sulfur-containing organic compounds in fuel.

In addition, the existing preparation methods of supported molybdenum-based catalysts also have the following defects: complex process synthesis steps, high preparation costs, etc.

The existence of the above defects limits the wide industrial application of molybdenum-based catalysts

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