Catalyst for improving anaerobic aromatization reaction performance of methane and preparation method of catalyst

Abstract

The invention discloses a catalyst for improving anaerobic aromatization reaction performance of methane and a preparation method of the catalyst. The preparation method comprises the following steps:firstly, drying a carrier molecular sieve and an auxiliary falling object melamine for later use; dissolving ammonium molybdate tetrahydrate into deionized water to be subjected to ultrasonic dispersion, enabling the volume of the deionized water to be equal to the saturated water absorption capacity of the carrier molecular sieve, impregnating the carrier molecular sieve with the solution, uniformly stirring and mixing, impregnating at room temperature, and drying, so as to obtain a catalyst precursor for later use; weighing melamine, and fully and uniformly mixing melamine with the catalystprecursor in a solid-solid mixing or solution mixing evaporation manner; and heating and roasting the mixture in a nitrogen or air atmosphere to obtain the catalyst for improving the anaerobic aromatization reaction performance of methane. The preparation method is simple, green, efficient and high in economic benefit, raw materials are easy to obtain, and industrial production requirements are easy to meet.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical catalysts, and in particular relates to a catalyst for improving the performance of methane anaerobic aromatization reaction and a preparation method thereof. Background technique [0002] Aromatic hydrocarbons are an important organic reaction intermediate in the petroleum industry, and are widely used in many industries such as medicine, military industry, materials, and daily cosmetics. At present, the main source of aromatics still relies on traditional processes such as catalytic reforming in petrochemical industry. However, China's oil resources are short and its dependence on foreign countries remains high. Therefore, the development of a new aromatics preparation technology has great practical significance for the national energy strategy and security. In 1993, Wang Shenglin of Dalian Institute of Chemical Physics proposed for the first time that methane could be directly and ...

AI Technical Summary

Problems solved by technology

However, when adding active metals, precious metal components are often added, which increases the cost, and the modification and reprocessing steps are often cumbersome, requiring repeated modification of molecular sieves, which is time-consuming and laborious; the synthesis of hollow HZSM-5, nano-HZSM-5, nuclear Shell-type HZSM-5 also needs to add expensive soft and hard templates to create pores, which not only has harsh conditions, but also reduces the wear resistance of the catalyst in the fluidized bed, making it difficult to apply in subsequent industrialization

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