Preparation method and propane oxydehydrogenation application of rodlike hexagonal boron nitride foam

Abstract

The invention discloses a preparation method and propane oxydehydrogenation application of rodlike hexagonal boron nitride foam, and relates to the fields of material science and technology and petrochemical engineering. The preparation method of the rodlike hexagonal boron nitride foam utilizes a hydrolysis polymerization reaction of melamine and boric acid. A dried precursor is reduced in ammonia gas to generate hexagonal boron nitride which is a white foam solid. The foam is prepared from rodlike hexagonal boron nitride having connected pores (with the size of about 100 nm). The pore structure is beneficial to gas circulation and diffusion, so the foam has good potential as a heterogeneous catalyst. The rodlike hexagonal boron nitride foam shows excellent propane dehydrogenation performance. The method has the advantages of simplicity, high yield, facilitation of large-scale industrial production, and remarkable economic and social benefits.

Description

technical field [0001] The invention discloses a preparation method of rod-shaped hexagonal boron nitride foam and its application in propane oxidative dehydrogenation, and relates to the fields of material science and technology and petrochemical industry. Background technique [0002] The morphology and structure of a material have a significant impact on its properties and applications. Foam materials have properties such as low density, large specific surface area, porosity, and high load capacity, and have a wide range of applications in the fields of thermal insulation, gas sensing, energy, and catalysis. Recently, hexagonal boron nitride was found to have excellent performance in the oxidative dehydrogenation of short-chain alkanes. However, when it is used as an oxidative dehydrogenation catalyst, it is often in a powder state, and it is easy to cause a large pressure drop in a plug flow reactor, affecting the diffusion of reaction substrates and products, and it is...

AI Technical Summary

Problems solved by technology

However, when it is used as an oxidative dehydrogenation catalyst, it is often in a powder state, and it is easy to cause a large pressure drop in a plug flow reactor, which affects the external diffusion of the reaction substrate and product, and it is difficult to control the catalytic reaction.

Therefore, granulation is often required before the reaction to reduce air resistance, which increases the preparation process of the catalyst and affects the efficiency

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