Pretreatment method of Pt-based catalyst for preparing propylene through propane dehydrogenation

Abstract

The invention discloses a pretreatment method of a Pt-based catalyst for preparing propylene by propane dehydrogenation, which comprises the following steps: before catalytic reaction, putting a freshly prepared Pt-based catalyst into a reactor, introducing gas, and enabling the gas and Pt particles to react under a high-temperature condition to generate a compound capable of moving on the surface of a catalyst carrier; further dispersion of Pt particles is promoted, so that the catalytic performance of the catalyst is improved. According to the present invention, with the treatment according to the method, the ubiquitous non-uniform dispersion of the metal active component in the Pt-based catalyst for propylene preparation through propane dehydrogenation can be effectively solved, the catalytic activity of the catalyst is improved, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a pretreatment method of a Pt-based catalyst for dehydrogenation of propane to propylene. Background technique [0002] Propylene is an extremely important petrochemical basic raw material, and its consumption is second only to ethylene. It is widely used in the production of basic chemicals such as polypropylene, acrylonitrile, butanol and acrylic acid. Driven by industries such as real estate, automobiles, packaging, textiles and clothing, the demand for propylene is strong, and its demand growth rate is about 1.5 times that of GDP. It is estimated that the global growth rate is 3.8% in the next five years, and the domestic 5.2-7.2%. By 2020, the global production and consumption will reach 120 million tons. There has always been a major gap in my country's propylene market. For a long time, it has been necessary to import a large amount from abroad to meet the n...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the ubiquitous problem of uneven dispersion of active components in Pt-based catalysts for propane dehydrogenation to propylene, the present invention provides a pretreatment method suitable for Pt-based catalysts, which can realize the redispersion of Pt loaded on the surface of the catalyst , to prepare a high-performance Pt-based catalyst for propane dehydrogenation

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