Platinum catalyst taking carbon-coated aluminum oxide core-shell structure as carrier as well as preparation method and application of platinum catalyst

Abstract

The invention discloses a platinum catalyst with a carbon-coated aluminum oxide core-shell structure as a carrier and a preparation method and application of the platinum catalyst. The preparation method comprises the following steps: firstly, taking alumina powder as an inner core, selecting a liquid carbon source, preparing a carbon-coated alumina core-shell structure carrier by adopting a chemical vapor deposition (CVD) method, then impregnating the carrier by using a platinum precursor solution, drying, and reducing to obtain the platinum-based catalyst with the carbon shell internally coated with alumina and externally loaded with platinum nanoparticles. The prepared catalyst is novel in structure, has more excellent catalytic performance and stability in a low-carbon alkane dehydrogenation reaction compared with a traditional Pt / Al2O3 catalyst, is simple in preparation method and lower in cost, and has important reference value for developing a low-carbon alkane dehydrogenation catalyst with high stability and activity in the future.

Description

technical field [0001] The invention relates to a low-carbon alkane dehydrogenation reaction core-shell structure dehydrogenation catalyst and a preparation method thereof, specifically, an Al 2 o 3 A platinum series catalyst with a core-shell structure in which C is the inner core and C is the outer shell, and its preparation method and application. Background technique [0002] Propylene is one of the important petrochemical products, and it is also the basic raw material of the three major synthetic materials, and the main raw material of bulk chemical products such as polypropylene, acrylonitrile, and acrylic acid. Pt-based catalysts are most commonly used in the process of propane dehydrogenation to propylene. The characteristics of alumina, such as large specific surface area, high thermal stability, and strong mechanical stability, make it often used as a carrier for industrial low-carbon alkane dehydrogenation catalysts. However, the catalyst Pt / Al prepared by dir...

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Problems solved by technology

[0003] At present, there is almost no research on the preparation of core-shell structure catalysts and their direct application in the field of propane dehydrogenation by loading active metal Pt on the outer surface of the core-shell structure carrier with alumina as the core and nano-carbon material as the shell layer.

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