Iron compound supported platinum catalyst and preparation thereof

Abstract

The invention discloses an iron compound loaded platinum catalyst and a preparation method thereof. A catalyst carrier is iron oxide or iron hydroxide, and an active component is platinum; percentage composition of platinum mass is 0.1 to 20 percent of the carrier and the catalyst is prepared by adopting a coprecipitation method. The catalyst of the invention is expected to be widely applied in reforming reaction, hydrogenation dehydrogenation reaction and catalyzing combustion pollutants, etc.

Description

technical field [0001] The invention relates to an iron compound-supported platinum catalyst and a preparation method thereof, in particular to a platinum catalyst supported on iron oxide or iron hydroxide and a preparation method thereof. Background technique [0002] Platinum group metal catalysts are widely used in petroleum, chemical, environmental protection and other fields. Since 1949, American Universal Oil Company successfully studied Pt / γ-Al 2 o 3 Since reforming catalysts, most of the reforming catalysts used in industry are loaded with platinum, such as Pt-Re / γ-Al 2 O, Pt-Ir / γ-Al 2 O, Pt-Sn / γ-Al 2 O et al. In the chemical industry, platinum is a common catalyst for hydrodehydrogenation. In recent years, the catalytic role of platinum group metals in the catalytic oxidation of alcohols using molecular oxygen (air) has also become increasingly prominent. The use of molecular oxygen as an oxidizing agent does not cause pollution, is called a "green" catalyst,...

AI Technical Summary

Problems solved by technology

Such a preparation method has many defects, mainly including: 1) due to the high viscosity of water, the active component metal salt solution is difficult to enter the pores of the carrier; 2) the dispersion of the active metal is low; 3) the active component is unevenly distributed; 4) During the drying process, the structure of the carrier will change due to capillary flow, etc.

Most of the carriers supporting platinum catalysts use "inactive" carriers such as alumina and silicon oxide, but it is rare to use iron compounds as platinum catalyst carriers.

[0004] Due to the limitations of traditional preparation methods and supports, the application of supported platinum catalysts is limited to a certain extent.

For example, compared with gold, the oxidation activity of platinum catalysts for carbon monoxide oxidation is very low, which is likely due to the inability to obtain highly dispersed platinum nanoparticles by conventional preparation methods.