SU1577815A1 - Catalyst for selective cleaning of gases from carbon oxide - Google Patents

Abstract

The invention relates to catalytic chemistry, in particular catalysts for the selective purification of gases from carbon oxides, and can be used to clean the environment and in chemical industries. The goal is to increase the activity of the catalyst. The catalyst contains, wt%: CUO 6-12

MNO 2 25-30

TIO 2 2.0-3.5

NIO 1.5-2.5

AL 2 O 3 to 100. At the same time, the degree of gas purification is achieved up to 50-100% at a temperature of 70-120 ° C, the flow rate of the gas-air flow is 23000 h -1 and the initial concentration of carbon monoxide is 1.5% by volume The specified composition of the catalyst does not react. 1 tab.

Description

The invention relates to catalysts for the selective purification of gas mixtures from carbon monoxide and may find application in the field of environmental protection, as well as in the chemical and petrochemical industries.

The aim of the invention is to increase the activity of the catalyst due to the additional content of titanium dioxide and nickel oxide at a certain ratio of components.

Example 1. For experimental verification of the catalyst, five mixtures of ingredients were made. The catalyst is obtained by mixing -g-alumina, titanium oxide grade ch. And nickel oxide grade h.

The resulting mixture is mixed with a solution of copper nitric acid, then 20 ml of a 10% ammonia solution are added to precipitate Cu (OH) completely. Then the precipitate is filtered off, washed with water until negative reaction. The ions are N0 $ and NH J. The precipitate is dried and calcined in air at 100-120 ° C for 3 hours. The resulting mass is impregnated with a solution of manganese nitric acid. The solution with the catalyst is evaporated in a water bath, after which the catalyst is calcined for 5 hours in air flow at 160 C. 10 g of catalyst are obtained.

The table shows the obtained properties of the catalyst of the proposed composition with a different ratio of ingredients and compositions.

Testing of the activity and selectivity of the catalyst is carried out on a flow-type installation with a chromatograph

00

ate

analysis of gases. The composition of the model gas mixture, vol.%:

Carbon monoxide CO 1.5 Hydrogen, 5

Methane CH41.0

As an indicator of activity and selectivity, the catalyst is the degree of oxidation of the individual components (CO, H,, CЬC.) Of the gas-air mixture. The volumetric rate of the gas-air mixture is 23 thousand h — at 70–120 ° C.

From the table it follows that the catalyst of the proposed composition (experiments 2-4) compared with the prototype has a significantly higher activity and selectivity; in the presence of the proposed catalyst is achieved 50-100% degree

the concentration of carbon monoxide is 1.5 vol.%, and the proposed composition does not react to active gases such as hydrogen and methane.

Claims (1)

Invention Formula A catalyst for the selective purification of gases from carbon monoxide, including copper oxide and manganese dioxide on a carrier of active alumina, characterized in that, in order to increase the activity of the catalyst, it additionally contains titanium dioxide and nickel oxide in the following ratio of components, wt.%: Copper oxide 6.0-12.0 Manganese dioxide 25.0-30.0 Used substances, g: Ti02 Nio Cu (N03) Mn (N03) 1-6H, zO The composition of the catalyst, wt.% Cuo MnO Tio Nio A1gOe Oxidation degree of carbon monoxide, at temperatures of gas mixture C 70 80 90 100 110 120 The degree of oxidation of hydrogen H at temperatures of the gas mixture, ° C: 70 80 90 100 3 25 3.5 2.5 45 61 70 78 91 96 9.0 27.5 2.7 1.8 flax 12.0 30.0 2.0 1.5 12.0 32.5 2.0 1.5 19.6-22.0 7.1-10.7 Rest 58 73 82 89 98 100 57 74 83 89 98 100 55 73 81 87 97 100 26 30 32 110 120 The oxidation state of methane Ctt at temperatures of the gas mixture, ° C: 70 80 90 100 110 110 4 8 8 14