SU1088768A1 - Method of cleaning gases from carbon oxide when sulphur anhydride is available (its versions) - Google Patents

Abstract

1. A method for purifying gases from carbon monoxide in the presence of sulfur dioxide by passing through an alumina-based catalyst containing platinum, characterized in that, in order to reduce the process temperature, oxides of cobalt, copper and cerium are added to the catalyst with the following content , mol.p .: Platinum 0,00014-0,00086 Cobal oxide 0, 050-0,250 and 0,050-0,250 Copper oxide 0,050-0,250 Cerium oxide The rest is up to 1 Alumina 2. Method of gas purification from carbon monoxide in the presence of sulfur dioxide by passing through an alumina-based catalyst containing platinum, characterized in that, in order to reduce the process temperature, iron oxides of manganese, copper and cerium are added to the catalyst with the following content of ingredients, mol: 0,00047-0,00100 Platinum 0.059-0.150 Iron oxide Manganium oxide 090-0.207 tsa 0.095-0.1: 50 Copper oxide 0.029-0.045 Cerium oxide Aluminum oxide The rest is up to 3 3. Method of gas purification from carbon monoxide in the presence of sulfur dioxide by passing through an oxide-based catalyst aluminum containing platinum, about tl and h and y y and with the fact that, in order to reduce the process temperature, oxides of cobalt, manganese, copper and chromium are additionally introduced into the catalyst with the following content of ingredients: cx: 0.00014-0,00096 Platinum 00 CoVI oxide 0.050-0.064 Balt 3d X) Oxide Mar0, 050-0,121 Ghana 0.050-0,129 Copper oxide 0,050-0,097 Chromium oxide Alumina Oxide up to 1 mini

Description

The invention relates to methods for cleaning gas mixtures containing sulfur dioxide from carbon monoxide and can be used for the disposal of gas emissions from motor vehicles, oil refining, chemical and metallurgy.

A known method of purifying gases from CO on a catalyst containing oxides of manganese, copper, nickel, cobalt and chromium, deposited on alumina, at 136-250 С lj.

However, in the presence of a catalytic and S02, the specified catalyst 15 loses its activity.

Closest to the present invention is a method for purifying gases from CO in the presence of 80 by passing a catalyst based on 20 containing Ft. The method provides a 50% degree of purification from CO at 290 ° C 2.

The disadvantage of the process is the high process temperature. 25

The purpose of the invention is to reduce the process temperature.

The goal is achieved by the fact that, according to the method of purifying gases from CO in the presence of 80, by passing through the A & yOj catalyst containing Pt, CoO, CuO and Ce02 are additionally introduced in the first embodiment with the following content of ingredients, mol.

Pt 0,00014-0,00086

CoO0,050-0,250

SiO0,050-0,250

CEO 0,050-0,250

A.) The rest is up to 1 40

In the second embodiment, instead of CoO, MpO is also added to the catalyst at the following content of ingredients, mol.

Pt 0.00047-0.00100 45

 0.059-0.150

MnO, 0.090-0.207

CuO 0,095-0,150

Ce02 0,029-0,045

 The rest is up to 1 50

According to the third variant, instead of Ce02, MnOg and Cr20 are introduced into the catalyst with the following content of ingredients, mol.ch .:

Pt 0,00014-0,00096

CoO 0,050-0,064

Mp02 0,050-0,121

SIO 0,050-0,129

 0.050-0.097

ASGO Else to 1

The difference between the proposed method and the known one is that the catalysts used additionally contain oxides of the said base metals, as well as in the above contents of ingredients.

To prepare the catalysts, the mixture of nitrate salts of the corresponding elements is heated to 400-450 ° C until the oxides of nitrogen are completely removed and calcined at 750 ° C for 4 hours. The mixture of oxides is dissolved into fine powder and mixed with a 5-10% solution of HNO to obtain a plastic mass, in which granules are prepared by extrusion, they are dried in air, heated at 300400 ° C to remove moisture and calcined at 750 ° C for 4 hours. The obtained granules are treated with a solution of hydrochloric acid, after which they are dried, heated to 300 ° C and calcined again at 750 ° C for 4 hours.

Example. Pyrex glass, placed in a quartz furnace and containing 2 ml of catalyst, is fed into the reactor at a rate of 30,000 h with an admixture of CO in an amount of 1% by volume and O, 15–0.20% by volume of SOg. The test results are given in Table. 1-3.

When using catalysts containing Pt in quantities smaller than those indicated, a process temperature is observed. Increasing the Pt content above these quantities does not lead to a further decrease in the process temperature, at the same time making the process more expensive. When going beyond the specified limits of the content of oxides of base metals, there is an increase in the process temperature.

As follows from the tables, carrying out the method of gas purification in accordance with this invention provides for lowering the process temperature, since 50% of the degree of purification from CO is achieved at 135-270 ° C against 290 ° C in a known method.

Table 1

Claims (3)

1. The method of purification of gases from carbon monoxide in the presence of sulfur dioxide by passing through an alumina-based catalyst containing platinum, characterized in that, in order to reduce the process temperature, cobalt, copper and cerium oxides are additionally introduced into the catalyst at the following content platinum ingredients Cobalt oxide Copper oxide Cerium oxide Alumina, mol.h .: 0.00014-0.00086 0,050-0,250 0,050-0,250 0,050-0,250 The rest is up to 1 2. A method of purifying gases from carbon monoxide in the presence of sulfur dioxide by passing through ka ingredients, 0,00047-0,00100 0.059-0.150 0,090-0,207 0,095-0,150 0.029-0.045 The rest is up to 1 talitizer based on alumina, containing platinum, characterized in that, in order to reduce the temperature of the process, iron oxides of manganese, copper and cerium are additionally introduced into the catalyst at the following mol% content: Platinum Iron oxide Manganese oxide Copper oxide Cerium oxide Aluminum oxide 3. The method of purification of gases from carbon monoxide in the presence of sulfur dioxide by passing through an alumina-based catalyst containing platinum, characterized in that, in order to reduce the temperature of the process, cobalt, manganese, copper and chromium oxides are additionally introduced into the catalyst at the following content ingredients, mol.h .: Platinum 0.00014-0.00096 Oxide of Balta 0,050-0,064 Oxide Mar ghana 0,050-0,121 Copper oxide 0,050-0,129 Chromium oxide 0,050-0,097 Alumina minia The rest is up to 1