The method of purification of hydrogen from impurities of carbon monoxide and organic compounds and a method of producing a catalyst for purification of hydrogen

 

(57) Abstract:

Usage: in the chemical industry, in particular for catalytic purification of hydrogen and in the methods for producing catalysts for this process. The inventive method of purification of hydrogen from impurities of carbon monoxide and organic compounds, including their oxidation to carbon monoxide in the presence of a catalyst containing, by weight. 30 65 copper oxide; 18 31 zinc oxide; 0.1 to 2.7 manganese dioxide; 0,08 0,8 carbon and other media on the basis of aluminum oxide and at 120 to 450°C. it is also Proposed a method of obtaining a catalyst. 2 S. and 1 C. p. F.-ly, 1 table.

The invention relates to chemical technology, in particular for catalytic purification of hydrogen and methods of producing catalysts for this process.

Closest to the invention to the technical essence and the achieved result is a method of producing the catalyst on the basis of salts of copper and zinc, including mixing and subsequent molding and curing of the pellets.

The disadvantage of this method is its lack of activity of the catalyst in the process of purification of hydrogen.

The task of the invention to develop the method of purification of hydrogen, which are metals of the Pt group.

The problem using the method of purification of hydrogen from impurities of carbon monoxide and organic compounds, including their oxidation to carbon dioxide in the presence of a catalyst containing, by weight. the copper oxide 30-65; zinc oxide 18-31; manganese dioxide 0.1 to 2.7 and alumina rest. The process is conducted at t 120-450aboutC.

The task is also solved using the method of producing a catalyst for purification of hydrogen-containing gas from impurities of carbon monoxide and organic compounds comprising the mixture of isomorphous salts of copper and zinc with the addition of activated carbon and manganese compounds, followed by mixing with a carrier of aluminum oxide, intensive mixing of the mass with Cu-Zn-Al or Cu-Zn-Al-Mn alloys at mass ratio mass:alloy, equal to 1:(0,01-0,4), and molding and curing, moreover, the mixing is carried out to change the color of the mass to gray-brown or greenish-brown and odors of alcohol, and the alloy charge if the balance of components of Cu-Zn-Al(1-6):(0,3-6):(1-6) or Cu-Zn-Al-Mn(1-6):(0,3-6): (1-6):(0,1-1).

The application of the catalyst in the catalytic purification of hydrogen at a temperature from 120 to 450aboutAllows you to replace costly metals of the Pt group and to maintain a high degree vaznyh (topochemical) reactions, source components with alloy type alloy Devarda: Cu-Zn-Al or Cu-Zn-Al-Mn emitting during intensive mixing of the active atomic hydrogen, activating the source connection of copper and allowing ultimately to increase the activity of the catalyst. And introduced into the composition promoters of manganese and coal provide a reduction in the threshold of ignition of the catalyst up to 120aboutC. in Addition, enter in the composition of the carbon, which has restorative properties, maintains the active state of the copper in the synthesis process, and in the process of operation, and manganese compounds allow oxygen conversion of carbon monoxide and organic impurities.

P R I m e R 1 (receipt of catalyst). In a reactor with intensive mixing, equipped submission dioxide, water, and heating the mix copper carbonate CuCO3, zinc carbonate ZnCO3, activated carbon C and manganese oxide MnO2, the precipitate was separated, dried and mixed with a native oxide Al Al2O3.

The resulting mass is loaded into a ball mill, in which to sleep, and the alloy Cu-Zn-Al, characterized by the ratio of Cu-Zn-Al 1:0,3:1, alloy charge in the amount of weight:alloy 1:0,01. For the next papaha alcohols, unload and molded into pellets, and then spend the hardening of the granules.

The resulting catalyst has a composition, by weight. the copper oxide 40,2; zinc oxide 30,1; media Al2O328,1; activated carbon of 0.8; manganese oxide 0,8.

P R I m m e R 2. Obtained in example 1 the catalyst was tested in the process of purification of hydrogen. The hydrogen containing 1.5 on. WITH; 0,2 about. cyclohexane; 0,2 about. cyclohexanone, pass in an industrial unit over the catalyst at a volumetric rate 15000 h-1and a temperature of 120aboutC.

The degree of purification from CO was 99.6% of organic impurities 87%

Similarly, the obtained catalysts other compositions and held them clean hydrogen-containing gas from carbon monoxide and organic impurities.

Data examples are summarized in table.

As can be seen from the presented examples, the degree of purification of gas on the catalyst is not inferior degree of cleanup Pd-catalyst and increases the degree of purification of the catalyst prepared according to the method prototype to obtain the catalyst.

1. The method of purification of hydrogen from impurities of carbon monoxide and organic compounds, including their oxidation to carbon dioxide is C.

The copper oxide 30 65

Zinc oxide 18 31

Manganese dioxide 0,1 2,7

Carbon 0,08 0,8

Media-based alumina Rest

and the process is conducted at 120 450oC.

2. A method of producing a catalyst for purification of hydrogen from impurities of carbon monoxide and organic compounds comprising a mixture of copper compounds and zinc, followed by molding and curing of granules, characterized in that the cook is isomorphic to a mixture of salts of copper and zinc in the solution and the mixture additionally served activated carbon and a compound of manganese, and then separating the precipitate and mix it with a carrier, then the resulting mass is injected Cu Zn Al - Zn and Cu-Al-Mn alloy with a mass ratio of the mass of alloy 1 0,01 0,4, and take the alloy ratio of the components Cu Zn Al 1 6 0,3 6,0 1 6 or Cu Zn Al Mn 1 6 0,3 6,0 1 - 6 0,1 1,0 and carry out intensive mixing of the mass to change its color to gray-brown or greenish-brown and the emergence of a smell of spirits.

3. The method according to p. 2, characterized in that as the carrier take the aluminum oxide or shungite, or calcium aluminate.

 

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