SU1414447A1 - Catalyst for cleaning waste gases from carbon oxide - Google Patents

Abstract

The invention relates to catalytic chemistry, in particular to a catalyst for purifying exhaust gases from carbon monoxide. In order to increase the activity of the catalyst, it contains copper oxide as a copper-containing component and schungite as a carrier in the following ratio of components, wt%: copper oxide 10.0-30.0; schungite rest. This catalyst is obtained according to a simple technology, its synthesis is carried out in 12-14 hours, the catalyst contains 10-30% of the active component, and the catalyst activity allows the purified air to be supplied with a bulk velocity of 20,000 hours versus 30-40 days, 85.4-99 , 4% and 2700, respectively, from a known catalyst. 1 tab. (L

Description

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The invention relates to catalysts for protecting the environment from carbon monoxide and can be applied in the chemical, metallurgy, automobile and other industries to purify exhaust gases that contain carbon monoxide.

The aim of the invention is to increase the activity of the catalyst due to the content of copper oxide as a copper-containing component and shungite as a carrier with a certain ratio of components.

Example 1, 1.39 g CuISCO (HE is suspended in 50 ml of water, the suspension is heated with stirring to 85-90 ° C and formic acid is added for 1 hour until carbon dioxide evolution ceases, which consumes 1.0 g of acid. Separately, Prepare a suspension of 9.5 g of schungite in 100 ml of water containing 0.1 g of polyvinyl alcohol. The suspension of schungite is shifted with a solution of copper salt, the mixture is heated for i h at 85-90 ° C for stirring and the solution is evaporated. The resulting mass is dried at PO-120 C for 4 hours, calcined for 3 hours at and pelletized at a pressure of 3000 kg / cm.

The resulting catalyst contains 5 wt.% Copper oxide and 95 wt.% Schungite.

Example 2. The catalyst is prepared according to Example 1 with the difference that a suspension is prepared containing 2.77 g CuCOjCi (OH) in water, into which 1.1 g of formic acid is introduced, and the resulting solution is mixed with the suspension, shngit in the water 9.0 g.

The resulting catalyst contains 10% by weight of copper oxide and 90% by weight of carbonyl oxide.

Example 3. A catalyst was prepared analogously to Example 1 with the only difference that a suspension was prepared containing 5.54 g CuCOj Cu (OH) -J in water, into which 2.3 g of formic acid was introduced, and the resulting solution was mixed with suspension containing 8.0 g of juice.

The resulting catalyst contains 20 wt.% Copper oxide and 80 wt.% Schungite.

Example 4. The catalyst was prepared according to Example 1 with that difference.

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that a suspension is prepared containing 6.93 g of CuSO3 Cu (OH) 2 in water, into which 2.7 g of formic acid is introduced, and the resulting solution is mixed with a suspension containing 7.5 g of schungite.

The resulting catalyst contains 25 wt.% Copper oxide and 75 wt.% Shungite.

Example 5. A catalyst was prepared as described in Example 1 with the difference that a suspension was prepared containing 7.31 g of CuSOE (OH) 2 in water into which 3.0 g of formic acid was introduced, and the resulting solution was mixed with a suspension containing 7.0 g of schungite in water.

The resulting catalyst contains 30 wt.% Hydroxy, and copper and 70 wt.% Schungite.

Example 6. A catalyst is prepared as described in Example 1 with the difference that a suspension is prepared containing 1 3.85 g CuCOj Cu (OH) -2 in water, into which 5.7 g of formic acid is introduced, and the resulting solution is mixed with suspension containing 5.0 g of schungite in water.

The resulting catalyst contains 50 wt.% Copper oxide and 50 wt.% Schungite.

The catalyst is tested for activity in the oxidation reaction of carbon monoxide in a flow-type installation, the source gas contains 0.5-1.0% by volume of CO in air, the gas feed rate is 20,000 h, the temperature in the catalyst bed is 20-500 ° C.

The table shows the activity of the catalysts prepared in Examples I-6 and the known catalyst in the oxidation of carbon monoxide.

As can be seen from the table, the proposed catalyst has a significantly higher productivity and allows, at a high feed rate of the gas mixture, to achieve a given degree of purification from carbon monoxide at lower temperatures than the known one. Thus, a 50% oxidation state of carbon monoxide on the proposed catalyst is achieved at 148-180 ° C, and a 90% conversion at 230-250 ° C, depending on the content of copper oxide in the catalyst samples. On the known catalyst, the corresponding degrees of CO oxidation are achieved at 220 and 270 ° C, respectively. Ak3U content

The active component in the proposed catalyst is 10-30 wt.%, since reducing the concentration to 5 wt.% and increasing it to 50 wt.% leads to a decrease in catalyst activity.

The proposed catalyst is obtained by simple technology, its synthesis does not require much time (12-1A h, known - 30-40 days), the catalyst contains a much smaller amount of the active component (10-30 wt.%, Known - 85.4- 99 , 4 wt.%), Ecologically safe by the method of preparation. In addition, the high activity of the proposed catalyst allows

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cleaned air with

increased volumetric rate (20 000 h, with the known - 2 700 h).

Claims (1)

Claims A catalyst for purifying exhaust gases from carbon monoxide, comprising a copper-containing component on a carrier, characterized in that, in order to increase the activity of the catalyst, it contains copper oxide as a copper-containing component and schungite as a carrier with the following ratio of components, wt.%: Copper oxide 10.0 - 30.0 Shungite Else th) five ten 20 25 thirty 50 85.4 CuSiOj 95 90 80 75 70 50 14.6 SiO-i