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Preparation method of CO catalytic material

A catalytic material and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, separation methods, etc., can solve the problems such as the lack of supported gold catalytic materials, the inability to play an effective role, the difficulty of catalytic materials, etc. Simple process, good strength and great feasibility

Inactive Publication Date: 2007-07-18
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the pretreatment is more complicated, and at room temperature, it cannot play an effective role
However, if gold is supported on a single carrier Al 2 o 3 In general, supported gold catalytic materials with low-temperature activity are generally not available. If gold is supported on a single transition metal oxide, the prepared catalytic materials generally have considerable difficulties in the process of industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 1.0 g of spherical alumina trioxide soaked in a cobalt nitrate aqueous solution of a predetermined concentration, soak in an equal volume, keep it for 3 hours, then dry at 110°C for 6 hours, and calcinate at 600°C for 1 hour to obtain an alumina trioxide composite containing co-catalyst Carrier. Take 0.5 mL of 0.1M chloroauric acid solution, add it to distilled water, and use 0.5M Na under strong stirring 2 CO 3 The pH of the solution was adjusted to 7.0. Heat and maintain the system temperature at 70°C. Take 1.0g of the molded composite oxide carrier, add it to the solution, then pass in steam, keep in the steam environment for 10 hours, then age, filter, wash, dry at 90°C for 12 hours, and then calcinate at 400°C. You can get Au: Co: Al 2 O 3 Catalytic material with a weight ratio of 1:10:100. The finished product is in the shape of a small ball with a uniform black color and the strength is greater than 60N / particle.

[0021] The raw gas composition is CO: 1.5%, O 2...

Embodiment 2

[0023] Take 1.0 mL of 0.1M chloroauric acid solution, add it to distilled water, and adjust the pH to 7.5 with 0.5M ammonia solution under vigorous stirring. Heat and maintain the system temperature at 70°C. Take 1.0 g of the composite carrier described in Example 1 and add it to the solution, and then steam it. After keeping it in the steam environment for 10 hours, it is aged, filtered, washed, dried at 90°C for 12 hours, and then calcined at 400°C. You can get Au: Co: Al 2 O 3 Catalytic material with a weight ratio of 1:10:100. The finished product is in the shape of a small ball with a uniform black color. .

[0024] When using the raw gas and gas volumetric space velocity described in Example 1, the catalytic material catalyzes the complete conversion of CO to CO 2 The minimum allowable reaction temperature is lower than 38℃.

Embodiment 3

[0026] Take 1.0 mL of 0.1M chloroauric acid solution, add it to distilled water, and adjust the pH to 7.5 with 4 grams of urea solution under vigorous stirring. Heat and maintain the system temperature at 80°C. Iron-containing composite carrier Al prepared as described in Example 1 2 O 3 1.0g was added to the solution, and then steam was introduced. After keeping in the steam environment for 6 hours, it was aged, filtered, washed, dried at 90°C for 12 hours, and then calcined at 400°C to obtain Au:Fe: Al 2 O 3 Au / NiO with a weight ratio of 1:10:50 x / Al 2 O 3 Catalytic material. The finished product is in the shape of small balls and is uniform iron red.

[0027] When using the raw gas and gas volumetric space velocity described in Example 1, the catalytic material catalyzes the complete conversion of CO to CO 2 The minimum allowable reaction temperature is lower than -30℃.

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Abstract

A catalyst for removing CO is composed of Au as active component, the co-catalyst chosen from Co, Fe, Mn, Cu, Zn, Ti, Sn, Mg, Li, Ce and Zr, and the porous carrier chosen from alumina, silicon oxide, molecular sieve, cellular ceramics and iron wire mesh. Its preparing process is also disclosed.

Description

Technical field [0001] The present invention is a new preparation method, and the corresponding catalytic material prepared by the preparation method can purify CO in the environment at low temperature or even normal temperature. Its application range includes coal mine self-rescuers against CO, high-rise building escape masks, or other devices used to protect CO, CO 2 Lasers, CO sensors, and CO purification in some special or enclosed environments. Background technique [0002] The CO purification catalyst material used for a long time in the past was Hopcalite. It was jointly invented by Johns Hopkins University and the University of California in 1919. It is a catalytic material made of active manganese dioxide and copper oxide in a certain proportion. Generally, the preparation method of Hopcalite catalytic material is the sulfuric acid method. The first step is to produce active manganese dioxide, which is to mix manganese sulfate fine powder (below 70 mesh) with a small amo...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J37/02B01J32/00B01J35/10B01J23/66B01D53/62
Inventor 王东辉史喜成程代云董同欣
Owner NO 63971 TROOPS PLA
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