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Salt mist-resistant moisture-resistant catalyst for removing carbon monoxide at low temperature

A carbon monoxide and salt spray-resistant technology, which is applied to catalysts for eliminating carbon monoxide at low temperature, salt spray-resistant and humidity-resistant fields, can solve the problems of common catalysts such as salt spray resistance, poor humidity resistance, unsatisfactory high temperature stability, and poor anti-poisoning performance. To achieve good CO elimination performance, enhanced catalytic activity and stability, strong resistance to salt spray and humidity

Active Publication Date: 2011-10-12
DALIAN SAMAT NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the platinum-palladium catalyst has the advantages of high activity, good moisture resistance and long life, it is expensive, has poor anti-poisoning performance, and is not ideal for high temperature stability.
However, the use environment of the catalyst itself is complex, such as coastal cities, ships, submarines and other salt spray phenomena are serious, and ordinary catalysts have poor resistance to salt spray and humidity.

Method used

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  • Salt mist-resistant moisture-resistant catalyst for removing carbon monoxide at low temperature
  • Salt mist-resistant moisture-resistant catalyst for removing carbon monoxide at low temperature
  • Salt mist-resistant moisture-resistant catalyst for removing carbon monoxide at low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Weigh 21.71gCe(NO 3 ) 3 ·6H 2 O and 21.45g Zr(NO 3 ) 4 ·5H 2 O was mixed and dissolved in 250ml deionized water, 21g of citric acid was weighed and dissolved in 220ml of deionized water, 30ml of 90% ethanol was added to aid dissolution, the citric acid solution dissolved by ethanol was dropped into the cerium-zirconium mixed solution, stirred at room temperature for 3h, and Distill under pressure to remove a certain amount of ethanol and water until the solution forms a yellow flowable gel. Foam at 120°C for 5 hours, and the obtained solid foam is calcined at 600°C for 5 hours to obtain cerium-zirconium composite oxide, which is ground and used for later use.

[0020] 2. Weigh 45.5g γ-A 2 o 3 , 73.7g of manganese carbonate, 4g of high alumina cement, adding 5g of the above-mentioned cerium-zirconium composite oxide, rolling into a ball, drying at 120°C for 3h, and roasting at 450°C for 5h to make a carrier.

[0021] 3. Weigh 0.5gPdCl respectively 2 and 0.27gH...

Embodiment 2

[0023] 1. Weigh 43.4gCe(NO 3 ) 3 ·6H 2 Dissolve O in 250ml of deionized water, weigh 21g of citric acid and dissolve in 220ml of deionized water, add 30ml of 90% ethanol to aid dissolution, drop the citric acid solution aided by ethanol into the mixed solution of cerium and zirconium, stir at room temperature for 3h, and decompress Distill to remove a certain amount of ethanol and water until the solution forms a yellow flowable gel, foam at 120°C for 5 hours, and roast the obtained solid foam at 600°C for 5 hours to obtain cerium-zirconium composite oxide, grind it, and set aside.

[0024] 2. Weigh 74g γ-A 2 o 3 , manganese carbonate 24.5g, 1g squash rubber powder, add 10g of the above-mentioned cerium-zirconium composite oxide, roll into a ball, dry at 120°C for 3h, and roast at 450°C for 5h to make a carrier.

[0025] 3. Weigh 3.34gPdCl respectively 2 and 2.66gH 2 PtCl 6 ·6H 2 Dissolve O in deionized water, dilute to 90ml, add 100g of the above-mentioned carrier, pl...

Embodiment 3

[0027] 1. Weigh 30.4gCe(NO 3 ) 3 ·6H 2 O and 12.87g Zr(NO 3 ) 4 ·5H 2 O was mixed and dissolved in 250ml deionized water, 21g of citric acid was weighed and dissolved in 220ml of deionized water, 30ml of 90% ethanol was added to aid dissolution, the citric acid solution dissolved by ethanol was dropped into the cerium-zirconium mixed solution, stirred at room temperature for 3h, and Distill under pressure to remove a certain amount of ethanol and water until the solution forms a yellow flowable gel. Foam at 120°C for 5 hours, and the obtained solid foam is calcined at 600°C for 5 hours to obtain cerium-zirconium composite oxide, which is ground and used for later use.

[0028] 2. Weigh 78g γ-A 2 o 3 , 30.8g of manganese carbonate, 2g of high alumina cement, adding 1g of the above-mentioned cerium-zirconium composite oxide, rolling into a ball, drying at 120°C for 3h, and roasting at 450°C for 5h to make a carrier.

[0029] 3. Weigh 1.67gPdCl respectively 2 and 1.33gH ...

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Abstract

The invention discloses a salt mist-resistant moisture-resistant catalyst for removing carbon monoxide at low temperature, in particular a catalyst and a preparation method thereof, and belongs to the technical field of chemical engineering. The catalyst is characterized by consisting of a carrier and active metals, wherein the carrier is a mixture of alumina, manganese oxide, cerium zirconium composite oxide of CexZr1-xO2 and a small amount of adhesive; a mass ratio of the alumina to the manganese oxide is (1-5):1; the cerium zirconium composite oxide is 1 to 10 mass percent of the carrier, and x is more than or equal to 0.5 and less than or equal to 1; the adhesive is 0.5 to 5 mass percent of the carrier; and the active metals are Pt and Pb, wherein the Pt is 0.1 to 1 mass percent of the carrier, and the Pd is 0.3 to 2 mass percent of the carrier. The invention has the advantage that: the prepared catalyst is low in cost, high in low temperature catalytic activity, high salt mist resistance and moisture resistance, and high stability.

Description

technical field [0001] The invention relates to a catalyst in the technical field of chemical industry and a preparation method thereof, in particular to a salt-spray-resistant, moisture-resistant, low-temperature catalyst for eliminating carbon monoxide. Background technique [0002] With the rapid development of my country's economic construction, the combustion of chemical fuels, the chemical industry and the use of motor vehicles will produce dense smoke, high-concentration CO gas and other harmful gases, which will cause great harm to personnel. In addition, CO is poisoned to death by coal mine accidents main harmful ingredients. Therefore, it is imperative to prepare excellent CO oxidation catalysts to cope with complex environmental factors. In addition, CO catalytic oxidants under normal temperature and humidity conditions have shown broad application prospects in closed internal circulation CO lasers, CO gas detectors, indoor air purification, and elimination of tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656B01D53/86B01D53/62
CPCY02A50/20
Inventor 王舫滕显俊高绪国裴廷芳
Owner DALIAN SAMAT NEW MATERIAL CO LTD
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