Catalyst for carbon monoxide normal-temperature catalytic and oxidation as well as preparation method and application

A technology for catalytic oxidation and carbon monoxide, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of poor water resistance, can not meet the catalyst performance requirements, easy to deactivate, etc. It is convenient for large-scale industrial use and has the effect of high catalytic oxidation efficiency.

Inactive Publication Date: 2014-04-23
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although non-precious metal catalysts are cheap, they cannot meet people's performance requirements for catalysts due to their poor water resistance and are easily deactivated when exposed to water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 0.462g Ce(NO 3 ) 3 Dissolved in 30 mL of deionized water, added 5 g of activated alumina, and then slowly added 0.140 g (NH 4 ) 2 HPO 4 , stirred at room temperature for 1 hour, filtered and washed, dried in an oven at 50 °C, and finally roasted at 300 °C for 4 hours to prepare 5% CePO 4 / Al 2 o 3 carrier.

[0021] 0.083g PdCl 2 and 0.398g CuCl 2 2H 2 O was dissolved in 10 mL concentrated ammonia water, and 5 g of 5% CePO was added with stirring 4 / Al 2 o 3 The carrier was naturally dried at 50°C, and then calcined at 300°C for 6 hours.

[0022] Catalyst evaluation method: The carbon monoxide oxidation reaction at room temperature was evaluated in an atmospheric pressure fixed-bed U-shaped reactor (with an inner diameter of 5 mm). The raw material gas components used are: 0-200 ppm, the rest is air, the total flow rate is 500mL / min, the catalyst mass is 1 g or 0.3 g, and the corresponding space velocity is 30000 mL / (g h) and 100000 mL / (g h). The normal-pr...

Embodiment 2

[0025] In Example 1, Ce(NO 3 ) 3 and (NH 4 ) 2 HPO 4 The quality was changed into 0.924 g and 0.280 g, and all the other preparation methods and catalyst evaluation methods were the same as in Example 1. The test results showed that, at 30000 mL / (g h), the carbon monoxide conversion rate of the catalyst prepared by this method was up to 99.2%; at 100000 mL / (g h), the carbon monoxide conversion rate of the catalyst prepared by this method was The highest rate is 64.5%.

Embodiment 3

[0027] In Example 1, Ce(NO 3 ) 3 and (NH 4 ) 2 HPO 4 The quality was changed into 1.386 g and 0.420 g, and all the other preparation methods and catalyst evaluation methods were the same as in Example 1. The test results show that at 30000 mL / (g h), the carbon monoxide conversion of the catalyst prepared by this method is up to 99.4%; at 100000 mL / (g h), the carbon monoxide conversion of the catalyst prepared by this method is The highest rate is 59.9%.

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PUM

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Abstract

The invention relates to a catalyst for carbon monoxide normal-temperature catalytic and oxidation as well as a preparation method and application. Palladium chloride and copper chloride are taken as active components of the catalyst, and activated aluminum oxide modified from phosphate acts as a carrier, wherein phosphate is one or two of lanthanum phosphate and cerous phosphate. The activated aluminum oxide carrier modified from phosphate is prepared by a deposition method. Palladium chloride and copper chloride are loaded on the carrier by a dipping method, and the required catalyst is obtained after high-temperature roasting. The catalyst can be used for catalyzing and oxidizing carbon monoxide under the conditions of normal temperature, low concentration and high airspeed, can eliminate carbon monoxide in air effectively, and has high stability.

Description

technical field [0001] The invention relates to a catalyst for catalytic oxidation of carbon monoxide at room temperature and a preparation method thereof. The catalyst is suitable for the catalytic oxidation of carbon monoxide under the conditions of normal temperature, low concentration and high space velocity, especially for the elimination of low concentration carbon monoxide in semi-enclosed spaces such as road tunnels or underground parking lots. Background technique [0002] With the rapid development of my country's urbanization process, the number of urban motor vehicles is also rising. The "Annual Report on Prevention and Control of Motor Vehicle Pollution in China (2010)" released by the Ministry of Environmental Protection pointed out that China's motor vehicle pollution is becoming increasingly serious. In 2009, motor vehicle emissions nationwide were 51.433 million tons of pollutants, including 40.188 million tons of carbon monoxide. For a large amount of low-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01D53/86B01D53/62
CPCY02A50/20
Inventor 高振源刘爽赵昆峰何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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