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Catalyst for oxidative removal of CO in hydrogen-rich gas and preparation and application thereof

A catalyst, hydrogen-rich technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Easy to operate, easy to implement effects

Inactive Publication Date: 2011-01-05
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For CuO x / CeO 2 Catalyst system, in which Ce is a rare earth metal element, its price is still relatively expensive, and it has certain radioactivity, which is not an ideal choice in terms of catalyst cost or environmental pollution

Method used

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  • Catalyst for oxidative removal of CO in hydrogen-rich gas and preparation and application thereof
  • Catalyst for oxidative removal of CO in hydrogen-rich gas and preparation and application thereof
  • Catalyst for oxidative removal of CO in hydrogen-rich gas and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The atomic ratio of Co and Ni is 1: 1 and takes by weighing cobalt nitrate and nickel nitrate respectively and fully dissolving them in distilled water, and getting activated carbon particles with a particle size in the range of 20-80 meshes (the weight of activated carbon and the compound formed by the atomic ratio The ratio of oxide theoretical weight is 6.5: 3.5) impregnated in the obtained solution, evaporated to dryness at 353K under the condition of constant stirring to obtain the raw material, and the obtained raw material was dried at a constant temperature at 373K for 24h (the purpose of constant temperature drying at 373K is to remove the crystal water in the raw material, where the drying time is 10-24h and the purpose of the invention can be realized) to obtain the dry material; then the obtained dry material is heated up to 673K ​​at a rate of temperature increase of 5K / min in an inert environment at room temperature, and then Calcined at constant temperatur...

Embodiment 2

[0037] The constant temperature in the CO oxidation removal process was changed to 423K, and other conditions were the same as in Example 1.

Embodiment 3

[0039] The catalyst was obtained by calcining at 673K ​​for 4 hours, and the CO oxidation removal reaction temperature was 433K, and the rest of the conditions were the same as in Example 1.

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Abstract

The invention discloses a catalyst for oxidative removal of CO in hydrogen-rich gas. In the catalyst, active carbon is taken as a carrier, and an nCoO-mNiO composite oxide formed by non-noble metals such as cobalt and nickel is taken as an active ingredient so that the cost of the catalyst is greatly reduced, and the catalyst has high CO catalytic oxidative activity and selectivity in a low and wide reaction temperature range and can keep more than 99.5 percent of CO conversion rate at a high reaction air speed, effectively reduce the CO concentration in the hydrogen-rich gas to be below 50ppm and meet the standard of a hydrogen fuel for a fuel cell. The invention also discloses a preparation method for the catalyst, which comprises the following steps of: loading a cobalt salt and a nickel salt on the active carbon by a wet immersion method, and then preparing the nCoO-mNiO composite oxide containing low-valence cobalt by high-temperature roasting. The method has the advantages of simple process, mild and easily controlled conditions and good repeatability. The invention discloses application of the catalyst at the same time, which has simple and convenient operation and easy implementation and is very suitable for industrialized popularization.

Description

technical field [0001] The invention relates to a catalyst for selective oxidation removal of carbon monoxide in hydrogen-rich gas, in particular to a non-precious metal catalyst for selective oxidation removal of carbon monoxide in hydrogen-rich gas and its preparation and application. Background technique [0002] Fuel cell is a new type of power generation device that uses hydrogen as fuel. The energy conversion rate can theoretically reach 90%, and the power generation efficiency is much higher than that of the corresponding internal combustion engine. Water is the only product of the reaction, which can effectively avoid environmental pollution. A truly clean energy. The above-mentioned characteristics of the fuel cell make its application in different fields attract much attention, and its related research has become a research hotspot in the past ten years. Proton exchange membrane fuel cell (PEMFC) using hydrogen as fuel is a promising fuel cell for energy generatio...

Claims

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Application Information

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IPC IPC(8): B01J23/755C01B3/58
Inventor 周桂林
Owner CHONGQING TECH & BUSINESS UNIV
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