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Method for preparing catalyst for removing CO by selective oxidation

A catalyst and selective technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. It can solve the problems of complex catalyst preparation process and improve metal dispersion and uniformity, large active metal surface area, and reduced metal particle size

Inactive Publication Date: 2010-04-07
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the final catalyst is Pt-Ru / Cs / Al 2 o 3 , the catalyst preparation process is more complex

Method used

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  • Method for preparing catalyst for removing CO by selective oxidation
  • Method for preparing catalyst for removing CO by selective oxidation
  • Method for preparing catalyst for removing CO by selective oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] With RuCl containing equivalent to 0.8gRu 3 solution 45ml, add 20ml of 10g / L PVP solution to the above solution, stir for 1hr, add 6.0g / L NaBH dropwise 4 20ml of aqueous solution, after reduction, PVP-protected ruthenium metal colloid was obtained. Load the metal colloid on a 100g alumina carrier, and dry it at 110°C for 4hrs to finally obtain 0.8% Ru / Al 2 O3 catalyst.

[0029]Catalyst Performance Evaluation:

[0030] Reactor: fixed bed reactor

[0031] Catalyst loading volume: 50ml

[0032] Airspeed: 5000h -1

[0033] Gas volume composition: CO = 1%, CO 2 = 20%, O 2 = 2%, the rest is H 2

[0034] Catalyst activity evaluation see figure 1 and Table 1.

Embodiment 2

[0036] Metal colloids are formulated with RuCl equivalent to 1.6 g Ru 3 solution, all the other catalyst preparation steps are the same as in Example 1.

[0037] This catalyst is tested with the method as in embodiment 1, and its evaluation result sees figure 1 and Table 1.

Embodiment 3

[0039] The metal colloid is prepared with a chloropalladium acid solution equivalent to 0.8gPd, and the rest of the catalyst preparation steps are the same as in Example 1.

[0040] This catalyst is tested with the method as in embodiment 1, and its evaluation result sees figure 2 and Table 1.

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Abstract

The invention provides a method for preparing a catalyst for removing CO from a hydrogen-rich atmosphere by selective oxidation. The catalyst is characterized in that the carrier thereof adopts Al2O3 or SiO2-Al2O3 with the weight percentage of SiO2 being 3-40%; and the active component thereof is one or more than one selected from the following noble metal elements: Ru, Rh, Pd and Pt. Based on a metallic colloid method, the method of the invention for preparing the catalyst comprises the following steps: adding surfactant to the aqueous solution of metal salt of the active components in the noble metal elements; slowly adding reducing agent drop by drop while stirring intensely, so as to obtain stable noble metal colloid with the particle size thereof being 2-10nm through reduction by a reducing agent; properly regulating loading conditions and loading the noble metal colloid onto the carrier, so as to obtain a loading-type metal colloid catalyst; and subjecting the metal colloid catalyst to room-temperature airing, oven-drying and reducing, to obtain the finished catalyst.

Description

Technical field: [0001] The invention relates to the field of catalyst manufacture, and aims to provide a method for preparing a highly active catalyst prepared by a metal colloid method for selectively oxidizing and removing CO in a hydrogen-rich hydrogen source. Background of the invention: [0002] Fuel cell (Fuel Cell) is a new type of energy conversion device, through fuel (such as H 2 ) electrochemical oxidation and oxidant (such as O 2 ) electrochemical reduction directly generates an electric current. Because fuel cell power generation does not go through the combustion process and is not limited by the Carnot cycle, it not only has high energy conversion efficiency, but also does not cause environmental pollution during the power generation process. Therefore, fuel cells are recognized as the preferred clean and efficient energy source in the 21st century, and are used in various aspects such as vehicle power sources, ground power stations, direct alcohol fuel cel...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J23/44B01J23/42B01J37/16C01B3/58
Inventor 于海斌孙彦民苗静姜雪丹赵虹李晓云曾贤君
Owner CHINA NAT OFFSHORE OIL CORP
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