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CO selective methanation monolithic catalyst and preparation method thereof

A monolithic catalyst, selective technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. The catalyst has the problems of low reaction temperature and high content of precious metals, so as to achieve the effect of improved catalytic activity and stability, good mechanical strength and high catalytic performance

Active Publication Date: 2009-12-23
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this catalyst is that its high precious metal content leads to higher production costs
[0010] Compared with Ni-based catalysts, Ru-based catalysts have the advantages of low catalyst reaction temperature, high activity and selectivity, but the above-mentioned Ru-based catalysts have a relatively narrow reaction temperature range and their reaction temperature is deeply affected by gas space velocity.

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  • CO selective methanation monolithic catalyst and preparation method thereof

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Embodiment 1

[0034] A monolithic catalyst for CO selective methanation, including active component Ru, cordierite honeycomb ceramic carrier, and nano-cerium-zirconium composite oxide as a carrier, wherein the molar ratio of Ce and Zr is 3:1; nano-cerium-zirconium The composite oxide coating amount is 15wt% of the cordierite honeycomb ceramic carrier; the content of Ru accounts for 0.5wt% of the catalyst; it is characterized by TEM, such as figure 1 As shown, the particle diameter of the nano-cerium-zirconium composite oxide carrier is 5-20nm, mostly 5-10nm. The preparation method is as follows:

[0035] (1) the nitrate that the mol ratio is 3: 1 Ce: Zr is dissolved in deionized water, is configured into the solution of concentration 0.2mol / L; Concentration is that the industrial ammonia water of 25% is diluted 1.5 times as precipitating agent, in continuous Under stirring, add the above-mentioned salt solution dropwise to the above-mentioned precipitant at a rate of 5ml / min, and control the...

Embodiment 2

[0041] A monolithic catalyst for CO selective methanation, including active component Ru, cordierite honeycomb ceramic carrier, and nano-cerium-zirconium composite oxide as carrier, wherein the molar ratio of Ce and Zr is 1:3; nano-cerium-zirconium The composite oxide coating amount is 10wt% of the cordierite honeycomb ceramic carrier; the Ru content accounts for 0.2wt% of the catalyst; the particle diameter of the nano-cerium-zirconium composite oxide carrier is 5-20nm, mostly 5-10nm. The preparation method is as follows:

[0042] (1) be that the nitrate of Ce: Zr that molar ratio is 1: 3 is dissolved in deionized water, is configured into the solution of concentration 0.2mol / L; Concentration is that the industrial ammonia water of 25% is diluted 1.5 times as precipitation agent, in continuous Under stirring, add the above-mentioned salt solution dropwise to the above-mentioned precipitant at a rate of 5ml / min, and control the pH to 13. After the precipitation is complete, ag...

Embodiment 3

[0048] A monolithic catalyst for CO selective methanation, including active component Ru, cordierite honeycomb ceramic carrier, and nano-cerium-zirconium composite oxide as carrier, wherein the molar ratio of Ce and Zr is 1:6; nano-cerium-zirconium The composite oxide coating amount is 20wt% of the cordierite honeycomb ceramic carrier; the Ru content accounts for 2wt% of the catalyst; the particle diameter of the nano-cerium-zirconium composite oxide carrier is 5-20nm, mostly 5-10nm. The preparation method is as follows:

[0049] (1) be that the nitrate of Ce: Zr that molar ratio is 1: 6 is dissolved in deionized water, is configured into the solution of concentration 0.2mol / L; Concentration is that the industrial ammonia water of 25% is diluted 1.5 times as precipitation agent, in continuous Under stirring, add the above-mentioned salt solution dropwise to the above-mentioned precipitant at a rate of 5ml / min, and control the pH to 11. After the precipitation is complete, age ...

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Abstract

The invention discloses a CO selective methanation monolithic catalyst and a preparation method thereof, in particular relates to a CO selective methanation monolithic catalyst using nanometer cerium-zirconium composite oxide as a carrier and a preparation method thereof. The catalyst comprises an active ingredient Ru, a porous material matrix and the nanometer cerium-zirconium composite oxide carrier, wherein the mol ratio of Ce to Zr is 1-36:6; the coating quantity of the nanometer cerium-zirconium composite oxide is 6-30 wt % of that of the porous material matrix; the content of Ru is 0.2-2 wt % of that of the catalyst; and the particle diameter of the nanometer cerium-zirconium composite oxide carrier is 5-20nm. The CO selective methanation monolithic catalyst has good activity and high strength, has high selectivity in the whole reaction temperature area, greatly prevents the unnecessary consumption of hydrogen in reformed gas, and has simple preparation technology and relativelylow cost.

Description

technical field [0001] The invention relates to a monolithic catalyst for CO selective methanation and a preparation method thereof, in particular to a monolithic catalyst for CO selective methanation with nano-cerium-zirconium composite oxide as a carrier and a preparation method thereof. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is a power generation device that directly converts chemical energy into electrical energy through electrochemical reactions. Compared with traditional power generation devices, it has high energy conversion efficiency, no pollution, low noise, and adaptability With the advantages of different power requirements, it has broad application prospects as a fixed power supply (such as a power station) and a mobile power supply for electric vehicles, submarines, aerospace, etc. One form of energy. As the fuel of the PEMFC system, hydrogen mainly comes from the reforming reaction of methanol or natural gas, so 2-15% CO will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C07C1/04C07C9/04H01M8/06H01M8/0668
CPCY02E60/50
Inventor 肖钢孙伟华周帅林喻瑶
Owner HANERGY TECH
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