Catalyst for producing synthesis gas by catalytic partial oxidation of methane and preparation thereof

A methane catalytic part and catalyst technology, applied in the field of catalysts for synthesis gas preparation, can solve problems affecting industrial applications, deactivation, loss of active components, etc., achieve good anti-sintering and anti-carbon performance, low production cost, and selectivity sex high effect

Active Publication Date: 2008-10-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, one of the main problems in the partial oxidation of methane to synthesis gas is that the catalyst is deactivated due to carbon deposition, sintering or loss of active components during use, which affects the industrial application of the process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dry α-alumina at 110°C for 4 hours, use the equal volume impregnation method to impregnate the mixed aqueous solution of cerous nitrate and calcium nitrate at room temperature for 12 hours, then dry at 110°C for 4 hours, and then in the air atmosphere at 600°C Roast for 2 hours. The modified support was immersed in nickel nitrate solution at room temperature for 12 hours, then dried at 110°C for 4 hours, and then calcined at 600°C for 4 hours in air. A sample impregnated with nickel as the active component was immersed in a ruthenium trichloride solution for 12 hours at room temperature, then dried at 110°C for 4 hours, and then calcined at 600°C for 4 hours in an air atmosphere to obtain a catalyst precursor (I). The total mass content of cerium oxide and calcium oxide in the catalyst is 1%, wherein the molar ratio of cerium oxide and calcium oxide is 1:1, the content of nickel is 10%, and the content of ruthenium is 0.5%.

[0036] The performance test of the prepared...

Embodiment 2

[0039] Using magnesia-aluminum spinel as the carrier, using the equal volume impregnation method to impregnate the mixed aqueous solution of cerous nitrate and zirconium nitrate at room temperature for 12 hours, then dry at 110°C for 4 hours, and then bake at 600°C in air atmosphere for 2 hours . The prepared catalyst precursor is (II). Others are with embodiment 1.

[0040] The process of preparing the catalyst from the precursor is the same as in Example 1.

[0041] The test method of catalyst reaction performance is the same as embodiment 1, by the catalyst methane conversion rate and CO prepared by precursor (II), H 2 The selectivities are: 96.2%, 94.5%, 97.0%.

Embodiment 3

[0043] The aluminum-barium composite oxide is used as the carrier, and the others are the same as in Example 1, and the prepared catalyst precursor is (III). The process of preparing the catalyst from the precursor is the same as in Example 1.

[0044] The test method of catalyst reaction performance is the same as embodiment 1, by the prepared catalyst methane conversion rate and CO of precursor (III), H 2 The selectivities are: 96.0%, 95.0%, 96%.

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PUM

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Abstract

The present invention provides a catalyst for preparing a compound gas by methane catalyzing partial oxidation and a preparation method thereof. The catalyst relates to a loading type catalyst which is added with a cerium oxide-based compound accessory ingredient and a noble metal ruthenium; wherein, the content of nickel is 5 to 15 percent (weight percent, the same below), the content of the cerium oxide-based compound accessory ingredient is 0.1 to 5 percent, the content of ruthenium is 0.1 to 0.2 and the rest is the content of a carrier. The catalyst has excellent reaction property; the methane converting rate as well as the selectivity of CO and H2 is all higher than 95 percent; besides, the stability is excellent.

Description

technical field [0001] The invention relates to a catalyst for preparing synthesis gas by converting methane and its preparation, and belongs to the technical field of catalysts for preparing synthesis gas. Background technique [0002] Methane, the main component of natural gas, is a high-quality and clean energy source. With the changes in the world's energy structure, natural gas will become one of the most important energy sources in the 21st century. The chemical application of natural gas is mainly achieved through the preparation of synthesis gas, that is, the production of synthesis gas from natural gas is the "leading" step in the natural gas chemical industry. Natural gas catalytic conversion to synthesis gas mainly includes steam reforming, carbon dioxide reforming, partial oxidation of methane and mixed reforming processes. Among them, compared with steam reforming and carbon dioxide reforming, the partial oxidation process of methane has the following obvious a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/83C01B3/36C01B31/18C01B32/40
Inventor 陈吉祥宫立倩邱业君李正张继炎张德胜赵胤
Owner PETROCHINA CO LTD
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