Method for preparing catalyst for preparing synthesis gas by reforming methane and carbon dioxide

A carbon dioxide and catalyst technology, which is applied in the field of preparing synthesis gas catalysts by methane-carbon dioxide reforming, can solve the problems of low reaction performance, loss of active components, high cost and the like, and achieves good carbon deposition resistance, good catalytic activity, Highly selective effect

Inactive Publication Date: 2010-02-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The noble metal system is to support the active component noble metals (Pt, Pd, Rh, Ru, Ir) on alumina, silica, magnesia, zirconia, titania and other supports. The advantage of this system is that it has good anti-coking performance, but the reaction performance is slightly low, and the cost is expensive; the non-noble metal system is nickel or cobalt loaded on alumina, silica, magnesia, zirconia, titania and other carriers, an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dry γ-alumina at 110°C for 4 hours, impregnate it with the mixed aqueous solution of cerous nitrate and lanthanum nitrate at room temperature for 8 hours by equal volume impregnation method, then dry it at 110°C for 4 hours, and then in air atmosphere at 600°C Roast for 4 hours. The modified support was immersed in nickel acetate solution at room temperature for 8 hours, then dried at 110° C. for 4 hours, and then calcined at 600° C. in air for 4 hours. The catalyst precursor (I) was obtained by immersing the impregnated active component nickel sample in chloroplatinic acid solution for 8 hours at room temperature, and then roasting at 600° C. for 4 hours in an air atmosphere. The total mass content of cerium oxide and lanthanum oxide in the catalyst is 1%, wherein the molar ratio of cerium oxide and lanthanum oxide is 1:1, the content of nickel is 10%, and the content of platinum is 0.02%.

[0021] The performance test of the prepared catalyst in the reaction of metha...

Embodiment 2

[0023] Nickel-aluminum spinel (NiAl 2 o 4 ) as a carrier, without Ni salt impregnation process, others are the same as in Example 1, and the prepared catalyst precursor is (II). The test method of catalyst reaction performance is the same as embodiment 1, and the catalyst methane conversion ratio prepared by precursor (II) is 96.2%, and carbon dioxide conversion ratio is 92.3%, and product CO, H 2 The selectivities are respectively: 97.5%, 97.6%.

Embodiment 3

[0025] Dry γ-alumina at 110°C for 4 hours, use the equal volume impregnation method to impregnate the mixed aqueous solution of cerous nitrate, lanthanum nitrate, and nickel nitrate at room temperature for 12 hours, then dry at 110°C for 4 hours, and then in the air atmosphere Calcined at 800°C for 2 hours. The catalyst precursor (III) was obtained by immersing a sample impregnated with nickel as an active component in a chloroplatinic acid solution for 12 hours at room temperature, and then calcining at 800° C. for 4 hours in an air atmosphere. The total mass content of cerium oxide and lanthanum oxide in the catalyst is 1%, wherein the molar ratio of cerium oxide and lanthanum oxide is 1:1, the content of nickel is 10%, and the content of platinum is 1.0%. The test method of the catalyst reaction performance is the same as that of Example 1. The methane conversion rate of the catalyst prepared by the precursor (III) is 96.0%, and the carbon dioxide conversion rate is 92.0%. ...

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Abstract

The invention relates to a method for preparing a catalyst for preparing synthesis gas by reforming methane and carbon dioxide, which comprises the following steps: soaking a carrier into a mixed solution of cerium(III) nitrate and lanthanum nitrate, and drying and roasting the soaked carrier for 2 to 10 hours to obtain a modified carrier (A); soaking the (A) into a soluble nickel salt solution orsoaking the (A) into a chloroplatinic acid solution, and drying and roasting the soaked carrier to obtain (B) or (C); soaking the (B) into the chloroplatinic acid solution or soaking the (C) into thesoluble nickel salt solution, and drying and roasting the soaked carrier to obtain a catalyst precursor, or soaking the modified carrier into a mixed solution of the soluble nickel salt solution andthe chloroplatinic acid, and drying and roasting the soaked carrier to obtain a catalyst precursor; and reducing the precursor in hydrogen and nitrogen mixed gas to obtain the catalyst. The catalyst has the advantages of low cost, good catalytic activity under the reaction condition of large space velocity, high selectivity for H2 and CO, and good sintering resistance and carbon deposition resistance.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for preparing synthesis gas by reforming methane-carbon dioxide. Background technique [0002] The main component of natural gas - methane is a high-quality and clean energy source. With the change of 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. Natural gas-steam reforming to synthesis gas is a very mature technology route, which is widely used in industrial hydrogen production process, but the process consumes a lot of energy and has a high ...

Claims

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Application Information

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IPC IPC(8): B01J23/89C01B3/40
Inventor 宫立倩李正刘季陈吉祥
Owner PETROCHINA CO LTD
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