A kind of preparation method of synthetic gas methanation to produce natural gas catalyst

A catalyst and natural gas technology, which is applied in the field of preparation of supported molybdenum-based catalysts for synthesis gas methanation to natural gas. Facilitate industrial scale-up, reduce concentration difference, and reduce the effect of metal consumption

Active Publication Date: 2018-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the catalysts prepared by the above-mentioned patented methods have obtained better synthesis gas methanation reaction performance, because the reaction is a fast reaction (this kind of fast reaction is generally carried out under the condition of mass transfer control), the reactants in The reaction is completed when it reaches the outer surface of the catalyst, so the inner surface of the catalyst does not contribute much to the target reaction, which results in lower metal utilization in the carrier pores and increases the preparation cost of the catalyst

Method used

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  • A kind of preparation method of synthetic gas methanation to produce natural gas catalyst
  • A kind of preparation method of synthetic gas methanation to produce natural gas catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 2.97g of nickel nitrate and 2.89g of ferric nitrate and dissolve them in 10mL of deionized water to obtain solution A; use equal volume impregnation method to load on 12.9g of alumina carrier (pore volume is 0.73mL / g, specific surface area is 253m 2 / g, strip shape, equivalent diameter 1.5mm), impregnated at room temperature for 2h, aged for 4h, dried at 80°C for 12h, and calcined at 700°C for 4h to prepare catalyst precursor B. The supported Ni was 3% by weight of the final catalyst %, the supported Fe is 2% of the final catalyst based on the weight of the element; the catalyst precursor B is activated in a mixed atmosphere containing hydrogen, the volume content of hydrogen in the mixed gas is 80%, and the reducing conditions are 450 ° C, 0.2 MPa (absolute pressure), the reduction time was 4h; 1.86g of cerium nitrate was dissolved in 15mL of deionized water to obtain solution C, and it was mixed uniformly with 40% furfural aqueous solution with a mass fraction of...

Embodiment 2

[0030] Weigh 2.97g of nickel nitrate and 2.89g of ferric nitrate and dissolve them in 10mL of deionized water to obtain solution A; use equal volume impregnation method to load on 12.9g of silica carrier (pore volume is 0.97mL / g, specific surface area is 372m 2 / g, spherical shape, equivalent diameter 0.5mm), impregnated at room temperature for 2h, aged for 4h, dried at 80°C for 12h, and calcined at 700°C for 4h to prepare catalyst precursor B. The supported Ni was 3% of the final catalyst based on the weight of the element , the supported Fe is 2% of the final catalyst based on the weight of the element; the catalyst precursor B is activated in a mixed atmosphere containing hydrogen, the volume content of hydrogen in the mixed gas is 80%, and the reducing conditions are 450 ° C, 0.2 MPa (absolute pressure ), the reduction time was 4h; 1.86g of cerium nitrate was dissolved in 15mL of deionized water to obtain solution C, and it was mixed uniformly with 40% furfural aqueous solu...

Embodiment 3

[0032] Weigh 0.99g of nickel nitrate and 1.44g of ferric nitrate and dissolve them in 14mL of deionized water to obtain solution A; use equal volume impregnation method to load on 15g of alumina carrier (pore volume is 0.73mL / g, specific surface area is 253m 2 / g, strip shape, equivalent diameter 1.5mm), impregnated at room temperature for 2h, aged for 4h, dried at 80°C for 12h, and calcined at 700°C for 4h to prepare the catalyst precursor B. %, the supported Fe is 1% of the final catalyst based on the weight of the element; the catalyst precursor B is activated in a mixed atmosphere containing hydrogen, the volume content of hydrogen in the mixed gas is 80%, and the reducing conditions are 450 ° C, 0.2 MPa (absolute pressure), the reduction time was 4h; 0.62g of cerium nitrate was dissolved in 15mL of deionized water to obtain solution C, and it was mixed uniformly with 40% furfural aqueous solution with a mass fraction of 4 times its mass, and then mixed with the reduced and...

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Abstract

The invention relates to a method for preparing a catalyst for preparation of natural gas by methanation of a synthetic gas, the catalyst comprises a first active component, a second active components, a first aid, a second aid and a carrier; the method for preparing the catalyst comprises the following steps: firstly, preparing a catalyst precursor B, then reducing the catalyst precursor B, mixing evenly a solution C and a furfural aqueous solution, adding the solution C, the furfural aqueous solution and the catalyst precursor B into a high-pressure reaction kettle, adding a solution D for reaction, processing and separating a solid and liquid mixture, filtering the obtained solid sample, drying and roasting to obtain the catalyst. The catalyst prepared by the method has high reaction activity, the metal use amount is reduced, and the selectivity of methane is improved.

Description

technical field [0001] The invention relates to a preparation method of a synthesis gas methanation to natural gas catalyst, in particular to a preparation method of synthesis gas methanation to natural gas supported molybdenum-based catalyst. Background technique [0002] Methanation refers to CO / CO 2 with H 2 Under certain temperature, pressure and catalyst action, generate CH 4 At present, this reaction is widely used in the removal of trace carbon in the synthesis of ammonia or hydrogen production, methanation of coke oven gas, and coal-to-natural gas. Methanation is an important catalytic technology, especially in fuel applications, where it can be used to increase the calorific value of gas, allowing the conversion of coke oven gas, coal or biomass to natural gas. In recent years, with the rapid development of my country's coal-based natural gas industry, methanation, one of the core technologies, has received more and more attention. [0003] China is a country ri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887
CPCB01J23/8871
Inventor 任金晨
Owner CHINA PETROLEUM & CHEM CORP
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