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A heteromethanation catalyst and its molding process and application

A methanation catalyst, catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve the effect of improving utilization efficiency, improving activity, and increasing active surface

Active Publication Date: 2018-08-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Domestic universities, scientific research institutes and energy groups have also developed numerous high-temperature complete methanation catalysts, such as CN200910187675.0, CN201010223996.4, CN201010127840.6, CN201110351012.5, CN201110336259.X, etc., but mainly focus on the formula and the invention of synthetic methods, basically no information on catalyst configuration

Method used

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  • A heteromethanation catalyst and its molding process and application
  • A heteromethanation catalyst and its molding process and application
  • A heteromethanation catalyst and its molding process and application

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Mix 1 kg of methanation catalyst powder with a NiO weight percentage of less than 0.15 mm and 22 g of graphite and put it into a wet mixer, and continuously mix 400 ml of the powder with a mass concentration of 3 %HNO 3 The aqueous solution is sprayed onto the surface of the mixed powder in the form of mist, and the wet mixing is continued for 60 minutes after all the liquid is sprayed in. The obtained mixed powder wet material is granulated by a granulator, and then used a chipping machine to make a cylindrical particle catalyst with an outer diameter of Φ18 mm, a height of 10 mm, and 5 through holes of Φ4 mm evenly distributed on the cross section. The catalyst particle surface area / particle skeleton volume ratio is 0.82mm 2 / mm 3 , the maximum radial mass transfer distance is 2.62mm, and the lateral pressure is 154N / cm. Marked as embodiment 1, its cross-sectional structure size sees figure 1 . The above-mentioned methanation catalyst of Example 1 was applied to ...

Embodiment 2

[0046] Mix 1kg of methanation catalyst powder with a particle size of less than 0.15mm and a NiO weight percentage of 45% with 22g of graphite and 50g of 425 cement, then put it into a wet mixer, and continuously 450ml mass concentration is 3% HNO 3 The aqueous solution is sprayed onto the surface of the mixed powder in the form of mist, and the wet mixing is continued for 60 minutes after all the liquid is sprayed in. The obtained mixed powder wet material was granulated by a granulator, and then used a chipping machine to make a cylindrical particle catalyst with an outer circle diameter of Φ18mm, a height of 10mm, and 7 through holes of Φ4mm evenly distributed on the cross section. The catalyst particle surface area / particle skeleton volume ratio is 1.07mm 2 / mm 3 , the maximum mass transfer distance in the radial direction is 1.73mm, and the lateral pressure is 121N / cm. Marked as embodiment 2, its cross-sectional structure size sees figure 2 .

[0047] The above-ment...

Embodiment 3

[0049] Mix 1kg of methanation catalyst powder with a particle size of less than 0.15mm and a NiO weight percentage of 60% with 22g of graphite and 50g of 425 cement, then put it into a wet mixer, and continuously 400ml mass concentration is 3% HNO 3 The aqueous solution and 50 ml of polyvinyl alcohol (PVA) with a mass concentration of 3% are sprayed onto the surface of the mixed powder in mist form, and the wet mixing is continued for 60 minutes after all the liquid is sprayed in. The obtained mixed powder wet material is granulated by a granulator, and then made into a cylinder with a circumscribed circle diameter of Φ10mm, a height of 5mm, a Φ3mm through hole in the center of the cross section, and a four-leaf petal shape in the cross section. Particulate catalysts, the dimensions of the cross-sectional structure see image 3 . The catalyst particle surface area / particle skeleton volume ratio is 1.18mm 2 / mm 3 , the maximum mass transfer distance in the radial direction ...

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Abstract

The invention discloses a hetero-methanation catalyst, its molding process and application. The process is to make the nickel-based synthesis gas methanation catalyst powder by pressing or extruding. , The maximum mass transfer distance in the radial direction is 1.4-4.0mm, and the geometric shape is regular and symmetrical porous cylindrical particles. The heterogeneous methanation catalyst molding process provided by the invention is aimed at the process characteristics and requirements of each stage of the synthesis gas methanation process, which can not only improve the utilization efficiency of the active components of the catalyst, but also reduce the bed resistance drop and improve the long-term operation stability of the catalyst. all play an important role.

Description

technical field [0001] The invention relates to a synthetic gas methanation catalyst, in particular to a heterogeneous methanation catalyst and its forming process and application. Background technique [0002] In recent years, due to the increase in my country's natural gas consumption and the widening gap between supply and demand, the price of natural gas has continued to rise, and the synthesis gas (CO+H 2 ) methanation process to replace natural gas (Substitute Natural Gas, SNG) has been widely valued by the industry, and is considered to be one of the important means to alleviate the contradiction between supply and demand of natural gas in my country. The main reactions in the process of producing SNG from syngas through methanation reaction are as follows: [0003] CO+3H 2 →CH 4 +H 2 O △ H 0 =-206kJ / mol (1) [0004] 2CO+2H 2 →CH 4 +CO 2 ΔH 0 =-247kJ / mol (2) [0005] CO 2 +4H 2 →CH 4 +2H 2 O △ H 0 =-165kJ / mol (3) [0006] Reactions (1) and (2) are th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/25B01J23/755C07C9/04C07C1/04C07C1/12
Inventor 王树东袁中山张建国周谨高典楠杨晓野
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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