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A composite component methanation catalyst and its preparation method

A methanation catalyst and methanation technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of unfavorable industrial application of ruthenium loading and high catalyst cost , the problem of high activation temperature, to achieve the effect of favorable dispersion, high methanation activity and selectivity, and low activation temperature

Active Publication Date: 2020-04-17
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the Ni-based catalysts widely used in industrial devices have a high activation temperature, so that the raw material gas in the methanation device needs to be preheated to reach a higher temperature before the methanation reaction can be carried out, which is not conducive to the progress of the reaction.
Moreover, in order to cope with the high load of the methanation process, the catalyst needs to be loaded with higher Ni, which makes the cost of the catalyst higher
Ruthenium has excellent low-temperature methanation activity, but due to its noble metal properties, too high ruthenium loading is not conducive to its industrial application

Method used

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  • A composite component methanation catalyst and its preparation method
  • A composite component methanation catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of composite component methanation catalysts.

[0038] The preparation method comprises the following steps:

[0039] Step 1: Prepare the carrier precursor

[0040] 256g Mg(NO 3 ) 2 ·6H 2 Add 3000mL deionized water to dissolve O, and add 204g γ-Al to the solution 2 o 3 and 80g anatase TiO 2 , after fully stirring and infiltrating, slowly add 5% K 2 CO 3 solution until the pH of the mixed solution was 9. Filter the mixed solution and wash the filter cake until there is no NO 3 - residue. The filter cake was dried at 105° C. for 4 hours, calcined at 400° C. for 5 hours, and passed through a 20-mesh sieve to obtain a carrier precursor.

[0041] Step 2: Prepare the carrier

[0042] The carrier precursor was added with 15% water and 3% graphite by mass, mixed uniformly, pressed and molded, and calcined at 700° C. for 6 hours to obtain a carrier.

[0043] Step 3: Dipping

[0044] Take 1.52g RuCl 3 , 88.00g Ni(NO 3 ) 2 ·6H 2 O, 0.86gLa(NO 3 ) 3 ...

Embodiment 2

[0048] Preparation of composite component methanation catalysts.

[0049] The preparation method comprises the following steps:

[0050] Step 1: Prepare the carrier precursor

[0051] 256g Mg(NO 3 ) 2 ·6H 2 O was dissolved in 3000mL deionized water, and 153g γ-Al was added to the solution 2 o 3 and 40g anatase TiO 2 , after fully stirring and infiltrating, slowly add 5% K 2 CO 3 solution until the pH of the mixed solution was 9. Filter the mixed solution and wash the filter cake until there is no NO3 - residue. The filter cake was dried at 105° C. for 4 hours, calcined at 400° C. for 5 hours, and passed through a 20-mesh sieve to obtain a carrier precursor.

[0052] Step 2: Prepare the carrier

[0053] The carrier precursor was added with 15% water and 3% graphite by mass, mixed uniformly, pressed into shape, and calcined at 800° C. for 6 hours to obtain the carrier.

[0054] Step 3: Dipping

[0055] Take 1.82g RuCl 3 , 90.40g Ni(NO 3 ) 2 ·6H 2 O, 0.93gLa(NO ...

Embodiment 3

[0059] Preparation of composite component methanation catalysts.

[0060] The preparation method comprises the following steps:

[0061] Step 1: Prepare the carrier precursor

[0062] 256Mg(NO 3 ) 2 ·6H 2 O, add 3000mL deionized water to dissolve, add 102g γ-Al to the solution 2 o 3 and 53.33g anatase TiO 2 , after fully stirring and infiltrating, slowly add 5% K 2 CO 3 solution until the pH of the mixed solution was 9. Filter the mixed solution and wash the filter cake until there is no NO 3 - residue. The filter cake was dried at 105° C. for 4 hours, calcined at 400° C. for 5 hours, and passed through a 20-mesh sieve to obtain a carrier precursor.

[0063] Step 2: Prepare the carrier

[0064] The carrier precursor was added with 15% water and 3% graphite by mass, mixed uniformly, pressed into shape, and calcined at 700° C. for 6 hours to obtain a catalyst carrier.

[0065] Step 3: Dipping

[0066] Take 3.05g RuCl 3 , 37.89g Ni(NO 3 ) 2 ·6H 2 O, 1.30gLa(NO ...

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Abstract

The invention discloses a composite component methanation catalyst and a preparation method thereof. The composite component methanation catalyst comprises a carrier, and active components and an active assistant which are loaded on the carrier, the active components comprise nickel oxide and ruthenium dioxide, the active assistant is lanthana, and the carrier is an alumina, titanium dioxide and magnesium oxide composite oxide; and the catalyst concretely comprises, by mass, 3-10% of NiO, 0.2-1% of RuO2, 18-30% of TiO2, 40-55% of Al2O3, 10-25% of MgO, and 0.5-5% of La2O3. The preparation method comprises the following steps: preparing a carrier precursor; preparing the carrier; impregnating the carrier in an impregnating solution by adopting an isopyknic impregnating technology; and drying and calcining the impregnated carrier to obtain the catalyst. The composite methanation catalyst has the advantages of low activity initiation temperature, very high methanation activity and selectivity, cheapness and easiness in obtaining. The preparation method has the advantages of simple process, simplicity in operation and low production cost.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a composite component methanation catalyst and a preparation method thereof. Background technique [0002] China is the world's largest energy consumer, and the biggest feature of my country's energy resources is "rich in coal, poor in oil, and low in gas." The production of clean energy natural gas, which is in short supply in my country, with coke oven gas and coal as raw materials has a great market prospect. [0003] Methanation catalysts are at the heart of synthetic natural gas technology. CO and CO 2 The methanation of CO and CO in the presence of a methanation catalyst 2 Hydrogenation produces methane, and the main reactions that occur in the methanation process are: [0004] CO+3H 2 →CH 4 +H 2 O △H=-2.06×10 5 J (1) [0005] CO 2 +4H 2 →CH 4 +2H 2 O △H=-1.65×10 5 J (2) [0006] It can be seen that the methanation reaction is a strong e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89
CPCB01J23/002B01J23/894B01J23/8946B01J2523/00B01J2523/22B01J2523/31B01J2523/3706B01J2523/47B01J2523/821B01J2523/847
Inventor 陈俊生郭雄梁立谭建冬胡方
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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