A kind of preparation method for the high-temperature methanation catalyst that is used for CO and CO2 and hydrogen reaction to produce methane

A methanation catalyst and methane production technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of large water consumption, air pollution, magnesium Alumina spinel has problems such as high energy consumption, so as to reduce energy consumption and cost, ensure high temperature stability, and ensure low temperature and high activity.

Active Publication Date: 2015-12-02
昌邑凯特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the raw materials such as aluminum nitrate and magnesium nitrate used in the existing catalysts will cause nitrogen oxides to pollute the atmospheric environment during the roasting process. If the precipitation process is used, a large amount of water will be consumed and a large amount of sewage will be generated; the preparation process of the existing catalysts is more than 1000 Calcining at ℃ to produce magnesium aluminum spinel consumes a lot of energy, and the prepared magnesium aluminum spinel has small pore volume and specific surface area, and low catalyst activity

Method used

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  • A kind of preparation method for the high-temperature methanation catalyst that is used for CO and CO2 and hydrogen reaction to produce methane
  • A kind of preparation method for the high-temperature methanation catalyst that is used for CO and CO2 and hydrogen reaction to produce methane
  • A kind of preparation method for the high-temperature methanation catalyst that is used for CO and CO2 and hydrogen reaction to produce methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A. Weigh Al 2 o 3 63%Al 2 o 3 -nH 2 O1800g, light MgO445g, mix the two evenly; add 100ml of aqueous solution containing 10.63g of lanthanum nitrate; add 33.7g of peptizer citric acid and 1000ml of water, knead evenly, then dry at 120°C for 3~5h, and roast at 580°C for 2~3h, Cool down to room temperature and pulverize to 180 mesh or more to obtain mixed material III;

[0044] B. At room temperature, weigh 1000g of nickel nitrate, dissolve it in 1000ml of water, add it to the mixture III in step A and mix evenly; then dry at 120°C for 3-5h, roast at 580°C for 2-3h, cool down to room temperature and pulverize To 180 mesh or more to obtain dry powder material IV;

[0045] In the dry powder material IV, add 3% of Tianqing powder (based on the mass of the dry powder material), 3% of the peptizer citric acid (based on the mass of the dry powder material), and 900g of water, knead evenly, and then carry out molding, Dry at 120°C for 3 hours, and bake at 720°C for 3 hours ...

Embodiment 2

[0049] A. Weigh Al 2 o 3 63%Al 2 o 3 -nH 2 O1805g, light MgO446g, mix the two evenly; add peptizer citric acid 33.7g and 1000ml water and knead evenly, then dry at 120°C for 3-5h, roast at 580°C for 2-3h, cool to room temperature and pulverize to above 180 mesh to obtain Mixture III;

[0050] B. At room temperature, weigh 1000g of nickel nitrate, dissolve it in 1000ml of water, add it to the mixture III in step A and mix evenly; then dry at 120°C for 3-5h, roast at 580°C for 2-3h, cool down to room temperature and pulverize To 180 mesh or more to obtain dry powder material IV;

[0051] In the dry powder material IV, add 3% of Tianqing powder (based on the mass of the dry powder material), 3% of the peptizer citric acid (based on the mass of the dry powder material), and 900g of water, knead evenly, and then carry out molding, Dry at 120°C for 3 hours, and bake at 720°C for 3 hours to obtain dry powder material Ⅴ. Cool down to room temperature to measure its water absorp...

Embodiment 3

[0055] The preparation process, proportion and composition content are the same as in Example 1, and the ratio of kneading Ni and impregnating Ni is adjusted to 4:1 to prepare catalyst A3.

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Abstract

The invention discloses a preparation method of a high-temperature methanation catalyst applicable to preparation of methane by reacting CO and CO2 with hydrogen. A carrier of the catalyst is an MgO-Al2O3 spinel carrier or a multi-element inorganic oxide compound carrier which consists of MgO-Al2O3 spinel and TiO2; an active ingredient of the catalyst is Ni which exists in the catalyst in a form of nickel oxide; an auxiliary ingredient of the catalyst is La2O3 and / or CeO2; the active ingredient in the catalyst is added in two steps through a kneading method and a dipping method. The preparation method has the beneficial effects that one part of Ni is firstly added through the kneading method, so that the high-temperature stability of the catalyst can be guaranteed; the other part of Ni is loaded through the dipping method, so that the low-temperature high activity of the catalyst can be guaranteed; the catalyst is burned at the temperature of 480-600 DEG C to generate magnesia-alumina spinel, so that the energy consumption and the cost are reduced.

Description

technical field [0001] The invention relates to a preparation method of a methanation catalyst, in particular to a method for CO and CO 2 A method for preparing a wide-temperature methanation catalyst for producing methane by reacting with hydrogen. Background technique [0002] China's basic energy structure is characterized by "rich coal, poor oil and little gas". Coal accounts for 87.4% of the total energy resources reserves, proven coal reserves account for 33.8% of the world's coal reserves, and the recoverable reserves rank third in the world. The total amount of oil resources is about 1072.7×10 8 t, among which, onshore oil resources are about 826.7×10 8 t, remaining recoverable reserves 25.0×10 8 t, accounting for 1.7% of the world; the preliminary estimate of natural gas resources is 56×10 12 m 3 , recoverable resources 22×10 12 m 3 , equivalent to only 1% of the world's total reserves. [0003] Coal is the most important energy consumption in China, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J23/755
Inventor 张新堂李振兴
Owner 昌邑凯特新材料有限公司
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