Method for preparing methanation catalyst by adopting urea combustion method

A methanation catalyst, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effects of short process, increased specific surface area, and environmental friendliness

Inactive Publication Date: 2014-01-29
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using the urea combustion method to prepare methanation catalysts, it is necessary to investigate the composition of the catalyst carrier, catalytic active components, additives, and its ratio to th

Method used

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  • Method for preparing methanation catalyst by adopting urea combustion method
  • Method for preparing methanation catalyst by adopting urea combustion method

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Experimental program
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Embodiment 1

[0023] The preparation method of the present embodiment comprises the following steps:

[0024] Step 1, take by weighing 340.3 grams of Al(NO 3 ) 3 9H 2 O, 14.6 g Ni(NO 3 ) 2 ·6H 2 O, 90.9 grams of urea, 27 grams of ethanol, put into a planetary ball mill and ball mill for 20 minutes, which is a fully mixed material for ball milling, wherein the ratio of the molar number of combustion agent urea to the sum of the molar numbers of aluminum nitrate and nickel nitrate is 3 :1.

[0025] Step 2. Transfer the material mixed uniformly by the ball mill to a crucible or a quartz boat, and directly put it into a muffle furnace with a preset temperature of 450°C for a combustion reaction, and keep it for 60 minutes, then cool naturally, which is the production process. 7.5%NiO / γ-Al 2 o 3 (NC) catalyst, (NC) means the catalyst prepared by the combustion method of aluminum source with aluminum nitrate as carrier.

[0026] The composition and activity evaluation results of the cata...

Embodiment 2

[0028] The preparation method of the present embodiment comprises the following steps:

[0029] Step 1, take by weighing 299.1 grams of Al(NO 3 ) 3 9H 2 O, 36.4 g Ni(NO 3 ) 2 ·6H 2 O, 94.5 grams of urea, 52 grams of ethanol, put into a planetary ball mill and ball mill for 30 minutes, which is a fully mixed material for ball milling, wherein the ratio of the molar number of combustion agent urea to the sum of the molar numbers of aluminum nitrate and nickel nitrate is 3 :1.

[0030] Step 2. Transfer the material mixed uniformly by the ball mill to a crucible or a quartz boat, and directly put it into a muffle furnace with a preset temperature of 600°C for a combustion reaction, and keep it for 30 minutes, and then cool it naturally. 18.7%NiO / γ-Al 2 o 3 (NC) catalyst, (NC) means the catalyst prepared by the combustion method of aluminum source with aluminum nitrate as carrier.

[0031] The composition and activity evaluation results of the catalysts are shown in Table ...

Embodiment 3

[0033] The preparation method of the present embodiment comprises the following steps:

[0034] Step 1, take by weighing 203.1 grams of Al(NO 3 ) 3 9H 2 O, 87.2 g Ni(NO 3 ) 2 ·6H 2 O, 102.6 grams of urea, 74 grams of ethanol, put into a planetary ball mill and ball mill for 40 minutes, which is a fully mixed material for ball milling, wherein the ratio of the molar number of combustion agent urea to the sum of the molar numbers of aluminum nitrate and nickel nitrate is 3 :1.

[0035] Step 2. Transfer the material mixed uniformly by the ball mill to a crucible or a quartz boat, and directly put it into a muffle furnace with a preset temperature of 550°C for a combustion reaction, and keep it for 50 minutes, and then cool it naturally. 44.8%NiO / γ-Al 2 o 3 (NC) catalyst, (NC) means the catalyst prepared by the combustion method of aluminum source with aluminum nitrate as carrier.

[0036] The composition and activity evaluation results of the catalysts are shown in Table...

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Abstract

The invention relates to a method for preparing a methanation catalyst by adopting a urea combustion method. The method for preparing the methanation catalyst comprises the following steps: firstly mixing a catalyst active component precursor, an auxiliary M precursor and a catalyst carrier precursor; simultaneously adding a combustion agent and a dispersing agent, carrying out ball grinding for 20-60 minutes by adopting a planet ball grinding mill, and uniformly mixing; then transferring the material which is fully ball-ground and uniformly mixed into a crucible or quartz boat, directly placing the crucible or quartz boat into a constant-temperature muffle furnace at a preset temperature of 300-600 DEG C, and carrying out a combustion reaction for 30-60 minutes, thus obtaining the methanation catalyst. According to the method for preparing the methanation catalyst, aluminium nitrate or pseudo-boehmite is taken as a carrier raw material, nickel nitrate is taken as a main active component raw material, nitrates of other metals are taken as auxiliary raw materials, ethyl alcohol is taken as the dispersing agent, urea is taken as the combustion agent, and the method for preparing the methanation catalyst has the biggest advantages of simple operation process, short preparation time and no waste water discharge, and is especially applicable to industrial mass production.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation and application, in particular to a method for preparing a methanation catalyst by a urea combustion method. Background technique [0002] my country's energy structure is "more coal, less oil, and gas", with insufficient oil and gas resources, but relatively rich coal resources. During the combustion of coal, a large amount of sulfur oxides, nitrogen oxides and a large amount of dust are emitted, which will cause weather pollution such as acid rain and photochemical smog. Dust, especially PM2.5, will cause human respiratory diseases. Compared with coal-to-methanol, coal-to-dimethyl ether, coal direct liquefaction, coal indirect liquefaction and other technologies, coal-to-synthetic natural gas (SNG) has high overall heat utilization efficiency (over 50%), low investment cost per unit calorific value, CO It has the advantages of high conversion rate (close to 100%), high utilization ...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/83C07C9/04C07C1/04
Inventor 肖天存季生福许世森徐越王晓龙程金燮李亚强蒋赛赵志国张健
Owner HUANENG CLEAN ENERGY RES INST
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