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Nickel-aluminum catalyst and its preparation method and application in carbon monoxide methanation

A carbon monoxide and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrocarbon production from carbon oxides, etc., can solve problems such as sintering deactivation, achieve anti-sintering sintering growth, and improve high-temperature thermal stability Effect

Active Publication Date: 2017-03-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a nickel-aluminum catalyst and its preparation method and application in carbon monoxide methanation, solve the technical problem of reaction sintering deactivation of the existing nickel-based methanation catalyst at high temperature, and can simultaneously overcome The problem of sintering deactivation of nickel-based methanation catalyst at high temperature, thereby improving the stability of the catalyst

Method used

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  • Nickel-aluminum catalyst and its preparation method and application in carbon monoxide methanation
  • Nickel-aluminum catalyst and its preparation method and application in carbon monoxide methanation
  • Nickel-aluminum catalyst and its preparation method and application in carbon monoxide methanation

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Experimental program
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Effect test

preparation Embodiment 1

[0038] Step 1, 2g polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 0.255gNi(NO 3 ) 2 ·6H 2 O is placed in 10ml of ethanol, stirred to make it dissolve or disperse evenly;

[0039] Step 2, put 1.86g of aluminum isopropoxide and 1.6ml of 67% nitric acid aqueous solution in 10ml of ethanol, and stir to dissolve or disperse them evenly;

[0040] Step 3: Mix the two systems prepared in Step 1 and Step 2, and stir to make them uniformly dispersed, then dry to obtain a green solid, and dry at 50°C for 48 hours;

[0041] Step 4: Roast the green solid obtained in step 3 in the air as follows: rise from room temperature 25°C to 150°C for 2 hours, then bake at 210°C for 4 hours, then heat up to 320°C for 2 hours, and finally bake at 700°C 4h. During the heating process, the heating rate is kept at 2°C / min. After the calcination is completed, it can be cooled naturally at room temperature.

preparation Embodiment 2

[0043] Step 1, 2g polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 0.25gNi(NO 3 ) 2 ·6H 2 O is placed in 10ml of ethanol, stirred to make it dissolve or disperse evenly;

[0044] Step 2, put 1.85g of aluminum isopropoxide and 1.5ml of 67% nitric acid aqueous solution in 10ml of ethanol, and stir to dissolve or disperse them evenly;

[0045] Step 3: Mix the two systems prepared in Step 1 and Step 2, and stir to make them uniformly dispersed, then dry to obtain a green solid, and dry at 60°C for 24 hours;

[0046] Step 4, the green solid obtained in step 3 is roasted in the air as follows: from room temperature 20°C to 150°C for 2 hours, then at 210°C for 4 hours, then at 320°C for 2 hours, and finally at 700°C 4h. During the heating process, the heating rate is kept at 2°C / min. After the calcination is completed, it can be cooled naturally at room temperature.

preparation Embodiment 3

[0048] Step 1, 2g polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 0.26gNi(NO 3 ) 2 ·6H 2 O is placed in 10ml of ethanol, stirred to make it dissolve or disperse evenly;

[0049] Step 2, put 1.855g of aluminum isopropoxide and 1.55ml of 67% nitric acid aqueous solution in 10ml of ethanol, and stir to make them dissolve or disperse evenly;

[0050] Step 3: Mix the two systems prepared in Step 1 and Step 2, and stir to disperse them uniformly, then dry to obtain a green solid, and dry at 55°C for 30 hours;

[0051] Step 4: Roast the green solid obtained in step 3 in the air as follows: rise from room temperature 25°C to 150°C for 2 hours, then bake at 210°C for 4 hours, then heat up to 320°C for 2 hours, and finally bake at 700°C 4h. During the heating process, the heating rate is kept at 2°C / min. After the calcination is completed, it can be cooled naturally at room temperature.

[0052] Utilize following test to carry out property test to th...

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Abstract

The invention discloses a nickel-aluminum catalyst as well as a preparation method and application thereof to carbon monoxide methanation. Salts of nickel and aluminum are used as raw materials and are dissolved and dispersed into ethanol to generate a liquid-phase reaction; then a roasting method to obtain the catalyst with an ordered mesoporous structure, mixed gas of hydrogen and nitrogen is introduced for reducing when the catalyst is used; and finally, the temperature is adjusted to a reaction temperature under the protection of the nitrogen and reaction gas including carbon monoxide and hydrogen is introduced into a reactor to carry out a carbon monoxide methanation reaction. According to the catalyst, the disadvantages of sintering and carbon deposition of a traditional nickel-based catalyst can be overcome; the nickel-aluminum catalyst has better catalytic activity and stability; and in a catalytic activity test, the conversion rate of CO at 450 DEG C can be up to 93% and the yield of CH4 is 72%.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and more specifically relates to a nickel-aluminum catalyst, a preparation method thereof and an application in carbon monoxide methanation. Background technique [0002] At present, with the rapid development of the global economy, the demand and consumption of energy for human beings has shown unprecedented rapid growth, and the emission of greenhouse gases and various toxic and harmful gases has also surged accordingly, and the living environment of human beings has thus been greatly challenged. In this situation, natural gas energy has attracted more attention due to its cleanness and high calorific value, and is used by countries all over the world to improve the environment and promote sustainable economic development. my country's energy structure is "more coal, less oil and less gas". Therefore, it is of great significance to my country's energy strategy to study the process r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/10C07C1/04C07C9/04C10L3/08
Inventor 巩金龙田昊曾亮李水荣马洪艳
Owner TIANJIN UNIV
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