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Catalyst use for dimethyl ether catalytic combustion and its preparation method and application

A catalytic combustion and catalyst technology, applied in fuel, gas fuel, petroleum industry, etc., can solve problems such as carbon deposition, deactivation, and high price, and achieve the effects of reducing combustion temperature, reducing emissions, and improving utilization efficiency

Inactive Publication Date: 2008-08-13
广州市威格林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precious metals are the active components of common deep oxidation catalysts, but they are expensive, and there are various degrees of sintering and carbon deposition under high temperature reaction conditions, which lead to deactivation and other shortcomings.

Method used

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  • Catalyst use for dimethyl ether catalytic combustion and its preparation method and application
  • Catalyst use for dimethyl ether catalytic combustion and its preparation method and application
  • Catalyst use for dimethyl ether catalytic combustion and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Under reflux in a water bath at 96°C, potassium permanganate and manganese sulfate were mixed into a uniform solution according to a molar ratio of 0.76, and concentrated nitric acid was added to adjust the pH value to less than 1, stirred vigorously for 24 hours, then filtered, and washed with deionized water and ethanol repeatedly , dried at 60°C for 12h, and then ground to obtain MnO 2 , weigh Fe(NO 3 ) 3 , and dissolved in a certain amount of methanol to make a 0.4mol / L solution, the MnO 2 with Fe(NO 3 ) 3 The methanol solution was mixed, stirred by magnetic force for 24 hours, then dried at 60°C for more than 12 hours, and then fired at 450°C at a rate of 2°C / min for 2 hours to obtain a doped Fe-OMS-2 material. The obtained catalyst is pressed into tablets and then crushed and sieved to 40-60 meshes for use.

[0023] The catalytic combustion reaction of dimethyl ether was carried out in a continuous flow fixed bed reactor. Quartz reaction tube with an inner d...

Embodiment 2

[0025] Under reflux in a water bath at 96°C, potassium permanganate and manganese sulfate were mixed into a uniform solution according to a molar ratio of 0.76, and concentrated nitric acid was added to adjust the pH value to less than 1, stirred vigorously for 24 hours, then filtered, and washed with deionized water and ethanol repeatedly , dried at 60°C for 12h, and then ground to obtain MnO 2 , weigh Co(NO 3 ) 2 , and dissolved in a certain amount of methanol to make a 0.4mol / L solution, the MnO 2 and Co(NO 3 ) 2 The methanol solution was mixed, stirred by magnetic force for 24h, then dried at 60°C for more than 12h, and then fired at 450°C at a rate of 4°C / min for 2h to obtain a doped Co-OMS-2 material. The obtained catalyst is pressed into tablets and then crushed and sieved to 40-60 meshes for use.

[0026] The catalytic combustion reaction of dimethyl ether was carried out in a continuous flow fixed bed reactor. Quartz reaction tube with an inner diameter of 8 mm,...

Embodiment 3

[0028] Under reflux in a water bath at 96°C, potassium permanganate and manganese sulfate were mixed into a uniform solution with a molar ratio of 1, and concentrated nitric acid was added to adjust the pH value to less than 1, stirred vigorously for 12 hours, then filtered, and washed with deionized water and ethanol repeatedly , dried at 60°C for 12h, and then ground to obtain MnO 2 , weigh Ni(NO 3 ) 2 , and dissolved in a certain amount of methanol to make a 0.4mol / L solution, the MnO 2 with Ni(NO 3 ) 2 The methanol solution was mixed, stirred by magnetic force for 24h, then dried at 60°C for more than 12h, and then fired at 350°C at a rate of 4°C / min for 6h to obtain a doped Ni-OMS-2 material. The obtained catalyst is pressed into tablets and then crushed and sieved to 40-60 meshes for use.

[0029] The catalytic combustion reaction of dimethyl ether was carried out in a continuous flow fixed bed reactor. A quartz reaction tube with an inner diameter of 8mm, a cataly...

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Abstract

The invention discloses a catalyst for dimethyl ether catalytic combustion and the preparation method and the application. The catalyst is that: firstly, manganese oxide octahedron molecular sieve can be prepared by an oxidation-reduction method, then a third metal component Fe, Ni, Cu, Ce or Cr are loaded. The catalyst of the invention is suitable for the dimethyl ether catalytic combustion, when the volume ratio of air or air mixture and dimethyl ether is 50, the dimethyl ether is entirely catalyzed to combust at the temperature ranging from 150 to 375 DEG C; the invention provides a cheap, efficient and clean catalyst for the catalytic combustion of the clean energy dimethyl ether, can reduce combustion temperature, decrease pollutant discharge and improve the using efficiency of energy.

Description

technical field [0001] The invention relates to a catalyst for catalytic combustion of dimethyl ether, a preparation method thereof and an application in catalytic combustion of dimethyl ether. Background technique [0002] my country is short of oil resources, but rich in natural gas and coal resources. From the perspective of environmental protection and safe use of energy, there is an urgent need for clean energy forms. Under this background, the clean fuel dimethyl ether (DME) synthesized on the basis of natural gas or coal has become one of the research hotspots in the field of energy chemical industry and catalysis. . In 2007, the Ministry of Construction issued an announcement on the industry product standard "Dimethyl Ether for Urban Gas", and approved "Dimethyl Ether for Urban Gas" as the product standard for urban construction industry. At the same time, under the suggestion of the National Standards Committee, the national standard for dimethyl ether will also b...

Claims

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Application Information

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IPC IPC(8): C10L3/12
Inventor 余林孙明余倩余坚郝志峰李朝圣
Owner 广州市威格林环保科技有限公司
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