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Metal ion doped manganese oxide catalyst, preparation method and use thereof

A technology of metal ions and catalysts, which is applied in the field of metal ion-doped manganese oxide catalysts, can solve problems such as differences in catalytic performance and structure, and achieve the best catalytic combustion performance

Inactive Publication Date: 2010-08-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts prepared by different methods, due to the difference in the preparation process, will lead to differences in their structures, resulting in differences in their catalytic performance

Method used

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  • Metal ion doped manganese oxide catalyst, preparation method and use thereof
  • Metal ion doped manganese oxide catalyst, preparation method and use thereof
  • Metal ion doped manganese oxide catalyst, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a 40°C water bath, Bir-type manganese oxide and Ce(NO 3 ) 3 According to the Ce / Mn molar ratio of 1%, mixed evenly, stirred vigorously, washed and filtered, and baked at 110°C for 12 hours to obtain a black solid powder. Ce-doped manganese oxide is obtained, and its crystal structure is mainly Bir-type manganese oxide. The obtained catalyst is crushed and sieved to 40-60 meshes after being pressed into tablets for use.

Embodiment 2

[0020] In a 60°C water bath, Bir-type manganese oxide and Ce(NO 3 ) 3 Mix evenly according to Ce / Mn molar ratio of 5%, stir vigorously, wash and filter, and bake at 110°C for 12 hours to obtain a black solid powder. The powder is roasted at 700°C for 20 hours at a rate of 4°C / min in an air atmosphere. Ce-doped manganese oxide was obtained. Its crystal structure is mainly Mn 2 o 3 . The obtained catalyst is crushed and sieved to 40-60 meshes after being pressed into tablets for use.

Embodiment 3

[0022] In a 60°C water bath, Bir-type manganese oxide and Ce(NO 3 ) 3 Mix evenly according to Ce / Mn molar ratio of 7%, stir vigorously, wash and filter, and bake at 110°C for 12 hours to obtain a black solid powder. The powder is roasted at a rate of 4°C / min to 500°C for 5 hours in an air atmosphere. Ce-doped manganese oxide was obtained. Its crystal structure is mainly Cry type manganese oxide. The obtained catalyst is crushed and sieved to 40-60 meshes after being pressed into tablets for use.

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PUM

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Abstract

The invention discloses a metal ion-doped manganese oxide catalyst, a preparation method and use thereof; the preparation method of the catalyst comprises the following steps: preparing a Birnessite type manganese oxide precursor of the catalyst using sol-gel process; introducing metal ions into the space between layers of manganese or the frame of manganese in a water bath at the temperature of 40-80 DEG C with immersion method; and roasting for 1-48h at the temperature of 110-480 DEG C in gas atmosphere so as to obtain a catalyst of variable structure. The catalyst shows a high low-temperature activity in catalytic combustion reaction of dimethyl ether, thus the catalyst can serve as a high-efficient catalyst for combustion of dimethyl ether.

Description

technical field [0001] The invention relates to a metal ion-doped manganese oxide catalyst for catalytic combustion of dimethyl ether, a preparation method and application thereof. Background technique [0002] Dimethyl ether (DME) has excellent physical properties. Under normal temperature and pressure, it is a colorless gas with an ether smell, low toxicity, and no carcinogenicity. It can be stored in a standard 0.6Mpa propane cylinder and is easy to transport. DME has a high cetane number (55-60, 27% higher than that of diesel), good power performance, and can realize smokeless combustion. It is an ideal alternative fuel for diesel engines and can also be used as liquefied gas ( LPG) substitutes for domestic fuel. From the perspective of environmental protection and safe use of energy, DME synthesized on the basis of natural gas or coal with relatively abundant resources has incomparable comprehensive advantages such as natural gas, methanol, propane, butane, diesel, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/34C10L10/00
Inventor 余林刁贵强孙明李永峰郝志峰余倩那秀辉周俊丽
Owner GUANGDONG UNIV OF TECH
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