Technique for catalytic removal of ozone at room or low temperature

A catalytic material, manganese oxide technology, applied in the field of catalysis and environmental science, to achieve high processing efficiency, complete processing, and good stability

Inactive Publication Date: 2011-11-16
SHANGHAI NIUYI NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the moisture resistance and low temperature activity of manganese oxide need to be improved.

Method used

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  • Technique for catalytic removal of ozone at room or low temperature
  • Technique for catalytic removal of ozone at room or low temperature
  • Technique for catalytic removal of ozone at room or low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Iron-doped manganese oxide molecular sieve powders were synthesized by potassium permanganate (KMnO 4 ) and potassium persulfate (K 2 S 2 o 8 ) in nitric acid solution to oxidize manganese sulfate (MnSO 4 ·H 2 O), while adding iron nitrate (Fe(NO 3 ) 2 ), so that the Fe / Mn molar ratio is 0-0.20, the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then roasted at 500°C for 6h to obtain iron-doped manganese oxide Molecular sieve powder, respectively marked as Fe-OMS-0, Fe-OMS-5, Fe-OMS-10 and Fe-OMS-20, where Fe-OMS means iron-doped manganese oxide molecular sieve, and the number means Fe / Mn total The molar ratio percentage.

[0022] XRD analysis and HRTEM analysis indicated that the material was Hollandite type manganese oxide.

[0023] The performance tests of the catalytic materials were carried out in a continuous flow fixed bed reactor. The powdered catalytic material is tableted ...

Embodiment 2

[0025] The synthesis of the iron-doped manganese oxide molecular sieve powder is the same as in Example one, namely by potassium permanganate (KMnO 4 ) and potassium persulfate (K 2 S 2 o 8 ) in nitric acid solution to oxidize manganese sulfate (MnSO 4 ·H 2 O), while adding iron nitrate (Fe(NO 3 ) 2 ), so that the Fe / Mn molar ratio is 0 to 0.20, and the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then roasted at 200-800°C for 6h to obtain iron-doped Manganese oxide molecular sieve powder, respectively recorded as Fe-OMS-0, Fe-OMS-5, Fe-OMS-10 and Fe-OMS-20, where Fe-OMS means iron-doped manganese oxide molecular sieve, and the number means Fe / Mn total The molar ratio percentage.

[0026] XRD analysis and HRTEM analysis indicated that the material was Hollandite type manganese oxide.

[0027] The performance tests of the catalytic materials were carried out in a continuous flow fixed bed ...

Embodiment 3

[0029] 1) Synthesis of doped manganese oxide molecular sieve powder

[0030] The synthesis of the manganese oxide molecular sieve powder of doping is the same as example one, that is, the synthesis of the iron-doped manganese oxide molecular sieve powder is through potassium permanganate (KMnO 4 ) and potassium persulfate (K 2 S 2 o 8 ) in nitric acid solution to oxidize manganese sulfate (MnSO 4 ·H 2 O), while adding iron nitrate (Fe(NO 3 ) 2 ), so that the Fe / Mn molar ratio is 0-0.20, the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then roasted at 500°C for 6h to obtain iron-doped manganese oxide Molecular sieve powder.

[0031] 2) Preparation of doped manganese oxide molecular sieve honeycomb ceramic monolithic catalytic material.

[0032] Weigh a certain amount of doped manganese oxide molecular sieve, add a certain proportion of deionized water and the inorganic binder in claim 9, a...

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Abstract

The invention discloses a manganese-oxide-molecular-sieve-doped monolithic catalyst for catalytic removal of ozone at room or low temperature and a preparation method thereof and relates to the fields of catalyst and environment protection. The catalyst is characterized in that: a monolithic ceramic honey comb is used as a carrier; and manganese oxide molecular sieve containing doping iron is used as an active component. The iron-doped manganese oxide molecular sieve is characterized by a Hollandite type manganese oxide octagonal molecular sieve (OMS) structure, and the pore size is about 4.6*4.6 square angstroms; and iron ions are introduced into the OMS to form iron-doped manganese oxide molecular sieve. The ozone removal catalyst is prepared by a redox-reflux process. The monolithic catalyst disclosed by the invention has the characteristic that ozone is stably reduced into oxygen under normal temperature, normal humidity and high wind volume conditions without inputting extra light, heat, electricity and other energy resources.

Description

technical field [0001] The invention relates to a doped manganese oxide molecular sieve monolithic catalyst capable of decomposing ozone at room temperature and a preparation method thereof, and relates to the fields of catalysis and environmental science. It is characterized in that honeycomb ceramic or porous metal foam is used as carrier, and iron-doped Hollandite type manganese oxide molecular sieve is used as active component. The monolithic catalyst of the present invention is characterized in that it does not require additional energy input such as light, heat, and electricity, and can stably decompose ozone into oxygen under the conditions of normal temperature, humidity and large air volume. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst to remove ozone at room temperature or low temperature. Background technique [0...

Claims

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Application Information

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IPC IPC(8): B01J29/00B01D53/86B01D53/66
CPCY02A50/20
Inventor 不公告发明人
Owner SHANGHAI NIUYI NEW ENERGY TECH
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