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Preparation and application of a manganese oxide-supported molecular sieve catalyst

A technology of manganese oxide and molecular sieve, which is applied in the field of catalysis, can solve problems such as the influence of molecular sieve surface properties, unfavorable pore wall modification and treatment, etc., and achieve the effects of convenient and fast energy, high catalytic activity and stability, and good catalytic activity

Active Publication Date: 2022-07-22
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This requires a long time of calcination to remove the template. Although the calcination method can remove the template agent, it will inevitably cause shrinkage of the pores, and the calcination method will have a certain impact on the surface properties of the molecular sieve after removing the template, which is not conducive to the formation of pores. Walls are trimmed and treated

Method used

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  • Preparation and application of a manganese oxide-supported molecular sieve catalyst
  • Preparation and application of a manganese oxide-supported molecular sieve catalyst

Examples

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Effect test

Embodiment 1

[0030] In this example, using triblock copolymer P123 as template agent and ethyl orthosilicate (TEOS) as silicon source, pure silicon SBA-15 mesoporous molecular sieve was synthesized under acidic conditions.

[0031] The specific synthesis steps are as follows: weigh 2g of P123, mix with 60ml of 2mol / L hydrochloric acid and 15ml of distilled water, stir in a 40°C water bath for 2h to dissolve it, then add 4.17ml of ethyl orthosilicate, continue to stir for 24h, add In a stainless steel reactor with a polytetrafluoroethylene lining, stand for 24 hours in an oven at 100 ° C, take out and cool, wash with distilled water and suction filtration, and dry to obtain SBA-15 carrier without removing template P123 .

[0032] Weigh 3.5g of potassium permanganate and 1.2g of sba-15 carrier without removing template P123 and dissolve it in 60ml of 1mol / L nitric acid solution, stir magnetically for 1h to make the mixture uniform, and then transfer the uniformly mixed solution to a polytetr...

Embodiment 2

[0034] Weigh 3.5g of potassium permanganate and 0.8g of sba-15 carrier without removing template P123 and dissolve it in 60ml of 1mol / L nitric acid solution, stir magnetically for 1h to make the mixing uniform, and then transfer the mixed uniform solution to a polytetrafluoroethylene In a stainless steel reactor lined with ethylene, the reactor was placed in an oven at 100 °C for 12 h. The obtained solution was suction filtered and washed with deionized water for several times to remove impurities, then placed in an oven for drying at 100 °C for 12 hours, and finally calcined at 400 °C for 2 hours to obtain the prepared supported catalyst.

Embodiment 3

[0036] Weigh 3.5g of potassium permanganate and 1.2g of sba-15 carrier without removing template P123 and dissolve it in 60ml of 1mol / L nitric acid solution, stir magnetically for 1h to make the mixing uniform, and then transfer the mixed uniform solution to a polytetrafluoroethylene The ethylene-lined stainless steel reaction kettle was placed in an oven at 100 °C for 12 h. The obtained solution was suction filtered and washed with deionized water for several times to remove impurities, then dried in an oven at 100 °C for 12 hours, and finally calcined at 550 °C for 4 hours to obtain the prepared supported catalyst.

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Abstract

The invention discloses a preparation method and application of a manganese oxide-supported molecular sieve catalyst. In the method of the invention, while the manganese-containing oxide is loaded on the molecular sieve, the strong oxidizing property of potassium permanganate can simultaneously remove the template agent used in the preparation process of the molecular sieve. wherein the supported manganese oxide includes MnO 2 , Mn 2 O 3 , Mn 3 O 4 and other mixed metal oxides containing manganese. The supported manganese-containing catalyst prepared by the invention can be widely used in the field of environmental catalysis to save energy and reduce costs, and at the same time improve the efficiency of the catalyst. It has a good application prospect and is worthy of vigorous promotion and application.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to the preparation and application of a supported catalyst. Background technique [0002] The pollution of volatile organic pollutants in the atmosphere seriously threatens people's health, so the catalytic removal of volatile organic pollutants has been widely discussed and studied. The key to catalytic removal of volatile organic pollutants is to find catalysts with high catalytic activity. [0003] Among them, manganese element is a kind of metal element with good redox properties. It has been found that manganese oxides have good catalytic activity for volatile organic pollutants. [0004] Molecular sieves have large specific surface area, uniform and narrow pore size distribution, high hydrothermal stability, and have broad application prospects in the fields of catalysis, adsorption, and separation. However, molecular sieves are generally inactive for volatile organic pollutants. Fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J29/78B01D53/86B01D53/44
CPCB01J29/0341B01J29/78B01D53/8687B01J2229/18B01D2257/708
Inventor 刘庆岭郑善滨刘彩霞张子印
Owner TIANJIN UNIV
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