Preparation method of composite metal oxide loaded catalyst and application of catalyst to field of waste gas treatment

A composite metal and oxide technology, applied in the field of industrial waste gas treatment and waste gas treatment, can solve few problems, and achieve the effects of avoiding secondary pollution, clean and environmentally friendly process methods, and simple and easy preparation methods.

Inactive Publication Date: 2018-04-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported in the literature that at room temperature, when the molar ratio of ozone to NO reaches 1, the conversion rate of NO can reach 90-95%, but there are few reports on low-temperature catalytic ozonation of NO.

Method used

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  • Preparation method of composite metal oxide loaded catalyst and application of catalyst to field of waste gas treatment
  • Preparation method of composite metal oxide loaded catalyst and application of catalyst to field of waste gas treatment
  • Preparation method of composite metal oxide loaded catalyst and application of catalyst to field of waste gas treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: MnO x -Al 2 o 3 Catalyst Preparation and Application of Catalytic Ozone Oxidation Performance

[0041] Select γ-Al of 1~2mm 2 o 3 The small ball is used as the catalyst carrier, washed twice with deionized water, then soaked overnight with 0.10mol / L dilute hydrochloric acid, finally washed with deionized water until the effluent is neutral, and dried at 100±2°C to obtain the activation treated γ-Al 2 o 3 pellets; activated γ-Al 2 o 3 The pellets use an appropriate amount of 50% Mn(NO 3 ) 2 The solution was impregnated with an equal volume, ultrasonicated for 2 hours, dried in an oven at 105°C for 2.5 hours, and then roasted at 500°C for 4 hours to obtain MnO x -Al 2 o 3 catalyst.

[0042] 10g of prepared MnO x -Al 2 o 3The catalyst is loaded into the reaction device, and the simulated flue gas containing 500ppmNO is passed through. The flue gas flow rate is set at 1L / min, the relative humidity of the flue gas is 10%, the reaction temperature i...

Embodiment 2

[0043] Example 2: CuO x -Al 2 o 3 Catalyst Preparation and Application of Catalytic Ozone Oxidation Performance

[0044] Select γ-Al of 1~2mm 2 o 3 The small ball is used as the catalyst carrier, washed twice with deionized water, then soaked overnight with 0.10mol / L dilute hydrochloric acid, finally washed with deionized water until the effluent is neutral, and dried at 100±2°C to obtain the activation treated γ-Al 2 o 3 pellets; activated γ-Al 2 o 3 The pellets were filled with an appropriate amount of Cu(NO 3 ) 2 The solution was impregnated with an equal volume, ultrasonicated for 2 hours, dried in an oven at 105°C for 2.5 hours, and then roasted at 500°C for 4 hours to obtain CuO x -Al 2 o 3 catalyst.

[0045] 10g of prepared CuO x -Al 2 o 3 The catalyst is loaded into the reaction device, and the simulated flue gas containing 500ppmNO is passed through. The flue gas flow rate is set at 1L / min, the relative humidity of the flue gas is 10%, the reaction tem...

Embodiment 3

[0046] Example 3: MnO x -CeO x -Al 2 o 3 Catalyst Preparation and Application of Catalytic Ozone Oxidation Performance

[0047] Select γ-Al of 1~2mm 2 o 3 The small ball is used as the catalyst carrier, washed twice with deionized water, then soaked overnight with 0.10mol / L dilute hydrochloric acid, finally washed with deionized water until the effluent is neutral, and dried at 100±2°C to obtain the activation treated γ-Al 2 o 3 pellets; activated γ-Al 2 o 3 The pellets were filled with an appropriate amount of Mn(NO 3 ) 2 and Ce(NO 3 ) 2 The mixed solution is impregnated with equal volume, ultrasonicated for 2 hours, dried in an oven at 105°C for 2.5 hours, and then roasted at 500°C for 4 hours to obtain MnO x -CeO x -Al 2 o 3 catalyst.

[0048] 10g of prepared MnO x -CeO x -Al 2 o 3 The catalyst is loaded into the reaction device, and the simulated flue gas containing 500ppmNO is passed through. The flue gas flow rate is set at 1L / min, the relative humid...

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Abstract

The invention discloses a preparation method of a composite metal oxide loaded catalyst and an application of the catalyst to the field of waste gas treatment, and belongs to the technical field of industrial waste gas. The preparation method includes the steps: performing equivalent-volume impregnation on activated carriers in composite metal nitrate impregnation solution containing manganese, cobalt, cerium, iron, copper and nickel; performing ultrasound, drying and roasting on the impregnated carriers to obtain the catalyst loaded the composite metal oxides. The preparation method is green,environmentally friendly, simple to operate and easily industrialized. NO in flue gas is transformed into NOx at low temperature by the aid of the catalyst prepared by the method, the molar ratio ofO3 to NO in 500ppm NO is 0.6, the relative humidity of the flue gas is 10%, reaction temperature is 100 DEG C or less, MnOx-CeOx-Al2O3 serves as a catalyst after reaction for 90 minutes, the transformation rate of the NO can be kept about 40%, MnOx-Al2O3 serves as a catalyst, and highest removal rate can reach 80%, so that ozone oxidation is effectively catalyzed.

Description

technical field [0001] The invention belongs to the technical field of industrial waste gas treatment, and in particular relates to a preparation method of a loaded composite metal oxide catalyst and its application in the field of waste gas treatment. Background technique [0002] During the combustion of fossil fuels, the fixed nitrogen contained in minerals is oxidized to NO x After discharge, it will cause great harm to human health and the ecological environment, including affecting the human respiratory system and cardiovascular system, forming acid rain and acid fog, and destroying the ozone layer. It can also react with other pollutants in the air to form PM2.5. NO x More than 90% of the NO in the flue gas exists in the form of NO which is hardly soluble in water, so the treatment of NO in the flue gas has become the focus of flue gas denitrification. [0003] At present, the most mature technology for flue gas denitrification is high-temperature ammonia selective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/72B01J23/889B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2251/104B01J23/002B01J23/34B01J23/72B01J23/8892B01J2523/00B01J2523/31B01J2523/3712B01J2523/72B01J2523/845
Inventor 杨凤林唐云刘冰
Owner DALIAN UNIV OF TECH
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