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Preparation method and application of porous manganese oxide/cerium oxide composite sulfur dioxide removing material

A technology for removing sulfur dioxide and manganese oxide, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of low performance, low capacity, small volume, etc., achieve regular and orderly pore structure, improve reaction rate, large Effect of contact area

Active Publication Date: 2019-12-10
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional metal oxide deSO 2 The material has deSO 2 Slow rate, deSO 2 Due to the disadvantages of low capacity, it cannot be effectively applied to SO 2 removal of
Generally, for SO in diesel engine exhaust 2 , the required deSO 2 The equipment is small in size, the space velocity of the exhaust gas is unstable, and the SO 2 Low concentration, large temperature changes, etc., under such exhaust gas conditions, conventional SO removal 2 Material removal of SO 2 Generally lower performance

Method used

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  • Preparation method and application of porous manganese oxide/cerium oxide composite sulfur dioxide removing material
  • Preparation method and application of porous manganese oxide/cerium oxide composite sulfur dioxide removing material
  • Preparation method and application of porous manganese oxide/cerium oxide composite sulfur dioxide removing material

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Embodiment 1

[0027] A porous manganese oxide / cerium oxide composite desulfurization material, denoted as Mn 0.85 Ce 0.15 o x , wherein 0.15 is the molar percentage of Ce in the sum of Mn and Ce, x refers to the number of oxygen atoms, and the scope is between 1.0-2.0, and its preparation method comprises the following steps:

[0028] 1) dissolving manganese nitrate and cerium nitrate in ethanol respectively, and preparing a solution in which the total concentration of Mn and Ce ions is 1mol / L, and the molar percentage of Ce in the sum of Mn and Ce is 0.15;

[0029] 2) Take KIT-6 molecular sieve, first pretreat it in a vacuum environment at 100°C for 8 hours to obtain the pretreated molecular sieve, then take 1g and put it into a 5ml beaker;

[0030] 3) Evenly drop 2ml of the solution obtained in step 1) into the pretreated 1g molecular sieve obtained in step 2), and then seal it with plastic wrap. After ultrasonic vibration for 30 minutes, vacuum impregnate at room temperature for 5 hour...

Embodiment 2

[0052] Referring to Example 1, the difference is that step 1) is to dissolve manganese nitrate and cerium nitrate in ethanol respectively, and prepare the total concentration of Mn and Ce ions as 1mol / L, the molar percentage of Ce in the sum of Mn and Ce A solution of 0.25.

Embodiment 3

[0054] Referring to Example 1, the difference is that step 1) is to dissolve manganese nitrate and cerium nitrate in ethanol respectively, and prepare the total concentration of Mn and Ce ions as 1mol / L, the molar percentage of Ce in the sum of Mn and Ce A solution of 0.05.

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Abstract

The invention discloses a preparation method of a porous manganese oxide / cerium oxide composite sulfur dioxide removing material. Manganese oxide is compounded with cerium oxide by adopting a templatemethod, a porous structure is formed, and then the manganese oxide / cerium oxide composite sulfur dioxide removing material with high activity component, large specific surface area and ordered porousstructure is obtained. Performance of the manganese oxide / cerium oxide composite sulfur dioxide removing material for removing sulfur dioxide in tail gas of diesel engines is improved.

Description

Technical field: [0001] The invention relates to the technical field of removing sulfur dioxide from diesel engine exhaust, in particular to a preparation method and application of a porous manganese oxide / cerium oxide composite material for sulfur dioxide removal. Background technique: [0002] Exhaust gas from diesel engines contains more harmful components, such as sulfur oxides (SO x ) and nitrogen oxides (NO x ), among them, sulfur dioxide (SO 2 ) is exactly a kind of very harmful gas in the diesel engine exhaust gas, and its emission into the atmosphere will endanger human health and cause environmental pollution. Therefore, SO in diesel engine exhaust 2 Must be effectively controlled and removed. [0003] Dry flue gas desulfurization technology is a commonly used in industry to control SO 2 method of emission. Metal oxides (such as CaO, MnO 2 、TiO 2 , CeO 2 etc.) is a commonly used dry SO removal 2 materials, it can not only effectively remove SO 2 , and ha...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/81B01D53/92
CPCB01D53/508B01D53/81B01D53/92B01D2251/602B01D2258/012
Inventor 李兴邓立生大坂侑吾曾涛黄宏宇何兆红李军
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI