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Preparation method of cobalt-manganese compound oxide for controlling multiple types of VOCs (volatile organic compounds) and product and application thereof

A composite oxide, cobalt-manganese technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, separation methods, etc. The method is simple and controllable, and the effect is simple to prepare

Inactive Publication Date: 2018-12-21
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that multiple VOCs coexist and are difficult to treat at the same time, the purpose of the present invention is to provide a method for preparing cobalt-manganese composite oxides for multiple VOCs treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for cobalt-manganese composite oxides for multiple VOCs treatment:

[0029] The first step: take 5.821 g cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) and 3.561 g of manganese nitrate aqueous solution with a mass fraction of 50% were dissolved in 300 mL of ethanol solution and stirred until dissolved to obtain a metal precursor solution;

[0030] The second step: weigh 4.159 g dihydrate oxalic acid (H 2 C 2 O4·2H 2 O) Disperse in 110 mL of ethanol, stir until dissolved to obtain an oxalic acid solution;

[0031] Step 3: Weigh 0.304 g of glycerin and dissolve it in 11 mL of ethanol to obtain a glycerin solution;

[0032] Step 4: Add the oxalic acid solution and the glycerin solution to the metal precursor solution dropwise at the same time, and control the dropping rate of the oxalic acid solution to 0.8 mL / s, and the dropping rate of the glycerin solution to 0.08 mL / s;

[0033] The fifth step, after the dropwise addition is complete, conti...

Embodiment 2

[0037] Weigh 7.276 cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) and 3.561 g of manganese nitrate aqueous solution with a mass fraction of 50% were dissolved in 350 mL of ethanol solution and stirred until dissolved to obtain a metal precursor solution; 4.852 g of oxalic acid dihydrate (H 2 C 2 O4·2H 2 O) Disperse in 128 mL of ethanol, stir until dissolved to obtain an oxalic acid solution; weigh 0.354 g of glycerin and dissolve it in 13 mL of ethanol solution to obtain a glycerin solution; The dropping rate of the oxalic acid solution was 0.8 mL / s, and that of the glycerol solution was 0.08 mL / s. After the dropwise addition was complete, continue to stir for 6 h, then suction filter to obtain a filter cake, place the filter cake in a blast drying oven to dry, and control the concentration of the drying oven to 60 o C, until completely dry; the dried sample is ground and sieved, placed in a muffle furnace for roasting, and the roasting temperature is 350 o Catalyst-2 ...

Embodiment 3

[0040] Weigh 4.366 g cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) and 1.780 g of manganese nitrate aqueous solution with a mass fraction of 50% were dissolved in 250 mL of ethanol solution and stirred until dissolved to obtain a metal precursor solution; 2.773 g of oxalic acid dihydrate (H 2 C 2O4·2H 2 O) Disperse in 73 mL of ethanol, stir until dissolved to obtain an oxalic acid solution; weigh 0.203 g of glycerol and dissolve it in 7 mL of ethanol solution to obtain a glycerol solution; add the oxalic acid solution and glycerin solution to the metal precursor solution drop by drop Control the dropping rate of oxalic acid solution to 0.8 mL / s, and the dropping rate of glycerol solution to 0.08 mL / s. After the dropwise addition was complete, continue to stir for 6 h, then suction filter to obtain a filter cake, place the filter cake in a blast drying oven to dry, and control the concentration of the drying oven to 60 o C, until completely dry; the dried sample is grou...

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Abstract

The invention discloses a preparation method of a cobalt-manganese compound oxide for controlling multiple types of VOCs (volatile organic compounds) and a product and application thereof. The preparation method has the advantages that an improved precipitation method is used for preparing; by leading a small amount of glycerin to regulate the particle size, metal valence and exposure active sitein the precipitation process, the catalyzing property of the material is greatly improved, and the good effects are realized in the controlling of the VOCs, such as alkanes, aromatic hydrocarbons, chlorinated aromatic hydrocarbons and chlorinated olefins; by leading the glycerin to regulate in the preparation process of the cobalt-manganese compound oxide, the particular property is realized in particle size, metal valence and exposure active site, and the excellent catalyzing property is realized in the catalytic oxidation process of the VOCs, such as alkanes, aromatic hydrocarbons, chlorinated aromatic hydrocarbons and chlorinated olefins; the components of the material are simple, the method is simple and controllable, the application range of the material is broad, the efficiency is high, and the like.

Description

technical field [0001] The invention relates to a preparation method of a cobalt-manganese composite oxide used for the treatment of various VOCs, its product and application, and belongs to the field of material preparation. Background technique [0002] Volatile organic compounds (VOCs) are the main source of air pollution, and they come from a wide variety of sources and are highly toxic. For example, formaldehyde and aromatic hydrocarbons have obvious "three causes" (carcinogenic, teratogenic, mutagenic) biological toxicity, some chlorinated hydrocarbons have significant toxic effects on human health, VOCs will produce ozone and peroxide after atmospheric photochemical reaction Some gaseous compounds with strong oxidizing properties, such as acetyl nitric acid, will endanger human health and damage plants. [0003] The treatment of VOCs has always been a common concern in the environmental field, and a variety of treatment methods have emerged, including absorption meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/72
CPCB01D53/8668B01D2257/708B01J23/8892
Inventor 何丹农袁静张晓岚刘喆蔡婷赵昆峰金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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