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Catalyst for treating organic waste gas and preparation method thereof

A technology of organic waste gas and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of high price, scarce resources, poor resistance to toxicity, etc., and achieve low cost and active temperature window Wide, strong water vapor resistance effect

Inactive Publication Date: 2012-05-23
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the catalytic combustion catalysts used in my country all need to be imported, and the main suppliers are Engelhard, Johnson Matthey, Allied Signal and UOP four companies, and all use noble metals such as Pt, Pd as active components, and honeycomb ceramics as the carrier catalyst, CN101204654A discloses A noble metal catalyst for catalyzing the oxidation of benzene series at low temperature has been developed. This type of catalyst has the advantages of high oxidation activity and easy recovery, but has the disadvantages of scarce resources, high price and poor toxicity resistance.

Method used

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  • Catalyst for treating organic waste gas and preparation method thereof
  • Catalyst for treating organic waste gas and preparation method thereof
  • Catalyst for treating organic waste gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation and modification of self-made carrier

[0031] Take 28g of silicon oxide, 40g of aluminum oxide, 30g of magnesium oxide and 2g of iron oxide and mix evenly. The mixture is roasted at 1300°C and the holding time is controlled at 6h; the self-made carrier is modified with 5wt% oxalic acid solution, boiled on the electric furnace and kept for 2h, and dried The temperature is 80°C, the drying time is 2h; the calcination temperature is 400°C, the calcination time is 6h, and the modified carrier is obtained after calcination;

[0032] (2) Preparation of active component impregnation solution

[0033] Take 64.7g solid CuC 2 o 4 .1 / 2H 2 O, 71.6 g solid MnC 2 o 4 .2H 2 O and 181.7 g of distilled water were prepared to make Cu 2+ and Mn 2+ The mixed solution with a molar ratio of 1:1 was mixed with titanium gel containing 12.0 g of titanium dioxide to prepare an impregnation solution with a molar ratio of copper oxide, manganese oxide and titanium oxide of...

Embodiment 2

[0039] (1) Preparation and modification of self-made carrier

[0040] Take 50g of silica, 35g of alumina, 14g of magnesia and 1g of iron oxide and mix evenly. The mixture is roasted at 1350°C, and the holding time is controlled at 5h; the self-made carrier is modified with 10wt% oxalic acid solution, boiled on the electric furnace and kept for 2h; dry The temperature is 100°C, and the drying time is 1h; the calcination temperature is 500°C, and the calcination time is 5h, and the modified carrier is obtained through calcination.

[0041] (2) Preparation of active component impregnation solution

[0042] Take 40.0g solid CuC 2 o 4 .1 / 2H 2 O, 89.5 g solid MnC 2 o 4 .2H 2 O and 192.5 g of distilled water to prepare Cu 2+ and Mn 2+ The mixed solution with a molar ratio of 1:2 was mixed with titanium gel containing 11.3g of titanium dioxide to prepare an impregnation solution with a molar ratio of copper oxide, manganese oxide and titanium oxide of 1:2:0.75.

[0043] (3) L...

Embodiment 3

[0048] (1) Preparation and modification of self-made carrier

[0049] Take 55g of silicon oxide, 29.5g of aluminum oxide, 15g of magnesium oxide and 0.5g of iron oxide and mix evenly. The mixture is roasted at 1350°C, and the holding time is controlled at 6h; the self-made carrier is modified with 10wt% oxalic acid solution, boiled on the electric furnace and kept for 2h ; The drying temperature is 100°C, and the drying time is 1h; the calcination temperature is 500°C, and the calcination time is 5h, and the modified carrier is obtained through calcination.

[0050] (2) Preparation of active component impregnation solution

[0051] Take 25.3g solid CuC 2 o 4 .1 / 2H 2 O, 114.6 g solid MnC 2 o 4 .2H 2 O and 207.8 g of distilled water to prepare Cu 2+ and Mn 2+ The mixed solution with a molar ratio of 1:4 was mixed with titanium gel containing 9.6g of titanium dioxide to prepare an impregnation solution with a molar ratio of copper oxide, manganese oxide and titanium oxide...

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Abstract

The invention relates to a catalyst for treating organic waste gas and a preparation method thereof, belonging to the control technology of atmospheric pollution and the field of environment protection materials. In the catalyst, copper oxide, manganese oxide and titanium oxide are used as active ingredients, and a catalyst carrier is self-made; based on the mass of the carrier, the active ingredients are mixed in the molar ratio of copper oxide, manganese oxide to titanium oxide being 1-4: 1-4: 0.5-1; and the mass percentage of the capacity of the active ingredient is 1-20%. The self-made carrier is prepared by using silicon oxide, aluminum oxide, magnesium oxide and ferric oxide as components which are baked at high temperature, wherein the mass percentage of the material is 28-55% of silicon oxide, 20-40% of aluminum oxide, 10-30% of magnesium oxide and 0.5-2% of ferric oxide; and the carrier is modified or modified through an aluminum oxide coating by using 5-20% acid in mass percentage. The catalyst can completely catalyze toluene at 250 DEG C, and the complete catalysis temperature is reduced by about 20 DEG C compared with the same kind of catalysts.

Description

technical field [0001] The invention relates to a catalyst for treating organic waste gas and a preparation method thereof, belonging to the fields of air pollution control technology and environmental protection catalytic materials. Background technique [0002] Organic waste gas is one of the main air pollutants, which can enter the human body through the respiratory tract and skin, causing temporary and permanent lesions to human respiratory, blood, liver and other systems and organs. For example, the PTA oxidation tail gas contains a large amount of harmful gases, such as: benzene, toluene, xylene, methyl acetate, CO, etc., and its indicators all exceed the national emission standards, causing serious harm to the environment. In order to prevent pollution, in addition to reducing oil loss and reducing the amount of organic solvents to reduce the generation and discharge of organic waste gas, exhaust purification is currently a feasible treatment approach. The treatment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J37/02B01D53/86B01D53/72
Inventor 沈树宝黄琼张志远陈英文祝社民
Owner NANJING TECH UNIV
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