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Demercuration catalyst for flue gas and preparation method and applications thereof

A catalyst and catalyst carrier technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of low surface activity of natural ore carriers, poor ability of modified ore to support transition metals, etc., and achieve improved adsorption. and binding capacity, increase the carboxyl active site, increase the effect of activity and stability

Active Publication Date: 2018-12-07
JIANGSU ZHONGNENG POWER EQUIP
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention proposes a mercury removal catalyst for flue gas, the purpose of which is to solve the shortcomings of low surface activity of the natural ore carrier and relatively poor ability of the modified ore to support transition metals

Method used

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  • Demercuration catalyst for flue gas and preparation method and applications thereof
  • Demercuration catalyst for flue gas and preparation method and applications thereof

Examples

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Embodiment 1

[0023] Example 1MnO x - Preparation of starch-bentonite (BS2.5-M25)

[0024] (1) Put 1.25g of cornstarch in a 200mL small beaker, slowly pour 100mL of 5% acetic acid solution to fully dissolve the starch, then add 50g of bentonite to the beaker, place it in a water bath at 45°C and stir for 10 hours. Then put the mixture on a small porcelain boat and dry it in an oven at 105°C for 24 hours to obtain a starch-bentonite composite (BS2.5).

[0025] (2) Pour 30mL of deionized water and 10mL of absolute ethanol into a 200mL small beaker, mix well, add 8g of starch-bentonite compound, stir until fully dissolved, then add 2g of KMnO4, continue to stir for 3h and let it stand for 12h, then mix the mixture Suction filtration was carried out, and the product after suction filtration was dried in an oven at 105° C. for 24 hours, and the finally obtained sample was recorded as MnOx-starch-bentonite.

[0026] (3) The sample is recorded as BS2.5-M25, where B is bentonite, S is starch, 2.5...

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Abstract

The invention discloses a demercuration catalyst for flue gas and a preparation method and applications thereof. Bentonite is taken as the matrix of the carrier material of the demercuration catalyst.Starch is intercalated into bentonite to form a starch-bentonite composite. The active components are loaded on the surface of the starch-bentonite composite and composed of manganese oxides and carboxyl groups, which are obtained by oxidizing hydroxyl groups of the starch molecules. The demercuration catalyst has stable and high demercuration efficiency; the preparation process does not need burning, the preparation method is simple, the activity of MnOx is guaranteed, and the energy consumption is reduced at the same time.

Description

technical field [0001] The invention belongs to the field of air purification, and more specifically relates to a mercury removal catalyst for flue gas and its preparation method and application. Background technique [0002] Coal is the main energy consumption in China. Mercury emitted by coal-fired power plants is the main source of man-made emissions into the atmosphere. Mercury released into the atmosphere will accumulate in the human body after entering the biosphere, seriously endangering human health. At present, adsorbents or catalysts are mainly used to remove mercury from flue gas. Among them, the more effective flue gas mercury removal adsorbents are activated carbon and modified activated carbon, but the cost of carbon-based adsorbents is relatively high, and carbon-based adsorbents mixed with fly ash will increase the carbon content of fly ash and reduce the quality of fly ash . Natural minerals widely exist in nature, and the cost is relatively low. However,...

Claims

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Application Information

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IPC IPC(8): B01J31/32B01D53/86B01D53/64
CPCB01D53/8665B01D2257/602B01D2258/0283B01J31/32
Inventor 丁为平徐明厚陈克祥奚莹顾斌张达健戴永志
Owner JIANGSU ZHONGNENG POWER EQUIP
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