Preparation method of high adsorption flue gas demercuration adsorbent material

A high-adsorption, adsorbent technology, used in chemical instruments and methods, gas treatment, membrane technology, etc., can solve the problems of poor adsorption performance, large specific surface area of ​​activated carbon, etc., to improve adsorption performance and load strength, excellent structure. performance, the effect of reducing the cost of preprocessing

Pending Publication Date: 2019-10-18
贾中辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention: Aiming at the characteristics of activated carbon with large specific surface area and well-developed pore structure, while the current desulfurization agent for flue gas desulfurization is still mainly lime / limestone, and the adsorption performance is not good, a high adsorption Preparation method of adsorbent material for mercury removal from flue gas

Method used

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  • Preparation method of high adsorption flue gas demercuration adsorbent material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take bamboo, cut and crush it into bamboo slices with a size of 10mm×1mm, wash them, dry them naturally, and place them in the pre-impregnation solution. After standing for 10 hours, collect the impregnated bamboo slices and place them in a filter press. Press at 25°C and 6MPa until the moisture content of the impregnated bamboo chips is 35%, and the filter bamboo chips are obtained and placed in a steam explosion equipment, and the steam explosion treatment is performed at a pressure of 1.25MPa for 3 minutes. Centrifuge for 10 min under min, collect the lower sediment and rinse with deionized water and wash until the pH of the liquid extruded from the filter press is neutral, then dry to obtain pretreated bamboo fiber; weigh 45 parts by weight and the pH is 4.8 Sodium acetate buffer solution, 10 parts of pretreated bamboo fiber and 25 parts of deionized water were mixed to obtain a base liquid, and cellulase was added to the base liquid at 50 U / g, stirred and mixed, and...

Embodiment 2

[0034] Take bamboo, cut and crush it into bamboo pieces with a size of 10mm×1mm, wash them, dry them naturally and put them in the pre-impregnation solution. After standing for 11 hours, collect the impregnated bamboo pieces and put them in a filter press. Press at 27°C and 7MPa until the moisture content of the impregnated bamboo chips is 37%, and the filter bamboo chips are obtained and placed in the steam explosion equipment, and the steam explosion treatment is performed at a pressure of 1.37MPa for 4 minutes. Centrifuge for 13 minutes under min, collect the lower precipitate and rinse with deionized water and wash until the pH of the liquid extruded from the filter press is neutral, then dry to obtain pretreated bamboo fiber; weigh 47 parts with a pH of 4.8 respectively Sodium acetate buffer solution, 13 parts of pretreated bamboo fiber and 27 parts of deionized water were mixed to obtain a base liquid, and cellulase was added to the base liquid at 50 U / g, stirred and mixe...

Embodiment 3

[0036] Take bamboo, cut and crush it into bamboo slices with a size of 10 mm × 1 mm, wash them, dry them naturally and place them in the pre-impregnation solution. After standing for 12 hours, collect the impregnated bamboo slices and place them in a filter press. Press at 30°C and 8MPa until the moisture content of the impregnated bamboo chips is 38%, and then filter the bamboo chips and put them in the steam explosion equipment. The pressure is 1.5MPa for steam explosion treatment for 5 minutes. Centrifuge for 15 minutes under min, collect the lower precipitate and rinse with deionized water and wash until the pH of the liquid extruded from the filter press is neutral, and then dry to obtain pretreated bamboo fiber; weigh 50 parts by weight and the pH is 4.8 Sodium acetate buffer solution, 15 parts of pretreated bamboo fiber and 30 parts of deionized water were mixed to obtain a base liquid, and cellulase was added to the base liquid at 50 U / g, stirred and mixed, and placed a...

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Abstract

The invention relates to a preparation method of a high adsorption flue gas demercuration adsorbent material, and belongs to the technical field of adsorbents. According to the technical scheme, a sufficient etching effect can be generated by a plasma on the inner surface and outer surface of bamboo charcoal within a suitable modification time range, so that new undulation and roughness are generated on the inner surface and outer surface of the bamboo charcoal to form many potholes, and the specific surface area is increased. The plasma can react with specific point positions on the inner surface and outer surface of the bamboo charcoal, and a large number of new oxygen-containing groups are generated, the pore size at the positions can be significantly reduced because of the accumulationof the oxygen-containing groups in pores. Etching and group formation can synergistically enhance the pore structure of the bamboo charcoal, and meanwhile the number of the oxygen-containing groups on the surface of the bamboo charcoal is increased. Because parameters such as the specific surface area and pore volume of carbon materials are key factors to determine the adsorption performance, thebamboo charcoal modified by oxygen plasma is obviously improved and enhanced in the specific surface area and the pore volume, the adsorption performance can be better, and the demercuration efficiency of the material is improved.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent material for removing mercury from flue gas with high adsorption capacity, and belongs to the technical field of adsorbents. Background technique [0002] The effective use of energy has greatly improved people's quality of life, so far, the world's energy is still mainly dependent on [0003] Fossil fuels, and coal, oil, natural gas, etc. will still be the main energy sources in the world. my country's coal resource reserves are relatively abundant, and coal occupies an absolute position in energy utilization. BP World Energy Outlook predicts the world's energy. In the prospect of China's primary energy share, it is stated that China is following the world trend and is also transforming to a low-carbon energy structure. In the next 20 years, it will vigorously develop non-fossil energy. However, coal is still The main forms of energy utilization in my country. Mercury (Hg) is silvery-whit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2257/602B01D2258/0283B01J20/20B01J20/22
Inventor 贾中辉
Owner 贾中辉
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