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Preparation method of modified biomass char adsorbent applied to 30B carbon tube mercury test

A technology of biomass coke and testing method, applied in separation methods, chemical instruments and methods, and other chemical processes, etc., can solve the problems of poor biomass coke adsorption capacity, low adsorption efficiency, and high cost, and achieve multi-polarity Chemical utilization and solving the effect of low adsorbent efficiency

Inactive Publication Date: 2020-04-28
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The adsorbent used in the existing 30B carbon tube mercury measurement method has problems such as high cost and low adsorption efficiency. At the same time, it aims at the problem of weak adsorption capacity of existing biomass coke, and considering the actual coal-fired power plant combined desulfurization and denitrification. Requirements, Modification of Biomass Char Adsorbent

Method used

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  • Preparation method of modified biomass char adsorbent applied to 30B carbon tube mercury test
  • Preparation method of modified biomass char adsorbent applied to 30B carbon tube mercury test
  • Preparation method of modified biomass char adsorbent applied to 30B carbon tube mercury test

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Effect test

Embodiment 1

[0026] Use a crusher to crush the original biomass, and use the corresponding standard sieve to obtain samples within the range of 100-150 mesh; put the samples to be processed into a crucible, and place them in a muffle furnace for pyrolysis at 500°C for 10 minutes; weigh Add 100ml of 1% NH to 5g of biomass coke sample 4 In the Br solution, the magnetic stirrer was used to continuously stir for 12 h, and the stirred solution was left to stand at room temperature for 24 h. Wash the mixed solution with deionized water until the filtrate is neutral, dry the modified biomass coke obtained after filtering off the clear solution at 40°C, and store it in a reagent bottle to obtain modified biomass coke Mercury removal agent.

Embodiment 2

[0028] Use a crusher to crush the raw biomass, and use the corresponding standard sieve to sieve to obtain samples within the range of 100-150 mesh; put the samples to be processed into a crucible, and place them in a muffle furnace for pyrolysis at 600°C for 10 minutes; weigh Add 100ml of 1% NH to 5g of biomass coke sample 4 In the Br solution, the magnetic stirrer was used to continuously stir for 12 h, and the stirred solution was left to stand at room temperature for 24 h. Wash the mixed solution with deionized water until the filtrate is neutral, dry the modified biomass coke obtained after filtering off the clear solution at 40°C, and store it in a reagent bottle to obtain modified biomass coke Mercury removal agent.

Embodiment 3

[0030] Use a crusher to crush the original biomass, and use the corresponding standard sieve to obtain samples within the range of 100-150 mesh; put the samples to be processed into a crucible, and place them in a muffle furnace for pyrolysis at 500°C for 15 minutes; weigh Add 100ml of 2% NH to 5g of biomass coke sample 4 In the Br solution, the magnetic stirrer was used to continuously stir for 15 h, and the stirred solution was left to stand at room temperature for 24 h. Wash the mixed solution with deionized water until the filtrate is neutral, dry the modified biomass coke obtained after filtering off the clear solution at 50°C, and store it in a reagent bottle to obtain modified biomass coke Mercury removal agent.

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Abstract

The invention discloses a preparation method of a modified biomass char adsorbent applied to a 30B carbon tube mercury test method. The preparation method comprises the following steps: immersing biomass coke particles into an NH4Br solution according to a mass ratio of biomass coke to NH4Br of 1:(3-6), performing uniform stirring and mixing to obtain an NH4Br biomass liquid-solid mixture, performing standing at room temperature for more than 24 hours, washing the mixture with water to be neutral, performing filtering and drying to obtain the modified biomass coke mercury removal adsorbent. The NH4Br solution is used for modification, the number of functional groups on the surface of the biomass coke adsorbent is effectively increased, the surface pore structure is enriched, the adsorptioncapacity of the adsorbent is greatly improved, and the preparation method has the advantages of low cost, less pollution, environmental protection and the like, and can be applied to a 30B carbon tube mercury testing method.

Description

technical field [0001] The invention belongs to the fields of resource utilization of biomass and testing of coal-fired flue gas, and in particular relates to a preparation method of a biomass coke mercury-removing adsorbent used in the testing of 30B carbon tubes. Background technique [0002] Mercury is a highly toxic substance that can cause severe damage to the nerves and deep tissues in humans. Mercury can be converted into organic compounds (such as methylmercury and dimethylmercury) under the action of microorganisms, and accumulate and migrate in the environment for a long time through various ways, destroying the ecological environment and causing great harm to human life and health. Activated carbon has good adsorption performance and can effectively remove mercury in flue gas. However, due to the high cost of activated carbon, biomass has become an alternative. Biomass coke is a product obtained by high-temperature pyrolysis of biomass. It is cheap, rich in surf...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01D53/02B01J20/30
CPCB01D53/02B01J20/20
Inventor 王卉沈昊天吴建飞沈畅应展烽
Owner NANJING UNIV OF SCI & TECH
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