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Method, product and application of brominated flame retardant and biomass to prepare mercury-removing activated carbon

A brominated flame retardant and biomass technology, which is applied in the field of activated carbon preparation, can solve the problems of difficult regeneration of activated carbon, complicated preparation method and high carbon/mercury ratio, and achieves the advantages of improving chemical adsorption capacity, simple preparation process and promoting decomposition. Effect

Active Publication Date: 2020-09-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the preparation method of activated carbon for adsorbing mercury is complicated, the operating cost is high, and there are also problems such as high carbon / mercury ratio and difficult regeneration of activated carbon.

Method used

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  • Method, product and application of brominated flame retardant and biomass to prepare mercury-removing activated carbon
  • Method, product and application of brominated flame retardant and biomass to prepare mercury-removing activated carbon
  • Method, product and application of brominated flame retardant and biomass to prepare mercury-removing activated carbon

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preparation example Construction

[0031] Such as figure 1 Shown, a kind of brominated flame retardant of the present invention and biomass hydrothermally prepare the method for demercury activated carbon, this method is to carry out mixed hydrothermal reaction with brominated flame retardant, biomass and KOH in the reactor, and The reaction product is subjected to high-temperature carbonization to prepare a highly active mercury-removing adsorbent, which is a cheap and highly active mercury-removing adsorbent preparation method. It specifically includes the following steps:

[0032] S1 After the biomass is dried and crushed, it is mixed with brominated flame retardant particles according to the preset mass ratio;

[0033] S2 adding KOH solution to the mixture obtained in step S1 to obtain a mixed solution, and performing a hydrothermal reaction on the mixed solution under an inert atmosphere to obtain a pyrolytic carbon solid-liquid mixture;

[0034]S3 drying and grinding the pyrolytic carbon solid-liquid mi...

Embodiment 1

[0047] In this embodiment, tetrabromobisphenol A (TBBPA) and Phyllostachys pubescens powder are used as reaction raw materials, and the method for mixing hydrothermal preparation of mercury-removing activated carbon comprises the following steps:

[0048] In step (1), the biomass is washed with deionized water and dried in an oven at 105° C. for 12 hours.

[0049] In step (2), the biomass obtained in step (1) is crushed and sieved with a 60-mesh sieve.

[0050] Step (3), according to weight ratio 1:1, weigh each 10g of the biomass obtained in step (2) and tetrabromobisphenol A (TBBPA), after mixing, add the solution that contains 4.13gKOH in the mixture, after fully mixing , placed in a hydrothermal reactor.

[0051] In step (4), feed high-purity nitrogen gas into the reactor at a flow rate of 500ml / min for 30 minutes to remove oxygen and other impurity gases that affect the hydrothermal reaction in the system.

[0052] In step (5), the temperature of the hydrothermal reacti...

Embodiment 2

[0059] In this embodiment, tetrabromobisphenol A (TBBPA) and Phyllostachys pubescens powder are used as reaction raw materials, and the method for mixing hydrothermal preparation of mercury-removing activated carbon comprises the following steps:

[0060] In step (1), the biomass is washed with deionized water and dried in an oven at 105° C. for 12 hours.

[0061] In step (2), the biomass obtained in step (1) is crushed and sieved with a 60-mesh sieve.

[0062] Step (3), take by weighing 5g of biomass obtained in step (2) and 15g of tetrabromobisphenol A (TBBPA), after mixing, add a solution containing 4.06gKOH to the mixture, after fully mixing, place in hydrothermal in the reactor.

[0063] In step (4), feed high-purity nitrogen gas into the reactor at a flow rate of 500ml / min for 30 minutes to remove oxygen and other impurity gases that affect the hydrothermal reaction in the system.

[0064] In step (5), the temperature of the hydrothermal reaction is set as: raising the...

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Abstract

The invention belongs to the field of active carbon preparation, and discloses a method, a product and an application for preparing mercury removal active carbon by a bromine flame retardant and biomass. The method comprises the following steps: S1, drying and crushing the biomass, and mixing with bromine flame retardant particles according to a preset mass ratio; S2, adding a KOH solution into the mixture and carrying out hydrothermal reaction under an inert atmosphere to obtain a pyrolyzed carbon solid-liquid mixture; S3, drying and grinding the pyrolytic carbon solid-liquid mixture, and performing carbonization reaction under an inert atmosphere to obtain mercury removal activated carbon. The product is prepared by the method. According to the invention, brominated flame-retardant wasteplastics, biomass and KOH are pyrolyzed under the condition of full mixing, so that a a mercury removal adsorbent with higher mercury removal efficiency can be correspondingly obtained, the chemicaladsorption capability of the activated carbon on elemental mercury Hg0 is greatly improved, the mercury removal efficiency is improved, and therefore, the mercury removal active carbon is particularlysuitable for application occasions such as mercury removal of flue gas in power plants.

Description

technical field [0001] The invention belongs to the technical field of activated carbon preparation, and more specifically relates to a method, product and application for preparing mercury-removing activated carbon with a brominated flame retardant and biomass. Background technique [0002] At present, the annual mercury emission caused by human activities in the world has reached 1000-6000 tons, accounting for 30-55% of the global atmospheric mercury emission. Coal-fired power plants are the largest source of anthropogenic mercury emissions, accounting for half of total anthropogenic mercury emissions. The United States issued the Clean Air Mercury Regulation (CAMR) in 2005, which imposed additional restrictions on mercury emissions associated with coal-fired power plants. In 2012, the U.S. Environmental Protection Agency (EPA) promulgated the Mercury and Air Toxic Standards (MATS) regulations, forming the final standards for limiting the emissions of mercury, acid gases ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2253/102B01D2257/602B01D2258/0283B01J20/20
Inventor 于洁巴彩玲伍俊宇孙路石
Owner HUAZHONG UNIV OF SCI & TECH
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