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Preparation method for cobalt-modified porous charcoal catalyst for demercuration

A biochar and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as uneven dispersion of active ingredients, and achieve simple and convenient synthesis methods, large specific surface area, and source broad effect

Active Publication Date: 2019-03-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above deficiencies or improvement needs of the current mercury removal catalysts, the present invention provides a preparation method and application of a cobalt-modified porous biochar catalyst for mercury removal, so as to solve the problem of uneven dispersion of the active components of the current supported catalysts. question

Method used

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  • Preparation method for cobalt-modified porous charcoal catalyst for demercuration
  • Preparation method for cobalt-modified porous charcoal catalyst for demercuration

Examples

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Embodiment 1

[0025]The raw wood was cut into small pieces of 1cm×1cm, treated with magnetic stirring in deionized water at 90°C for 6h to remove debris and impurities on the surface, and dried in an oven at 100°C for 24h. Take 5.3115g cobalt acetate and 1.8325g ethanolamine to prepare 0.3mol / L cobalt acetate solution (solution A) and 0.3mol / L ethanolamine solution (solution B) respectively; take 30mL solution A and 30mL solution B in a beaker, add etc. A certain amount of absolute ethanol was mixed, and the resulting mixed solution was stirred in a water bath at 60° C. for 2 hours to obtain a uniform colloidal solution. Take 1 g of pretreated wood strip slices on a petri dish, use a syringe to take 2 mL of colloid solution and evenly coat the surface of wood strips, treat it in a vacuum oven at 30 °C for 1 h, and then dry it in an oven at 90 °C for 1.5 h. The process cycle is performed three times. Get 1.4604g cobalt nitrate and 0.7g urotropine, respectively prepare 0.05mol / L cobalt nitra...

Embodiment 2

[0027] The raw wood was cut into small pieces of 1cm×1cm, treated with magnetic stirring in deionized water at 90°C for 6h to remove debris and impurities on the surface, and dried in an oven at 100°C for 24h. Take 5.3115g cobalt acetate and 2.75g ethanolamine to prepare 0.3mol / L cobalt acetate solution (solution A) and 0.3mol / L ethanolamine solution (solution B) respectively; take 30mL solution A and 30mL solution B in a beaker, add etc. A certain amount of absolute ethanol was mixed, and the resulting mixed solution was stirred in a water bath at 60° C. for 2 hours to obtain a uniform colloidal solution. Take 1 g of pretreated wood strip slices on a petri dish, use a syringe to take 2 mL of colloid solution and evenly coat the surface of wood strips, treat it in a vacuum oven at 30 °C for 1 h, and then dry it in an oven at 90 °C for 1.5 h. The process cycle is performed three times. Get 1.4604g cobalt nitrate and 0.7g urotropine, respectively prepare 0.05mol / L cobalt nitrat...

Embodiment 3

[0029] The raw wood was cut into small pieces of 1cm×1cm, treated with magnetic stirring in deionized water at 90°C for 6h to remove debris and impurities on the surface, and dried in an oven at 100°C for 24h. Take 5.3115g cobalt acetate and 3.655g ethanolamine to prepare 0.3mol / L cobalt acetate solution (solution A) and 0.3mol / L ethanolamine solution (solution B) respectively; take 30mL solution A and 30mL solution B in a beaker, add etc. A certain amount of absolute ethanol was mixed, and the resulting mixed solution was stirred in a water bath at 60° C. for 2 hours to obtain a uniform colloidal solution. Take 1 g of pretreated wood strip slices on a petri dish, use a syringe to take 2 mL of colloid solution and evenly coat the surface of wood strips, treat it in a vacuum oven at 30 °C for 1 h, and then dry it in an oven at 90 °C for 1.5 h. The process cycle is performed three times. Get 1.4604g cobalt nitrate and 0.7g urotropine, respectively prepare 0.05mol / L cobalt nitra...

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Abstract

The invention discloses a preparation method for a cobalt-modified porous charcoal catalyst for demercuration and belongs to the technical field of control on mercury discharge of coal-fired flue gas.The preparation method comprises the following steps: taking fir as a charcoal carrier and taking Co3O4 as an active ingredient; adopting a sol-gel method for paving a crystal seed layer of crystal;performing hydro-thermal treatment for realizing growth of Co3O4 nanocrystal; performing carbonizing treatment, thereby acquiring a supported catalyst with high-dispersion active ingredients. According to the invention, source of raw materials is extensive, process is simple and controllable, operation conditions are mild and the demercuration efficiency of the acquired Co-modified porous charcoalcatalyst under different temperatures is above 80%.

Description

technical field [0001] The invention belongs to the technical field related to the emission control of mercury pollution from coal-fired flue gas, and more specifically relates to a method for preparing a cobalt-modified porous biochar catalyst for mercury removal. Background technique [0002] As a major air pollutant, mercury has attracted widespread attention due to its high toxicity, volatility, bioaccumulation in the environment and its serious damage to human health. Coal-fired power plants are considered to be the main source of anthropogenic emissions compared to other sources. The mercury removal efficiency of various emission control technologies mainly depends on the form of mercury present in the flue gas. There are three forms of mercury in flue gas: elemental mercury (Hg 0 ), oxidized mercury (Hg 2+ ) and particulate mercury (Hg P ). Hg can be easily removed by electrostatic precipitator (ESP) and wet flue gas desulfurization (WFGD) P and Hg 2+ . Howeve...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J35/10B01J37/02B01J37/08B01D53/86B01D53/64
CPCB01D53/8665B01J23/75B01J37/0217B01J37/0228B01J37/084B01D2258/0283B01J35/617B01J35/615
Inventor 张晓鹏张航贺高红李成峰
Owner DALIAN UNIV OF TECH
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