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A carbon-based functional material with an ultra-high specific surface area and its preparation method and application

A technology of ultra-high specific surface area, carbon-based functional materials, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of low specific surface area, simple steps and low cost Effect

Active Publication Date: 2020-08-07
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of sludge carbon-based materials by catalytic pyrolysis of sludge is severely limited by the high inorganic mineral content of the remaining activated sludge, which severely limits the development of its pore size, resulting in a relatively low specific surface area.

Method used

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  • A carbon-based functional material with an ultra-high specific surface area and its preparation method and application
  • A carbon-based functional material with an ultra-high specific surface area and its preparation method and application
  • A carbon-based functional material with an ultra-high specific surface area and its preparation method and application

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Embodiment 1

[0035] Use KOH solution to alkali-treat 4L of raw mud, slowly drop the concentrated KOH solution prepared in advance into the raw mud (simultaneously drop the solution and stir), and fully mix and adjust to pH=13. After subpackaging, use a six-way agitator, adjust the rotation speed to 200r / min, and stir for 30 minutes to initially destroy the cell body structure. The sludge after alkali treatment is extracted by centrifugation, and the centrifuge is guaranteed to run for 10 minutes under the centrifugal force of 3000g (speed 5320r / min). Use a syringe filter (0.45 μm, Millex, Millipore) to filter the supernatant into a beaker, which is SEPS. The solid phase is discarded, and the process of separating and extracting SEPS from the sludge is completed. Then put it into an electric blast drying oven and bake at 105°C for 24 hours until the water is evaporated to dryness. Grind SEPS into a powder with an agate mortar and put it in a porcelain crucible.

[0036] SEPS carbon-based...

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Abstract

The invention discloses a super-high specific surface area carbon-based functional material and a preparation method and application thereof. The preparation method of the super-high specific surfacearea carbon-based functional material through coupling catalytic pyrolysis of sludge organic matter includes the following steps that firstly centrifugal filtration of sludge is conducted after alkalitreatment, supernatant is retained, the supernatant is dried and ground to powder, and then the powder is calcined at 700-900 DEG C to obtain a carbon-based adsorbent material. According to the super-high specific surface area carbon-based functional material and the preparation method and application thereof, coupling of sludge organic matter recovery and the super-high specific surface area carbon-based functional material is realized;, a sewage treatment method adopts the super-high specific surface area carbon-based functional material prepared by the preparation method to treat sewage; and the preparation method is not directly activated, compared with a general preparation method, the preparation method is simpler in step and lower in cost, we chose KOH to release the sludge organicmatter and extract SEPS during alkali treatment, at the same time, the residual KOH plays a catalytic role to the material during re-pyrolysis, and the effect of 'killing two birds with one stone' isachieved.

Description

technical field [0001] The invention relates to the technical field of chemical material preparation, in particular to a carbon-based functional material with an ultra-high specific surface area, a preparation method and application thereof. Background technique [0002] Excess activated sludge is a kind of solid waste with high processing cost. Many studies have focused on the high value-added utilization of excess activated sludge, among which catalytic pyrolysis is a very common method. Usually, before calcination, different activators are used for activation treatment and then sintered at high temperature in a tube furnace to make it have a higher specific surface area. This is because the activator can react with the sludge to promote the decomposition and transformation of the organic components in the sludge. , and gradually form polycondensed carbon to obtain an adsorbent material with a well-developed pore structure; a higher pyrolysis temperature (>400°C) is con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
CPCB01J20/20B01J20/28057B01J2220/4887C02F1/281
Inventor 张伟军汤嘉弈张彧王乾第
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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