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Preparation method of biomass-based ferroaluminium complex spherical carbon

A biomass and spherical carbon technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of powder carbon application limitations, low spherical magnetic carbon, activated carbon loss, etc., to achieve Realize the effect of resource utilization, developed pore structure and uniform size

Active Publication Date: 2014-10-08
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the activated carbon prepared from sludge is mainly powdered carbon, its recovery has always been concerned. If the traditional filtration separation method is used, it will easily cause filter blockage or loss of activated carbon. These make powdered carbon more suitable for environmental treatment and other applications. severely restricted
However, there are few reports on the mature preparation technology of shaped magnetic activated carbon, especially the technology of preparing spherical magnetic carbon with good magnetic properties, high mechanical strength and low cost is even scarcer.

Method used

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Examples

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preparation example Construction

[0020] The preparation method of biomass-based iron-aluminum composite spherical carbon of the present invention, its specific operation steps are as follows:

[0021] Step (1), biomass pretreatment: air-dry and crush the sludge, pass through a 100-200 mesh sieve to obtain sludge powder, and set aside; crush the crop straw, pass through a 50-100 mesh sieve to obtain solid powder, and sieve the obtained solid The powder block is first soaked and softened with 3% to 9% dilute alkali solution at 40-60°C for 3-6 hours, then rinsed with deionized water until the pH value is 7.0-8.0, and then the solid powder block is placed at 50-80°C Drying at constant temperature to constant weight, and then crushing the dried solid powder to obtain straw powder, which is ready for use;

[0022] Weigh 70 parts by weight of sludge powder and 30 parts by weight of straw powder and mix evenly, and use 5% to 10% oxidation solution to carry out pre-oxidation deashing treatment with a liquid-solid rati...

Embodiment 1

[0032] Biomass pretreatment: air-dry and crush the sludge, pass through a 100-mesh sieve to obtain sludge powder, and set aside; crush the crop straw, pass through a 50-mesh sieve to obtain solid powder, and oxidize the obtained solid powder with 3% hydrogen The sodium solution was soaked and softened at 40°C for 6 hours, then rinsed with deionized water until the pH value was 7.0, and then the solid powder was dried at a constant temperature of 50°C to constant weight, and then the dried solid powder was crushed , to get straw powder, set aside; weigh 7g of sludge powder and 3g of straw powder and mix evenly, and mix with 5% H 2 o 2 The solution was pre-oxidized and deashed with a liquid-solid ratio of 1:1 for 2 hours, then rinsed with deionized water until the pH value was 7.0, and then the rinsed mixture was dried at a constant temperature of 85°C to a constant weight, and then dried Mix the dried mixture with phosphoric acid solution with a concentration of 1mol / L at a li...

Embodiment 2

[0039] Biomass pretreatment: air-dry and crush the sludge, pass through a 200-mesh sieve to obtain sludge powder, and set aside; crush crop straw, pass through a 100-mesh sieve to obtain solid powder, and use 9% hydrogen sulfate to obtain solid powder The ammonium solution was soaked and softened at 60°C for 3 hours, then rinsed with deionized water until the pH value was 8.0, and then the solid powder was dried at a constant temperature of 80°C to constant weight, and then the dried solid powder was broken , to get straw powder, and set aside; weigh 7g of sludge powder and 3g of straw powder and mix evenly, and use 10% nitric acid solution for pre-oxidation deliming treatment with a liquid-solid ratio of 3:1 for 1 hour, and then use deionized Rinse with water until the pH value is 6.0, then dry the rinsed mixture at a constant temperature of 105°C until it reaches a constant weight, then mix the dried mixture with a potassium hydroxide solution with a concentration of 3mol / L a...

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Abstract

The invention provides a preparation method of biomass-based ferroaluminium complex spherical carbon. The method comprises the steps of carrying out carbonizing treatment on raw materials including sludge and crop straw, uniformly mixing the carbonized raw materials with home-made ferroaluminium complex powder according to a certain ratio, bonding carbon powder to form a spherical magnetic carbon precursor by using water glass as a bonder, and finally carrying out certain calcining treatment on the precursor to obtain the biomass-based ferroaluminium complex spherical carbon. The preparation method is simple in process and low in production cost and is capable of realizing the resource utilization of biomass; the spherical carbon has self-sintering property, high mechanical strength and favorable magnetic property; the preparation method can be widely applied to preparation of spherical magnetic carbon in a relatively large range of sizes; the spherical carbon prepared by the method can be widely applied to the fields of sewage treatment and soil pollution control.

Description

【Technical field】 [0001] The invention relates to a preparation method in the field of environmental protection, in particular to a preparation method of biomass-based iron-aluminum composite spherical carbon. 【Background technique】 [0002] Activated carbon is mostly made of coal, wood, and fruit shells. It has the advantages of large specific surface area, highly developed pore structure, and strong adsorption capacity. It is a microcrystalline carbon with a special structure. Industry, food industry and other industries have a wide range of applications. However, the universal use of activated carbon will greatly increase the processing cost, as the activated carbon disclosed in the Chinese patent with the application number CN02160182.8 and the name "desulfurization and denitrification activated carbon and its production method", its manufacturing cost is too high, so high performance is sought Low-cost activated carbon preparation technology has been a research hotspot...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01J20/28
Inventor 刘心中刘惠萍黄永捷
Owner FUJIAN UNIV OF TECH
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