Method for preparing large-particle foam carbon by using corncob

A corncob and large particle technology, which is applied in the field of preparing large particle foamed carbon by using corncob, can solve the problems of non-biodegradation, high production cost, difficult degradation of foamed carbon, etc., and achieves high-value utilization and improved opening. The effect of high efficiency and strong adsorption capacity
CN104843670AActive Publication Date: 2015-08-19JIANGSU ACAD OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU ACAD OF AGRI SCI
Publication Date
2015-08-19

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Abstract

The invention discloses a method for preparing large-particle foam carbon by using a corncob. The method specifically comprises the following steps: drying the corncob, crushing into corncob powder, and then mixing with a catalyst to react for 30-40 minutes; adding an adhesive to react for 60 minutes, then cooling and dehydrating to obtain biomass base expandable slurry; adding a surfactant, a foaming agent and a curing agent to mix and then pouring in a mold, foaming and curing for 15-30 minutes, and drying and curing for 20-30 minutes to obtain charring precursor; then charring at the temperature of 150-350 DEG C for 20-60 minutes, curing for 4 hours at 500-600 DEG C, washing an activation product to be neutral, and drying to obtain the large-particle foam carbon. The agricultural and forestry biomass material corncob is used as a foam carbon matrix, so the consumption of a petroleum base chemical product is reduced, and high value of low-value agricultural waste is realized; the prepared foam carbon has high aperture ratio, large specific surface and strong adsorption capacity and can be applied to the field of environmental engineering such as purification of polluted water body in place of conventional active carbon.
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Description

technical field

[0001] The invention belongs to the field of foam carbon preparation, in particular to a method for preparing large particle foam carbon by using corncobs. Background technique

[0002] Foam carbon is a lightweight solid carbon material with carbon atoms as the skeleton and a porous network structure formed by stacking carbon atoms with each other. It has a large specific surface area, high porosity, excellent adsorption and compressibility, and low thermal expansion. Coefficient and other excellent properties can be used in a wide range. At present, the research and application of foamed carbon materials at home and abroad mostly use resin as raw material, and obtain foamed carbon through foaming and high-temperature carbonization of curing agent. For example, Chinese patent CN101811885 discloses a method for preparing foamed carbon with furan resin. Furan resin is used as material, auxiliary materials are added, and then carbonized after foaming an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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