Preparation method of cassava residue activated carbon

A technology of cassava residue and activated carbon, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of cassava residue environmental pollution

Active Publication Date: 2021-09-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a method for preparing cassava residue activated carbon, to solve the problem that the cassava residue obtained from ethanol production in the prior art pollutes the environment

Method used

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  • Preparation method of cassava residue activated carbon
  • Preparation method of cassava residue activated carbon

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preparation example Construction

[0023] As described in the background art, the cassava residue obtained from ethanol production in the prior art is simply incinerated or composted, which not only greatly wastes resources, but also seriously pollutes the environment. In order to solve the above-mentioned technical problems, the invention provides a kind of preparation method of cassava residue activated carbon, such as figure 1 As shown, the method includes the following steps: thermally decomposing cassava residue to obtain biochar; removing impurities in the biochar; activating the removed biochar to obtain cassava residue activated carbon.

[0024] Using the method for preparing activated carbon from cassava residues provided by the present invention, thermally decompose cassava residues to obtain biochar, and then prepare high-quality activated carbon products through processes such as impurity removal and activation, which provides a new method for the prior art. A new way to deal with cassava residues i...

Embodiment 1

[0038] The preparation method of the cassava residue activated carbon provided by the present embodiment may further comprise the steps:

[0039] Weigh 2.5kg of cassava residues into an oven, dry at 105°C for 12 hours and then drop to room temperature; screen the dried cassava residues with 40 meshes, add the screened cassava residues to the fluidized bed reactor, and the cassava residues are fed The rate is 45g / h, the nitrogen flow rate is 0.5m 3 Rapid thermal decomposition occurs under the condition of 580℃ / h, the system pressure is normal pressure, and carbon monoxide, light hydrocarbons, bio-oil, bio-carbon and other products are obtained. The ash content of bio-carbon is 0.95% after cyclone dust removal, and cooled to room temperature ; Boil the above biochar with deionized water for 60min, filter to obtain solid biochar; add the filtered biochar to NaOH aqueous solution with a concentration of 2mol / L, heat and boil for 120min, filter and wash after cooling down to room t...

Embodiment 2

[0041] The difference between the preparation method of the cassava residue gac provided by the present embodiment and embodiment 1 is:

[0042] After drying at 100° C. for 15 hours, cool down to room temperature; screen the dried cassava residue with 60 mesh.

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Abstract

The invention provides a preparation method of cassava residue activated carbon. The preparation method comprises the following steps: thermally decomposing cassava slag to obtain biochar; removing impurities in the biochar; activating the removed biochar to obtain cassava slag activated carbon. The present invention first removes impurities and then activates the bio-carbon obtained after pyrolysis of cassava residues, thereby reducing the content of impurities in the obtained bio-carbons, thereby providing a raw material guarantee for the preparation of high-performance activated carbon products from cassava residues, and contributing to the high value of cassava residues Utilization provides strong technical support, provides a new way to deal with cassava residues in a green and environmentally friendly way, and can further obtain activated carbon products with economic benefits.

Description

technical field [0001] The invention relates to the field of activated carbon preparation, in particular to a method for preparing cassava residue activated carbon. Background technique [0002] Non-grain fuel ethanol uses cassava, Jerusalem artichoke, and sweet sorghum as raw materials to produce ethanol, and uses starch in the raw materials to produce ethanol through saccharification. As a new fuel substitute, fuel ethanol can reduce the consumption and dependence on petroleum, a non-renewable energy source, reduce environmental pollution, and ensure national energy security. Taking cassava fuel ethanol as an example, about 0.33 tons of cassava residues are produced for every 1 ton of fuel ethanol produced. It is estimated that for a cassava fuel ethanol production plant with a production capacity of 300,000 t / a, the cassava residues produced each year are as high as about 100,000 t. At present, cassava residues are generally treated by simple incineration or composting....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/336
CPCC01B32/324C01B32/336
Inventor 惠继星岳军马丹胡世洋王继艳宁艳春屈海峰徐友海
Owner PETROCHINA CO LTD
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