Method for preparing biochar by hydrothermal carbonization of shaddock peel and application thereof

A hydrothermal carbonization, grapefruit peel technology, applied in chemical instruments and methods, biofuels, alkali metal compounds, etc., can solve the problem of no grapefruit peel biochar and other problems, achieve the preparation method is simple and easy to operate, reduce costs, and solve the problem of high added value The effect of value resource utilization problem

Inactive Publication Date: 2016-11-02
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no research reports and application examples on the preparation of pomelo peel biochar by hydrothermal carbonization technology

Method used

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  • Method for preparing biochar by hydrothermal carbonization of shaddock peel and application thereof
  • Method for preparing biochar by hydrothermal carbonization of shaddock peel and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The raw grapefruit peel is pretreated to remove the impurities on the surface, and it is broken into pieces with a length of 2-5 cm and a width of 1-3 cm with a cutter. The broken grapefruit peel and deionized water are 1 kg: 20 L Proportion mixing, then transferred to a closed high-pressure reactor, hydrothermal carbonization treatment at 180 ℃, the reaction time is 10 hours, after the hydrothermal reaction is cooled to room temperature, vacuum pump filtration to obtain biochar with a water content of 20-40 wt% , Air-dried to a moisture content of less than 20 wt%, dried in an oven at a temperature of 105 ℃ for 4 hours, the moisture content was reduced to less than 5%, then crushed and sieved to 1-5 mm to obtain grapefruit peel biochar 1.

Embodiment 2

[0027] The raw grapefruit peel is pretreated to remove the impurities on the surface, and it is broken into pieces with a length of 2-5 cm and a width of 1-3 cm with a cutter. The broken grapefruit peel and deionized water are 1 kg: 20 L Proportion mixing, doping catalyst metal salt FeCl in deionized water 3 , Catalyst metal salt FeCl 3 The doping ratio with deionized water is the catalyst metal salt FeCl 3 : Deionized water = 1g: 15 L, then the solid-liquid mixture is transferred to a closed autoclave, and hydrothermally carbonized at 180 ℃. The reaction time is 10 hours. After the hydrothermal reaction is completed, it is cooled to room temperature and filtered by a vacuum pump to obtain water Biochar with a rate of 20-40 wt%, air-dried until the moisture content is below 20 wt%, and then dried in an oven at 105 ℃ for 4 hours, the moisture content is reduced to below 5%, and then crushed and sieved to 1- 5 mm, get grapefruit peel biochar 2.

Embodiment 3

[0029] The hydrothermal carbonization treatment was carried out under the condition of 260°C, and the others were the same as in Example 2, and the grapefruit peel biochar 3 was obtained.

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Abstract

The invention discloses a method for preparing biochar by hydrothermal carbonization of shaddock peel and application thereof, and belongs to the field of comprehensive utilization of wastes. The method comprises the following steps: using agricultural waste shaddock peel as a raw material, pretreating, crushing, mixing shaddock peel with deionized water, mixing a catalyst, carrying out a hydrothermal carbonization reaction, filtering, drying, and screening so as to obtain shaddock peel biochar which is applied to heavy metal pollution remediation of soil. The preparation method is simple; equipment is safe and easy to operate; the reaction process is mild and environment friendly; biochar preparation cost is low; and there is no secondary pollution. The biochar is applied to heav metal pollution remediation of soil. Therefore, utilization channels of agricultural wastes are expanded, high value-added resource utilization of shaddock peel is effectively solved, and multiple effects of waste charcoal immobilization and soil pollution control are achieved. The product has a good prospect for large-scale production and application.

Description

Technical field [0001] The invention relates to a method for preparing biochar by using agricultural waste grapefruit peel and applied to soil heavy metal pollution restoration, belonging to the field of comprehensive utilization of agricultural waste. Background technique [0002] Grapefruit is one of the main fruits in my country, with an annual output of about 2.5 million tons. It is widely planted in southern regions such as Guangdong, Guangxi, and Fujian, and sold throughout the country. After the grapefruit is eaten or processed, the remaining waste grapefruit peel is about 600,000 tons per year. Without reasonable disposal, it will cause serious environmental pollution and waste of resources. The sleeve skin has a compact structure, a compact fiber structure and a large number of pores, and contains a variety of hydroxyl groups and other groups. It is rich in organic carbon components and is a good material for preparing biochar. At the same time, the annual output of dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02B01J20/20B01J20/28B01J20/30B09C1/00
CPCB01J20/20B01J20/28016B01J2220/4825B09C1/00C10B53/02Y02E50/10
Inventor 庄海峰薛向东平立凤单胜道张敏洪孝挺
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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