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Inorganic acid catalysis hydrothermal method for preparation of bamboo biochar

An inorganic acid and biochar technology, applied in chemical instruments and methods, organic fertilizers, fertilizer mixtures, etc., can solve the problems of environmental pollution, less than 10% utilization rate, waste of resources, etc., and achieve low energy consumption and high carbon sequestration efficiency. , easy to operate effect

Inactive Publication Date: 2016-09-14
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

my country's bamboo industry is developed, and the output of bamboo waste such as bamboo leaves (stems) and bamboo chips is huge, but its utilization rate is less than 10%, which not only causes waste of resources, but also causes environmental pollution if not handled properly

Method used

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  • Inorganic acid catalysis hydrothermal method for preparation of bamboo biochar

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preparation example Construction

[0022] Embodiments of the present invention provide a catalytic preparation method of bamboo biochar, comprising the following steps:

[0023] The bamboo raw material is mixed with the inorganic acid solution, then added into a hydrothermal reaction kettle to carry out catalytic hydrothermal carbonization reaction, the reaction product is cooled, filtered and separated, and the solid phase product is rinsed and dried to obtain bamboo biochar.

[0024] In the above technical solution, the present invention realizes the effective utilization of bamboo waste, improves resource utilization rate, carbon sequestration and emission reduction, and can increase the added value of products, and obtains products with excellent performance that can be used for soil and water environment restoration. Better economic and environmental benefits.

[0025] As a preferred solution, the present invention also includes a pretreatment step of bamboo raw materials: reclaiming waste bamboo leaves, b...

Embodiment 1

[0035] Such as figure 1 Shown, bamboo biochar is prepared according to the following steps:

[0036] Step 1. Recycling and pretreatment of bamboo raw materials: reclaiming the discarded bamboo leaves, bamboo stems, bamboo chips and other bamboo processing wastes produced during the bamboo processing, and removing the soil and sundries on the surface of the raw materials;

[0037] Step 2. Acid-catalyzed hydrothermal carbonization of bamboo raw materials: Mix bamboo raw materials with 1 wt % nitric acid solution, add to a hydrothermal kettle, heat the hydrothermal kettle after sealing, and carry out acid-catalyzed hydrothermal carbonization reaction. The solidification of bamboo raw materials and acid solution Liquid ratio 1kg:6L, reaction temperature 200 o C, reaction time 3 h;

[0038] Step 3. Filtration and separation of solid and liquid phase products: After the catalytic hydrothermal carbonization is completed, take out the hydrothermal reaction kettle and place it in coo...

Embodiment 2

[0042] Step 1. Recycling and pretreatment of bamboo raw materials: reclaiming the discarded bamboo leaves, bamboo stems, bamboo chips and other bamboo processing wastes produced during the bamboo processing, and removing the soil and sundries on the surface of the raw materials;

[0043] Step 2. Acid-catalyzed hydrothermal carbonization of bamboo raw materials: Mix bamboo raw materials with 1 wt % sulfuric acid solution, add to a hydrothermal kettle, heat the hydrothermal kettle after sealing, and carry out acid-catalyzed hydrothermal carbonization reaction. The solidification of bamboo raw materials and acid solution Liquid ratio 1kg:6L, reaction temperature 200 o C, the reaction time is 5 h;

[0044]Step 3. Filtration and separation of solid and liquid phase products: After acid-catalyzed hydrothermal carbonization, take out the hydrothermal reaction kettle and place it in cooling water, and cool it to 80 o After C below, open still and export mixture, obtain the solid prod...

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Abstract

The invention discloses an inorganic acid catalysis method for preparation of bamboo biochar. The method comprises the following steps: directly mixing bamboo raw material with an inorganic acid liquid, adding the mixture in a hydro-thermal kettle, conducting an acid catalysis hydrothermal carbonization reaction, wherein the solid-liquid ratio of bamboo to acid liquid is 1kg:6L-1Kg:14L; cooling the reaction products, filtering, separating, rinsing and drying the solid product to obtain the bamboo biochar. The method uses bamboo waste as the raw material for preparation of biochar and uses inorganic acid as a catalyst for preparation of biochar by acid catalysis hydrothermal carbonization reaction. The invention provides a novel way to use the bamboo waste, improves the comprehensive utilization rate of pecan, increases the added value of the product, and has the advantages of short process, mild reaction, high efficiency and good economic benefits. The invention realizes the recycling of resources, and is helpful to the fixing of carbon element, energy conservation and emission reduction, and has good ecological benefits.

Description

technical field [0001] The invention relates to the technical field of biochar preparation, in particular to a catalytic preparation method of bamboo biochar. Background technique [0002] Biochar is an insoluble, stable, highly aromatized, and carbon-rich solid substance transformed from biomass under conditions of anoxic, high temperature, and pyrolysis. Converting carbon in waste biomass into hard-to-biodegrade char (biochar) is an effective way to fix carbon dioxide and recycle agricultural waste. Studies have shown that biochar can be used not only as a high-quality energy source, but also as a slow-release carrier for fertilizers, carbon dioxide sequestering agent, and functional materials such as adsorbents. Applying biochar to the soil can improve soil fertility, prevent the spread of harmful substances, and provide a carrier for the growth of beneficial microorganisms, thereby promoting crop growth. Applying biochar to water can absorb heavy metals, organic compou...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C09K17/02
CPCB01J20/20B01J2220/485B01J2220/4875C02F1/283C09K17/02
Inventor 李音王阳戴恺晨梁伟单胜道杨瑞芹
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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