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Baked charcoal, and preparation method and application thereof

A biochar and baking technology, applied in the field of carbon materials, can solve the problems of high resin price, easy poisoning and failure, difficult recycling of waste resin, etc., and achieve the effects of increased preparation cost, increased content and high biochar yield.

Inactive Publication Date: 2018-12-18
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resin is expensive, easy to poison and lose efficacy, and it is difficult to recycle the waste resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of baked biochar, its preparation comprises the following steps:

[0024] (1) Granulating: After washing and drying the yellow and sweet bamboo shoot shells with a hemicellulose content of 42%, it is pulverized, dried, and passed through a 60-mesh sieve to obtain biomass particles;

[0025] (2) Carbonization: Weigh 5g of biomass particles in a crucible, cover it, and place it in a muffle furnace to make the oxygen content in the furnace 5vol%, raise the temperature to 250°C at 10°C / min, and cool to room temperature after carbonization for 30min. The particles were washed to neutrality, and dried at a constant temperature of 80° C. for 24 hours to prepare baked biochar.

[0026] The yield of the prepared baked biochar was 67.3%, and the contact angle of the baked biochar was 132.8°.

Embodiment 2

[0028] A kind of baked biochar, its preparation comprises the following steps:

[0029] (1) Granulating: After washing and drying the yellow and sweet bamboo shoot shells with a hemicellulose content of 42%, it is pulverized, dried, and passed through a 60-mesh sieve to obtain biomass particles;

[0030] (2) Carbonization: Weigh 5g of biomass particles in a crucible, cover it, and place it in a muffle furnace to make the oxygen content in the furnace 10vol%, raise the temperature to 250°C at 8°C / min, and cool to room temperature after carbonization for 30min. The particles were washed to neutrality, and dried at a constant temperature of 80° C. for 24 hours to prepare baked biochar.

[0031] The yield of the prepared baked biochar was 64.5%, and the contact angle of the baked biochar was 135.3°.

Embodiment 3

[0033] A kind of baked biochar, its preparation comprises the following steps:

[0034] (1) Granulating: After washing and drying the yellow and sweet bamboo shoot shells with a hemicellulose content of 42%, it is pulverized, dried, and passed through a 60-mesh sieve to obtain biomass particles;

[0035] (2) Carbonization: Weigh 5g of biomass particles in a crucible, cover it, and place it in a muffle furnace to make the oxygen content in the furnace 5vol%, raise the temperature to 200°C at 5°C / min, and cool to room temperature after carbonization for 60min. The particles were washed to neutrality, and dried at a constant temperature of 80° C. for 24 hours to prepare baked biochar.

[0036] The yield of the prepared baked biochar was 76.8%, and the contact angle of the baked biochar was 129.4°.

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Abstract

The invention discloses a baked charcoal, and a preparation method and an application thereof. The method comprises the following steps: washing, drying, crushing and drying agricultural and forestrywastes with a hemicellulose content of above 40%, used as a raw material, carbonizing the raw material in an oxygen-limited environment, and washing and drying the carbonized raw material to obtain the baked charcoal. The baked charcoal is prepared from the agricultural and forestry wastes by a limiting oxygen technology, so the preparation method has the advantages of simplicity, low cost and high charcoal yield; and the obtained baked charcoal has a hydrophobic surface, is rich in surface functional groups, can efficiently adsorb and separate metal ions in wastewater, and provides a cheap and efficient adsorbent for the recycling of industrial wastewater.

Description

technical field [0001] The invention belongs to the field of carbon materials, and in particular relates to the preparation and application of a baked biochar adsorbent. Background technique [0002] Chromium, as the seventh most abundant element on earth, widely exists in water, air, soil and living organisms. Chromium is a silver-white metal with good ductility, high melting point, high hardness and corrosion resistance. In recent years, as the demand for chromium in many industrial production activities such as electroplating, tanning, minerals, textile printing and dyeing, alloy and glass industry continues to increase, the discharge of chromium-containing wastewater has also increased year by year. Hexavalent chromium is a common stable valence state of chromium in aqueous solution, chromate ion (CrO 4 2- ) is a stable form of hexavalent chromium in aqueous solution, which has strong chemical mobility, high solubility and strong biological toxicity. Chromium (CrO 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10B57/10B01J20/20B01J20/30C02F1/28C02F101/20C02F101/22
CPCB01J20/20B01J20/3028B01J20/3078B01J2220/4825C02F1/283C02F2101/20C02F2101/22C10B53/02C10B57/10Y02E50/10
Inventor 胡晖王培王春雪孙龙利
Owner FUZHOU UNIV
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