Method for preparing active carbon from caudex of sisal

A technology of activated carbon and sisal, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high price of activated carbon products, expensive coconut shell raw materials, complicated process, etc., and achieve excellent adsorption performance and large pore volume , The effect of simple process

Inactive Publication Date: 2004-03-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like other core shell activated carbon, the production of coconut shell activated carbon needs to go through carbonization → crushing → activation → re-crushing and other processes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0014] Embodiments 1 to 3: Wash the sisal stems with water and then dry them. According to the size of the sample tank of the carbonization activation furnace, they are sawed into small pieces, about 10 to 20 cm long, 5 cm wide and 3 cm high, and then use the concentration The 5wt% diammonium hydrogen phosphate solution was soaked at room temperature for 24 hours for stabilization pretreatment; after drying, the raw materials were placed in a carbonization activation furnace, and heated to 850 °C at a heating rate of 5 °C / min under nitrogen protection for carbonization. 15 minutes, and maintained at this constant temperature, the feedstock was activated for 30, 60 and 90 minutes by introducing steam at a flow rate of about 2 mL / min. After the reaction, the heating was stopped and allowed to cool to room temperature naturally. The reactant is taken out from the furnace, washed with water and dried to obtain the sisal stem-based activated carbon product.

[0015] Table 1 shows ...

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PUM

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Abstract

A process for preparing activated carbon from sisal hemp stem includes immersing, charring and activating with steam under protection of N2, water washing and baking. Its advantages are large specific surface area, rich mesopore (40-70%), better adsorbability and a certain redox power.

Description

technical field [0001] The invention belongs to the technical field of activated carbon manufacture, and specifically refers to a method for preparing activated carbon by using sisal stems as raw materials. Background technique [0002] Activated carbon is a porous adsorbent, widely used in petroleum, chemical, food, medicine, light industry, environmental protection, national defense and other fields. There are various raw materials for the manufacture of activated carbon. Commonly used materials include wood, coal, fruit stone, fruit shell, polymer and industrial waste. my country has a vast territory, abundant natural resources, and different regions have their own characteristics. There are many kinds of plant-based raw materials that can be used for activated carbon production. Many of them have been industrialized, and some are in the experimental stage. [0003] However, with the increasing environmental awareness of the whole society, people are paying more and more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C01B32/336
Inventor 曾汉民陈凤婷
Owner SUN YAT SEN UNIV
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