Method for preparing activated carbon by utilizing waste tire rubber

A technology for preparing activated carbon and waste tires, which is applied in the fields of material chemical industry and environmental protection. It can solve the problems of insufficient contact between raw materials and activators, increased costs, and increased activators, so as to achieve increased utilization value, low production costs, and environmental pollution. small effect

Inactive Publication Date: 2010-05-19
NANKAI UNIV
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Problems solved by technology

Usually, the carbonization and activation processes are carried out continuously or simultaneously, which often results in insufficient contact between the raw mater

Method used

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Embodiment

[0017] A method for preparing activated carbon by using waste tire rubber, the specific implementation steps are as follows: 1) crush the waste tire rubber into particles with a diameter of <5mm, the waste tire rubber has a carbon content of 60% and an ash content of 24%, and 20.0g Place in a tube furnace, carry out carbonization treatment under a nitrogen atmosphere, the heating rate is 5°C / min, the nitrogen flow rate is 0.3L / min, the carbonization temperature is 600°C, and the carbonization time is 45 minutes; 2) Cooling under a nitrogen atmosphere to Take out the carbide after room temperature, grind it into particles of uniform size with a mortar, add activator potassium hydroxide powder, the mass ratio of carbide to activator potassium hydroxide is 1:2, grind the mixture for 15 minutes to a molten state, and then The mixture was activated under a nitrogen atmosphere, the heating rate was 20°C / min, the nitrogen flow rate was 0.3L / min, the activation temperature was 850°C, a...

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Abstract

The invention discloses a method for preparing activated carbon by utilizing waste tire rubber, which separates the carbonization and activation processes in a preparation process, namely first performs carbonization and then activation. The method comprises the following steps of: 1) crushing the waste tire rubber into particles, placing the particles into reaction equipment, and carbonizing the particles in nitrogen atmosphere at a high temperature; 2) mixing the carbide and an activating agent, namely potassium hydroxide, grinding the mixture, and then performing high-temperature activation treatment in nitrogen atmosphere; and 3) cooling an activation product to room temperature in nitrogen atmosphere, acid-cleaning the activation product, then repeatedly washing the activation product to be neutral by using high-purity water, and drying the activation product to obtain a final activated carbon product. The method has the advantages of simple process, energy conservation, less environmental pollution, and low production cost; the prepared activated carbon has stable property and developed mesopores, and is particularly suitable for absorbing macromolecular compounds that activated carbon with ordinary coal quality fails to absorb and suitable to be used as a supporting material of microorganisms and a catalysts for preparing compound activated carbon; and the method fulfills the aim of changing waste into valuable, greatly increases the utilization value of the waste tire rubber, and has broad application prospect.

Description

technical field [0001] The invention belongs to the technical fields of material chemical industry and environmental protection, and in particular relates to a method for preparing activated carbon by utilizing waste tire rubber. Background technique [0002] With the rapid development of the automobile industry, the amount of waste tires is also increasing day by day. At present, more than 1.5 billion tires are scrapped every year in the world. In 2005, my country's tire output reached 318.2 million, and the annual output exceeded 300 million for the first time, making it the third largest tire producer in the world after the United States and Japan. At the same time, my country also produces up to nearly 100 million waste tires every year (this number will show a gradual increase trend), but there are nearly 30 million waste tires that cannot be recycled, and the utilization rate is very low, resulting in a serious waste of resources. waste. On the other hand, the long-t...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 廉菲祝凌燕
Owner NANKAI UNIV
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