Preparation of activated carbon from waste disposable bamboo chopsticks and analysis of pyrolysis process

MA Yuhui; WANG Wenhua; ZHANG Xiuzhi; ZHAO Jin; WANG Jing; ZHANG Yushan

doi:10.12030/j.cjee.201609207

2017 Volume 11 Issue 9

Article Contents

Abstract

References

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MA Yuhui, WANG Wenhua, ZHANG Xiuzhi, ZHAO Jin, WANG Jing, ZHANG Yushan. Preparation of activated carbon from waste disposable bamboo chopsticks and analysis of pyrolysis process[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5207-5212. doi: 10.12030/j.cjee.201609207

Citation:

MA Yuhui, WANG Wenhua, ZHANG Xiuzhi, ZHAO Jin, WANG Jing, ZHANG Yushan. Preparation of activated carbon from waste disposable bamboo chopsticks and analysis of pyrolysis process[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5207-5212. doi: 10.12030/j.cjee.201609207

Preparation of activated carbon from waste disposable bamboo chopsticks and analysis of pyrolysis process

1.
Institute of Seawater Desalination and Multipurpose Utilization, State Oceanic Administration, Tianjin 300192, China

Received Date: 21/11/2016
Accepted Date: 25/09/2016
Available Online: 26/08/2017

Fund Project:

Abstract

Activated carbon was prepared from waste disposable bamboo chopsticks by K2CO3 activation via 2-step method. The activated carbon was analyzed by N2-adsorption/desorption, FTIR and XRD, and the adsorption isotherm was quantified using methylene blue. The preparation process was investigated by TGA, and the pyrolysis kinetic and model were studied using Coats-Redfern method. Experimental results demonstrated that the BET surface area and total pore volume of the activated carbon were 1 262 m2·g-1 and 0.624 cm3·g-1, respectively. Aliphatic chains and oxygen-contained groups on the char surface were removed during K2CO3 activation. Larger aromatic layers were formed at (100) planes, but the graphite-like microcrystallites at (002) planes were destroyed. The methylene blue adsorption data followed Langmuir model with a maximum adsorption capacity of 336 mg·g-1. The two main pyrolysis stages of the waste disposable bamboo chopsticks can be described by one-dimensional diffusion model and second order reaction model, with the activation energies of 76.23 and 104.24 kJ·mol-1, respectively. The pyrolysis of the residual lignin in the char fitted one-dimensional diffusion model, and the activation energy was lower by 44.28 kJ·mol-1 due to K2CO3 impregnation.
- disposable bamboo chopsticks,
- activated carbon,
- thermogravimetric analysis,
- pyrolysis kinetic

References

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Preparation of activated carbon from waste disposable bamboo chopsticks and analysis of pyrolysis process

Received Date: 21/11/2016

Accepted Date: 25/09/2016

Available Online: 26/08/2017

Fund Project:

Key words:

Abstract: Activated carbon was prepared from waste disposable bamboo chopsticks by K2CO3 activation via 2-step method. The activated carbon was analyzed by N2-adsorption/desorption, FTIR and XRD, and the adsorption isotherm was quantified using methylene blue. The preparation process was investigated by TGA, and the pyrolysis kinetic and model were studied using Coats-Redfern method. Experimental results demonstrated that the BET surface area and total pore volume of the activated carbon were 1 262 m2·g-1 and 0.624 cm3·g-1, respectively. Aliphatic chains and oxygen-contained groups on the char surface were removed during K2CO3 activation. Larger aromatic layers were formed at (100) planes, but the graphite-like microcrystallites at (002) planes were destroyed. The methylene blue adsorption data followed Langmuir model with a maximum adsorption capacity of 336 mg·g-1. The two main pyrolysis stages of the waste disposable bamboo chopsticks can be described by one-dimensional diffusion model and second order reaction model, with the activation energies of 76.23 and 104.24 kJ·mol-1, respectively. The pyrolysis of the residual lignin in the char fitted one-dimensional diffusion model, and the activation energy was lower by 44.28 kJ·mol-1 due to K2CO3 impregnation.

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Preparation of activated carbon from waste disposable bamboo chopsticks and analysis of pyrolysis process

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References

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通讯作者: 陈斌, bchen63@163.com

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