Fabrication of spherical biochar by a two-step thermal process from waste potato peel

Xiao Yang; Eilhann E. Kwon; Xiaomin Dou; Ming Zhang; Ki Hyun Kim; Daniel C.W. Tsang; Yong Sik Ok

doi:10.1016/j.scitotenv.2018.01.052

Fabrication of spherical biochar by a two-step thermal process from waste potato peel

Xiao Yang, Eilhann E. Kwon, Xiaomin Dou, Ming Zhang, Ki Hyun Kim, Daniel C.W. Tsang, Yong Sik Ok

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

The aim of this study was to develop a new approach for the preparation of spherical biochar (SBC) by employing a two-step thermal technology to potato peel waste (PPW). Potato starch (PS), as a carbon-rich material with microscale spherical shape, was separated from PPW as a precursor to synthesizing SBC. The synthesis process comprised (1) pre-oxidization (preheating under air) of PS at 220 °C and (2) subsequent pyrolysis of the pretreated sample at 700 °C. Results showed that the produced SBC successfully retained the original PS morphology and that pre-oxidization was the key for its shape maintenance, as it reduced surface tension and enhanced structural stability. The SBC possessed excellent chemical inertness (high aromaticity) and uniform particle size (10–30 μm). Zero-cost waste material with a facile and easy-to-control process allows the method to be readily scalable for industrialization, while offering a new perspective on the full use of PPW.

Original language	English
Pages (from-to)	478-485
Number of pages	8
Journal	Science of the Total Environment
Volume	626
DOIs	https://doi.org/10.1016/j.scitotenv.2018.01.052
Publication status	Published - 2018 Jun 1

Bibliographical note

Funding Information:
This work was fully supported by the National Research Foundation of Korea (NRF) ( NRF-2015R1A2A2A11001432 ) (Contribution: 100%).

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Green chemistry
Material science
Spherical biochar
Thermochemistry
Waste management

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution

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10.1016/j.scitotenv.2018.01.052

Cite this

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title = "Fabrication of spherical biochar by a two-step thermal process from waste potato peel",

abstract = "The aim of this study was to develop a new approach for the preparation of spherical biochar (SBC) by employing a two-step thermal technology to potato peel waste (PPW). Potato starch (PS), as a carbon-rich material with microscale spherical shape, was separated from PPW as a precursor to synthesizing SBC. The synthesis process comprised (1) pre-oxidization (preheating under air) of PS at 220 °C and (2) subsequent pyrolysis of the pretreated sample at 700 °C. Results showed that the produced SBC successfully retained the original PS morphology and that pre-oxidization was the key for its shape maintenance, as it reduced surface tension and enhanced structural stability. The SBC possessed excellent chemical inertness (high aromaticity) and uniform particle size (10–30 μm). Zero-cost waste material with a facile and easy-to-control process allows the method to be readily scalable for industrialization, while offering a new perspective on the full use of PPW.",

keywords = "Green chemistry, Material science, Spherical biochar, Thermochemistry, Waste management",

author = "Xiao Yang and Kwon, {Eilhann E.} and Xiaomin Dou and Ming Zhang and Kim, {Ki Hyun} and Tsang, {Daniel C.W.} and Ok, {Yong Sik}",

note = "Funding Information: This work was fully supported by the National Research Foundation of Korea (NRF) ( NRF-2015R1A2A2A11001432 ) (Contribution: 100%). Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

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doi = "10.1016/j.scitotenv.2018.01.052",

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AU - Yang, Xiao

AU - Kwon, Eilhann E.

AU - Dou, Xiaomin

AU - Zhang, Ming

AU - Kim, Ki Hyun

AU - Tsang, Daniel C.W.

AU - Ok, Yong Sik

PY - 2018/6/1

Y1 - 2018/6/1

N2 - The aim of this study was to develop a new approach for the preparation of spherical biochar (SBC) by employing a two-step thermal technology to potato peel waste (PPW). Potato starch (PS), as a carbon-rich material with microscale spherical shape, was separated from PPW as a precursor to synthesizing SBC. The synthesis process comprised (1) pre-oxidization (preheating under air) of PS at 220 °C and (2) subsequent pyrolysis of the pretreated sample at 700 °C. Results showed that the produced SBC successfully retained the original PS morphology and that pre-oxidization was the key for its shape maintenance, as it reduced surface tension and enhanced structural stability. The SBC possessed excellent chemical inertness (high aromaticity) and uniform particle size (10–30 μm). Zero-cost waste material with a facile and easy-to-control process allows the method to be readily scalable for industrialization, while offering a new perspective on the full use of PPW.

AB - The aim of this study was to develop a new approach for the preparation of spherical biochar (SBC) by employing a two-step thermal technology to potato peel waste (PPW). Potato starch (PS), as a carbon-rich material with microscale spherical shape, was separated from PPW as a precursor to synthesizing SBC. The synthesis process comprised (1) pre-oxidization (preheating under air) of PS at 220 °C and (2) subsequent pyrolysis of the pretreated sample at 700 °C. Results showed that the produced SBC successfully retained the original PS morphology and that pre-oxidization was the key for its shape maintenance, as it reduced surface tension and enhanced structural stability. The SBC possessed excellent chemical inertness (high aromaticity) and uniform particle size (10–30 μm). Zero-cost waste material with a facile and easy-to-control process allows the method to be readily scalable for industrialization, while offering a new perspective on the full use of PPW.

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KW - Material science

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Fabrication of spherical biochar by a two-step thermal process from waste potato peel

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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