期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 626, 期 -, 页码 478-485出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2018.01.052
关键词
Spherical biochar; Green chemistry; Waste management; Material science; Thermochemistry
资金
- National Research Foundation of Korea (NRF) [NRF-2015R1A2A2A11001432]
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 degrees C and (2) subsequent pyrolysis of the pretreated sample at 700 degrees 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 mu m). 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. (C) 2018 Elsevier B.V. All rights reserved.
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