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Energies 2017, 10(4), 469; doi:10.3390/en10040469

Thermal Properties of Biochars Derived from Waste Biomass Generated by Agricultural and Forestry Sectors

1
School of Environment and Chemical Engineering, Foshan University, Foshan 528000, China
2
Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, School of Environmental and Resource Sciences, Zhejiang Agricultural and Forestry University, Lin’an, Hangzhou 311300, China
3
Department of Environmental Engineering, Foshan University, Foshan 528000, China
4
Centre for Solid Waste Bioprocessing, School of Civil Engineering, School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia
5
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
6
Zhejiang Chengbang Landscape Co. Ltd., Hangzhou 310008, China
7
School of Engineering, Huzhou University, Huzhou 313000, China
8
School of Natural Resources and Environmental Science & Korea Biochar Research Center, Kangwon National University, Chuncheon 24341, Korea
9
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
10
Guangdong Dazhong Agriculture Science Co. Ltd., Dongguan 523169, China
*
Authors to whom correspondence should be addressed.
Academic Editor: S. Kent Hoekman
Received: 18 December 2016 / Revised: 20 March 2017 / Accepted: 24 March 2017 / Published: 2 April 2017
(This article belongs to the Special Issue Biomass Chars: Elaboration, Characterization and Applications)
View Full-Text   |   Download PDF [3289 KB, uploaded 25 April 2017]   |  

Abstract

Waste residues produced by agricultural and forestry industries can generate energy and are regarded as a promising source of sustainable fuels. Pyrolysis, where waste biomass is heated under low-oxygen conditions, has recently attracted attention as a means to add value to these residues. The material is carbonized and yields a solid product known as biochar. In this study, eight types of biomass were evaluated for their suitability as raw material to produce biochar. Material was pyrolyzed at either 350 °C or 500 °C and changes in ash content, volatile solids, fixed carbon, higher heating value (HHV) and yield were assessed. For pyrolysis at 350 °C, significant correlations (p < 0.01) between the biochars’ ash and fixed carbon content and their HHVs were observed. Masson pine wood and Chinese fir wood biochars pyrolyzed at 350 °C and the bamboo sawdust biochar pyrolyzed at 500 °C were suitable for direct use in fuel applications, as reflected by their higher HHVs, higher energy density, greater fixed carbon and lower ash contents. Rice straw was a poor substrate as the resultant biochar contained less than 60% fixed carbon and a relatively low HHV. Of the suitable residues, carbonization via pyrolysis is a promising technology to add value to pecan shells and Miscanthus. View Full-Text
Keywords: biochar; biomass; higher heating value (HHV); proximate analysis; renewable energy biochar; biomass; higher heating value (HHV); proximate analysis; renewable energy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, X.; Wang, H.; Strong, P.J.; Xu, S.; Liu, S.; Lu, K.; Sheng, K.; Guo, J.; Che, L.; He, L.; Ok, Y.S.; Yuan, G.; Shen, Y.; Chen, X. Thermal Properties of Biochars Derived from Waste Biomass Generated by Agricultural and Forestry Sectors. Energies 2017, 10, 469.

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