Energy, economic, and environmental impacts of sustainable biochar systems in rural China

You, S. , Li, W., Zhang, W., Lim, H., Kua, H. W., Park, Y.-K., Igalavithana, A. D. and Okg, Y. S. (2022) Energy, economic, and environmental impacts of sustainable biochar systems in rural China. Critical Reviews in Environmental Science and Technology, 52(7), pp. 1063-1091. (doi: 10.1080/10643389.2020.1848170)

Abstract

Biochar production from biomass is a promising solution to tackle the energy and environmental challenges of rural China such as air pollution, soil contamination and degradation, sustainable agricultural waste management, and climate change. Small- and medium-scale (a few kW to 3 MW) gasification systems consisting of a gasification reactor and a gas engine had an energy efficiency of 15–20% and large-scale (>5 MW) systems via an integrated gasification combined cycle had an electrical efficiency of 26–30%. Low system efficiencies and high costs incurred by collection, transport, and pretreatment are some of the major barriers to the economic feasibility of biochar production systems in China. Mobile systems or distributed biochar production systems serve as promising solutions to reduce the biomass cost by utilizing locally generated waste biomass and catering for the bioenergy and biochar demands of local rural communities. From an energy application perspective, biochar production systems can generate heat and electricity, and biochar can serve as an energy storage material in supercapacitors and rechargeable batteries systems and can be used in anaerobic digestion to enhance overall energy recovery. Biochar can be used to achieve carbon sequestration and remediation of soil, and odor control in livestock farms. Systems converting locally generated biomass into energy and biochar that are used by local villages wait to be tested to clarify the intricacies of their viability and large-scale environmental and energy impacts in rural China.

• Item Type: Articles
• Additional Information: This research was supported by the Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government (Ministry of Science and ICT (MSIT)) (No. NRF-2019M3E6A1064197) and the Scottish Funding Council Global Challenges Research Fund (SFC/AN/14/2019).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: You, Dr Siming
• Authors: You, S., Li, W., Zhang, W., Lim, H., Kua, H. W., Park, Y.-K., Igalavithana, A. D., and Okg, Y. S.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Critical Reviews in Environmental Science and Technology
• Publisher: Taylor and Francis
• ISSN: 1064-3389
• ISSN (Online): 1547-6537
• Published Online: 02 December 2020
• Copyright Holders: Copyright © 2020 Informa UK Limited, trading as Taylor and Francis Group
• First Published: First published in Critical Reviews in Environmental Science and Technology 52(7):1063-1091
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher