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Title	Critical impacts of pyrolysis conditions and activation methods on application-oriented production of wood waste-derived biochar
ID_Doc	29119
Authors	He, MJ; Xu, ZB; Sun, YQ; Chan, PS; Lui, I; Tsang, DCW
Title	Critical impacts of pyrolysis conditions and activation methods on application-oriented production of wood waste-derived biochar
Year	2021
Published
Abstract	Wood waste-derived biochar with tunable carbon structure and surface functionality has a great potential for various environmental applications and circular economy; however, a holistic understanding on the applicationoriented production of high-efficacy biochar is lacking. Thus, the co-impacts of different pyrolysis conditions (temperature and duration) and activation methods (steam, CO2, and acid pretreatment) on the biochar properties were first investigated. A temperature of 650 degrees C was effective in forming carbonized structure in biochar, while 750 degrees C was critical for the porous structure development. A longer pyrolysis duration (>60 min) enhanced the pore volume without compromising the yield. The activated biochar exhibited a larger pore volume (2.1- to 2.9-fold of pristine biochar) for potential high-end emerging applications. The acid pretreatment effectively removed dissolved organic carbon and most metals from the biochar. This study provides an essential guidance on the fit-for-purpose designs of biochar production conditions for sustainable wood waste management.
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