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Naturally Nitrogen-Doped biochar Made from End-of-Life Wood Panels for SO_(2) Gas Depollution

Journal of Renewable Materials 2023年第11期11卷 3807-3829页

作者： Hamdi Hachicha Mamadou Dia Hassine Bouafif Ahmed Koubaa Mohamed Khlif Flavia Lega Braghiroli Research Forest Institute(Institut de Recherche sur les Forets IRF)University of Quebec in Abitibi-Temiscamingue(UQAT)Rouyn-NorandaQC J9X 5E4Canada Technology Center for Industrial Waste(Centre Technologique des Residus Industriels CTRI)College of Abitibi-Temiscamingue(Cégep de L’Abitibi-Témiscamingue)Rouyn-NorandaQC J9X 5E5Canada Ecole D’ingenieur de Sfax Universite de SfaxSfax3038Tunisia

Reconstituted wood panels have several advantages in terms of ease of manufacturing,but their shorter life span results in a huge amount of reconstituted wood panels being discarded in sorting centers ***,the most common approach for dealing with this waste is *** this study,reconstituted wood panels were converted into activated biochar through a two-step thermochemical process:(i)biochar production using pilot scale fast pyrolysis at 250 kg/h and 450℃;and(ii)a physical activation at three temperatures(750℃,850℃ and 950℃)using an in-house activation furnace(1 kg/h).Results showed that the first stage removed about 66% of the nitrogen from the wood panels in the form of NO,NH3,and trimethylamine,which were detected in small amounts compared to emitted CO_(2).Compared to other types of thermochemical conversion methods(e.g.,slow pyrolysis),isocyanic acid and hydrogen cyanide were not detected in this *** second stage produced activated biochar with a specific surface area of up to 865 m^(2)/g at 950℃.The volatile gases generated during activation were predominantly composed of toluene and *** two-step process resulted in nitrogen-rich carbon in the form of pyrrolic and pyridinic *** biochars were then evaluated for their SO_(2) retention performance and showed an excellent adsorption capacity of up to 2140 mg/g compared to 65 mg/g for a commercial activated carbon(889 m^(2)/g).End-of-life reconstituted wood panels and SO_(2) gas are problematic issues in Canada where the economy largely revolves around forestry and mining industries.

关键词： End-of-life wood panels pyrolysis activation biochar and activated biochar N-doped carbons SO_(2)removal

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