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

作　　者：Hamdi Hachicha Mamadou Dia Hassine Bouafif Ahmed Koubaa Mohamed Khlif Flavia Lega Braghiroli 

机构地区：[1]Research Forest Institute(Institut de Recherche sur les Forets,IRF),University of Quebec in Abitibi-Temiscamingue(UQAT),Rouyn-Noranda,QC J9X 5E4,Canada [2]Technology Center for Industrial Waste(Centre Technologique des Residus Industriels,CTRI),College of Abitibi-Temiscamingue(Cégep de L’Abitibi-Témiscamingue),Rouyn-Noranda,QC J9X 5E5,Canada [3]Ecole D’ingenieur de Sfax,Universite de Sfax,Sfax,3038,Tunisia

出　　处：《Journal of Renewable Materials》2023年第11期3807-3829,共23页可再生材料杂志(英文)

基　　金：funded by the Ministere de l’Economie,de la Science et de l’Innovation du Quebec,the Natural Sciences and Engineering Research Council of Canada(NSERC);the Consortium de recherche et innovations en bioprocedes industriels au Quebec(Cribiq);the Canada Research Chair Program,the College of Abitibi-Temiscamingue;the Industrial Waste Technology Centre(Centre Technologique des Residus Industriels)through its partner on this project,Airex Energy.

摘　　要：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 yearly.Currently,the most common approach for dealing with this waste is incineration.In 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 study.The 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 benzene.This two-step process resulted in nitrogen-rich carbon in the form of pyrrolic and pyridinic nitrogen.Activated 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 

分 类 号：O64[理学—物理化学]