Key Laboratory of Bio-based Materials Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China; Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda J9X 5E4, Québec, Canada.
Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda J9X 5E4, Québec, Canada.
Bioresour Technol. 2020 Sep;312:123586. doi: 10.1016/j.biortech.2020.123586. Epub 2020 May 27.
The aim of this work was to study the conversion of lignocellulose into biochar and furfural through boron complexation and esterification reaction. Boric acid was used to modify lignocellulose to obtain a high biochar yield boron-lignocellulosic material through complexation and esterification reactions. Furthermore, clean furfural was obtained as the gas products of boron-lignocellulosic materials pyrolysis. The structures of the boron-lignocellulosic materials were characterized, and their compound principle was revealed. Boric acid treatments increased the initial thermal degradation temperature of lignocellulose and promoted the formation of biochar and furfural. The biochar yield rate increased by 135.7% from 18.6 to 42.9% at 600 ℃ after 5% boric acid solution treatment. Compared with pure lignocellulose, cleaner and higher quantities of furfural were obtained from boron-lignocellulose pyrolysis. Finally, the possible chemical decomposition pathways of boron-lignocellulosic materials were identified. This study provides a new perspective on the thermochemical conversion of lignocellulose to furfural and biochar.
本工作旨在通过硼络合和酯化反应将木质纤维素转化为生物炭和糠醛。采用硼酸对木质纤维素进行改性，通过络合和酯化反应获得高生物炭得率的硼木质纤维素材料。此外，硼木质纤维素材料热解得到的气体产物为清洁的糠醛。对硼木质纤维素材料的结构进行了表征，并揭示了其化合物的原理。硼酸处理提高了木质纤维素的初始热降解温度，促进了生物炭和糠醛的形成。5%硼酸溶液处理后，在 600℃下，生物炭产率从 18.6%提高到 42.9%，提高了 135.7%。与纯木质纤维素相比，硼木质纤维素热解得到的糠醛更清洁、产量更高。最后，确定了硼木质纤维素材料可能的化学分解途径。本研究为木质纤维素转化为糠醛和生物炭的热化学转化提供了新的视角。
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