林业科学2025，Vol.61Issue(11)：138-149,12.DOI:10.11707/j.1001-7488.LYKX20250108
4种典型林业剩余物基生物炭理化性质对不同热解温度的响应
Response of Physicochemical Properties of Four Typical Forest Residue-based Biochars to Different Pyrolysis Temperatures
摘要
Abstract
[Objective]This study aims to explore the influence mechanism of different raw material sources and pyrolysis temperatures on the physicochemical properties of forest residue biochar,providing a theoretical basis for the directional preparation of forest residue-based biochar.[Method]In this study,branches of Populus spp.(poplar),Eucalyptus robusta(eucalyptus),Cunninghamia lanceolata(Chinese fir),and Pinus massoniana(masson pine)were selected as raw materials,and biochar was prepared at different pyrolysis temperatures of 300,400,500,and 600℃.The biochar was characterized using scanning electron microscopy,X-ray diffraction,and other methods to analyze its physicochemical properties such as pore structure and surface functional groups.[Result]The results showed that the pyrolysis temperature significantly affected the physicochemical properties of the biochar derived from forest residues.As the pyrolysis temperature increased from 300℃to 600℃,the yield of biochar from the branches of poplar,eucalyptus,Chinese fir,and masson pine all showed a decreasing trend.The biochar from Chinese fir branches had the highest specific surface area of 449.65 m2·g-1 at 600℃,with the largest micropore volume and micropore-specific surface area.Biochar produced from Chinese fir and masson pine had higher specific surface areas and porosity,while biochar from poplar and eucalyptus had lower specific surface area and porosity.The thermal loss behavior of biochar from masson pine and Chinese fir was similar,showing that the biochar prepared at 300℃had the poorest thermal stability,while that prepared at 600℃had the best stability.In addition,the XRD spectra of biochar from Chinese fir and masson pine showed weak diffraction peaks of CaCO3,indicating that their calcite content and crystallinity were relatively low.[Conclusion]This study elucidates the response mechanisms of four typical biochars from different forest residues to different pyrolysis temperatures.It also reveals that both pyrolysis temperature and raw material type are key factors affecting the biochar yield and physicochemical properties.By effectively controlling the pyrolysis temperature and raw materials,biochar with different functions can be tailored to meet the specific needs of various fields,providing a new pathway for the resource utilization of forest residues.关键词
生物炭/热解温度/理化特性/林业剩余物Key words
biochar/pyrolysis temperature/physicochemical property/forest residues分类
农业科技引用本文复制引用
韩婉禛,刘蕾,成洁,孙启武,董玉红,厚凌宇,张润哲..4种典型林业剩余物基生物炭理化性质对不同热解温度的响应[J].林业科学,2025,61(11):138-149,12.基金项目
国家自然科学基金项目(42407194) （42407194）
国家重点研发计划项目(2023YFF1304404). （2023YFF1304404）
