摘要
为表征不同作物秸秆加工制成的生物质炭的理化性质差异,以玉米、水稻和油菜的秸秆为原料制备生物质炭,借鉴材料科学的方法,研究其形貌结构、表面特性和有机组分元素比等内容。结果表明:200℃→450℃作物秸秆样品失重量和失重速率最大,半纤维素和纤维素为主要燃失物质。玉米、水稻和油菜的秸秆生物质炭均为多孔结构,孔隙大小和形状各异。水稻秸秆炭的比表面积最大(2.65 m2 g-1)、油菜秸秆炭次之(2.56 m2 g-1)、玉米秸秆炭最小(1.84 m2 g-1)。水稻、玉米、油菜秸秆炭的孔体积变化率分别在43 nm、62 nm、48 nm处达到峰值。油菜秸秆炭的H/C最小、为0.03,O/C和(O+N)/C最大、分别为1.15和1.19。因此,450℃更利于残留样品质量;生物质炭的孔隙结构决定其比表面积,油菜秸秆炭具有更强的芳香性、亲水性和极性。研究结果可为生物质炭的制取和应用提供参考依据。
The physical and chemical properties of different straw biocharwere studied to provide references for the preparation and application of straw biochar.The morphology structure,surface characteristics,and element ratio of organic constituents of corn,rice and rape straw biocharswere analyzed.The results showed that the weight loss of crop straw sample mainly as hemicellulose and cellulose were the largest when it prepared between 200℃and 450℃.corn,rice and rape straw biochars had porous structure with different pore sizes and shapes.The specific surface areas of biochar decreased as the follow of rice straw biochar>rape straw biochar>corn straw biochar,with the value of 2.65 m2 g-1,2.56 m2 g-1 and 1.84 m2 g-1,respectively.The changes in pore volumes of rice,corn and rape straw biochars were the largest at 43 nm,62 nm and 48 nm,respectively.The rape straw biochar had the minimum H/C of 0.03,and the maximum O/C of 1.15 and(O+N)/C of 1.19.The carbonization temperature at 450℃was conducive to removing volatiles and residual sample quality from biomass.The specific surface area of biocharwas controlled by pore structure,and rape straw biochar had stronger aromaticity,hydrophilicity and polarity.
作者
侯建伟
邢存芳
邓小梅
陈芬
刘敏
王祖华
李泰君
胡玉玲
HOU Jian-wei;XING Cun-fang;DENG Xiao-mei;CHEN Fen;LIU Min;WANG Zu-hua;LI Tai-jun;HU Yu-ling(College of Agroforestry Engineering and Planning,TongRen University,Tongren 554300,China;Personnel Department,TongRen University,Tongren 554300,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2020年第1期130-135,共6页
Chinese Journal of Soil Science
基金
铜仁学院2019年产业扶贫专项资金科研项目(FP201903)
铜仁学院博士科研启动基金项目(trxyDH1702)资助。
关键词
生物质炭
热重分析
微观特征
有机组分
Biochar
Thermogravimetric analysis
Microscopic characteristics
Organic constituent
