不同热解温度制备的烟秆生物炭理化特征分析  

Physico-chemical Characteristics of Biochars Prepared by Pyrolysis of Tobacco-stalk under Different Temperatures

作　　者：徐亮 于晓娜 李雪利 王悦霖 宋佳倩 叶协锋 卢剑 XU Liang;YU Xiao-na;LI Xue-li;WANG Yue-lin;SONG Jia-qian;YE Xie-feng;LU Jian(Tobacco Science College of Henan Agricultural University/National Tobacco Cultivation and Physiology and Biochemistry Research Centre/Key Laboratory for Tobacco Cultivation of Tobacco Industry,Zhengzhou 450002,China;China Tobacco Corporation Staff Training College,Zhengzhou 450008,China;Xichang Branch of Liangshan Prefecture company of Sichuan tobacco company,Xichang 615000,China)

机构地区：[1]河南农业大学烟草学院,国家烟草栽培生理生化研究基地,烟草行业烟草栽培重点实验室,河南郑州450002 [2]中国烟草总公司职工进修学院,河南郑州450008 [3]四川省烟草公司凉山州公司西昌分公司,四川西昌615000

出　　处：《土壤通报》2021年第1期75-81,共7页Chinese Journal of Soil Science

基　　金：烟草行业烟草栽培重点实验室资助项目(30800665);河南省烟草公司资助项目(HYKJ201301);重庆市烟草公司资助项目(NY20140401070010)资助。

摘　　要：分别对100~800℃下于马弗炉中低氧炭化制备的烟秆生物炭进行研究,分析其基础理化性质的变化。结果表明,烟草秸秆生物炭微量元素含量在热解温度为100~400℃时呈逐渐上升的趋势,在400~500℃时较为稳定;大量元素含量增加;C含量和N元素含量在100~300℃时逐渐增加,在400~800℃时先增加后下降,C/N在300~500℃时较为稳定。随着热解温度的升高,烟草秸秆生物炭表面水分子、甲基和亚甲基等官能团减少,C=C含量逐渐增多;烟草秸秆生物炭的BET比表面积、孔径、比孔容均在400~500℃时较大。烟草秸秆生物炭的中孔较多,孔隙内部特征多为墨水瓶状孔。热解温度为400~500℃时,烟杆生物炭大量和微量元素含量相对较高,C/N较为稳定,孔隙结构最为复杂。The tobacco stalk was carbonized under different temperatures from 100 ℃ to 800 ℃, and then the basic physical and chemical properties of biochars were measured. The results showed that the mineral micro-element contents of tobacco-stalk biochar were increased with the increase of pyrolysis temperature at 100-400 ℃ and kept relatively stable at 400-500 ℃. Mineral macro-element contents were showed overall an increased trend with the pyrolysis temperature rise. The contents of carbon(C) and nitrogen(N) were increased gradually from 100 ℃ to 300 ℃ and then were declined from 400 ℃ to 800 ℃, and the C/N ratio was relatively stable at 300-500 ℃. With the increase of pyrolysis temperature, surface functional groups of tobacco-stalk biochar get condensed and its aromatization degree was heightened. With the pyrolysis temperature rise, the porosity of tobacco-stalk biochar was increased first and then decreased. The BET specific surface area, pore size and pore volume of tobacco-stalk biochar were the highest at 400-500 ℃. The mesopores were the main type of pores in tobacco-stalk biochar and mainly consisted of ink-bottle-like pores. The tobacco-stalk-biochar had higher macro-and micro elements, stable C/N, and complex pore structure at 400-500 ℃.

关 键 词：烟秆 生物炭 热解温度 物理特征 化学特性 

分 类 号：X53[环境科学与工程—环境工程]