Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Physicochemical properties and hygroscopicity of tobacco stem biochar pyrolyzed at different temperatures
The physicochemical properties and hygroscopicity of biochar derived from tobacco stem pyrolysis were investigated to get the effect of pyrolysis temperature (250–950 °C). The chemical composition and structure of biochar were characterized with proximate and ultimate analysis, X-ray fluorescence, and two-dimensional perturbation-based correlation infrared spectroscopy (2D-PCIS) based on Fourier-transform infrared spectroscopy. The physical pore structure was analyzed by Brunauer-Emmett-Teller surface area. Results showed that surface area and pore volumes of biochar increased, while biochar yield, volatile matter, H/C and O/C ratios decreased with the increasing pyrolysis temperature. The 2D-PCIS analysis suggested that the intensity of hydroxyl groups and aromatic skeletal changed greatly with pyrolysis temperature. Tobacco stem biochar was abundant in Ca and K and contained P, Mg, S, and Cl, while N was low and decreased with temperature. Tobacco stem biochar produced at 550 °C has the lowest hygroscopicity under 50%–70% humidity. Biochar produced from tobacco stem may not be suitable to be used as fuel while it can be developed for soil amendment and adsorbent by optimizing pyrolysis conditions and modifications.
Physicochemical properties and hygroscopicity of tobacco stem biochar pyrolyzed at different temperatures
The physicochemical properties and hygroscopicity of biochar derived from tobacco stem pyrolysis were investigated to get the effect of pyrolysis temperature (250–950 °C). The chemical composition and structure of biochar were characterized with proximate and ultimate analysis, X-ray fluorescence, and two-dimensional perturbation-based correlation infrared spectroscopy (2D-PCIS) based on Fourier-transform infrared spectroscopy. The physical pore structure was analyzed by Brunauer-Emmett-Teller surface area. Results showed that surface area and pore volumes of biochar increased, while biochar yield, volatile matter, H/C and O/C ratios decreased with the increasing pyrolysis temperature. The 2D-PCIS analysis suggested that the intensity of hydroxyl groups and aromatic skeletal changed greatly with pyrolysis temperature. Tobacco stem biochar was abundant in Ca and K and contained P, Mg, S, and Cl, while N was low and decreased with temperature. Tobacco stem biochar produced at 550 °C has the lowest hygroscopicity under 50%–70% humidity. Biochar produced from tobacco stem may not be suitable to be used as fuel while it can be developed for soil amendment and adsorbent by optimizing pyrolysis conditions and modifications.
Physicochemical properties and hygroscopicity of tobacco stem biochar pyrolyzed at different temperatures
Chen, Hanping (Autor:in) / Lin, Guiying (Autor:in) / Wang, Xianhua (Autor:in) / Chen, Yingquan (Autor:in) / Liu, Yingpeng (Autor:in) / Yang, Haiping (Autor:in) / Shao, Jingai (Autor:in)
01.01.2016
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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