快速热解过程中蓖麻油、玉米淀粉、大豆蛋白、木质素、木聚糖和纤维素的热分解。
Thermal decomposition of castor oil, corn starch, soy protein, lignin, xylan, and cellulose during fast pyrolysis.
机构信息
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China.
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China.
出版信息
Bioresour Technol. 2019 Apr;278:287-295. doi: 10.1016/j.biortech.2019.01.102. Epub 2019 Jan 23.
The aim of this work was to study the pyrolysis behavior of castor oil, corn starch, soy protein, lignin, xylan, and cellulose. The pyrolysis behavior, gaseous product evolution, kinetics and thermodynamics of these model compounds were investigated via TG-FTIR under high heating rates. The TG/DTG curves showed that castor oil had the widest pyrolysis temperature zone and lignin had the highest residual rate. The apparent activation energy of these model compounds was calculated by Kissinger-Akahira-Sunose method. The kinetic results revealed that the average bond energy of chemical compositions was in the order of lipid > lignin > starch > cellulose > protein > hemicellulose. The pre-exponential factor analysis showed that there were a large number of surface reactions for soy protein and xylan during pyrolysis, however other model compounds were not surface controlled. The thermodynamic parameters including G, ΔS, ΔH for six model compounds were also calculated.
本工作旨在研究蓖麻油、玉米淀粉、大豆蛋白、木质素、木聚糖和纤维素的热解行为。通过 TG-FTIR 在高加热速率下研究了这些模型化合物的热解行为、气态产物演化、动力学和热力学。TG/DTG 曲线表明，蓖麻油的热解温度范围最宽，木质素的残余率最高。通过 Kissinger-Akahira-Sunose 法计算了这些模型化合物的表观活化能。动力学结果表明，化学成分的平均键能顺序为脂类＞木质素＞淀粉＞纤维素＞蛋白质＞半纤维素。预指数因子分析表明，大豆蛋白和木聚糖在热解过程中有大量的表面反应，而其他模型化合物则不受表面控制。还计算了六个模型化合物的热力学参数，包括 G、ΔS 和 ΔH。
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