School of Earth Science and Environmental Engineering, Anhui University of Science and Technology, Huainan 232001, PR China.
Bioresour Technol. 2013 Feb;129:381-6. doi: 10.1016/j.biortech.2012.11.006. Epub 2012 Nov 10.
The pyrolysis behavior and kinetics of the aqueous fraction of bio-oil were studied through thermogravimetric (TG) analysis. Based on the experimental data, activation energies and kinetic parameters were calculated by the Achar differential method and the Coats-Redfern integral method, then the most probable mechanism functions and kinetics model were obtained at last. The results show that the pyrolysis of bio-oil aqueous fraction can be divided into three stages, that is, the volatilization of volatile fractions, the decomposition stage of heavy fractions and char combustion. The experimental results show that the activation energy of volatilization is higher than that of the decomposition stage. The first stage was expressed as the first order reaction and the second stage the second order reaction. The correlation coefficient between the two stages illustrates that the reactions are in well conformity with each other and the calculated value of conversion is consistent with the experimental results.
通过热重（TG）分析研究了生物油的水相的热解行为和动力学。基于实验数据，通过 Achar 微分法和 Coats-Redfern 积分法计算了活化能和动力学参数，最后得到了最可能的机理函数和动力学模型。结果表明，生物油水相的热解可以分为三个阶段，即挥发性组分的挥发、重质组分的分解和焦炭的燃烧。实验结果表明，挥发的活化能高于分解阶段的活化能。第一阶段表示为一级反应，第二阶段表示为二级反应。两个阶段的相关系数表明，反应彼此很好地吻合，转化率的计算值与实验结果一致。
