Faculty of Chemistry, Wrocław University of Science and Technology, Gdańska 7/9, 50-344, Wrocław, Poland.
Faculty of Chemistry, Wrocław University of Science and Technology, Gdańska 7/9, 50-344, Wrocław, Poland.
Bioresour Technol. 2022 Jan;344(Pt B):126181. doi: 10.1016/j.biortech.2021.126181. Epub 2021 Oct 29.
This article presents a methodology for determining the kinetic parameters of biomass based on thermogravimetric analysis and the Coats-Redfern procedure with 27 model equations. Maize samples stored for approximately one year were used herein. The first sub-stage of pyrolysis was a first-order reaction with nuclei growth of n = 1, and the second sub-stage indicated a different kinetic order (1.5) of the reaction. The last sub-step showed good convergence with the first-order reaction and nuclei growth of n = 1.5. The activation energy reached up to 71.6 kJ/mol for tżhe selected parts of the stalk fraction, whereas it decreased to 6.5 kJ/mol for the others. A simplified method for approximating the composition of the biomass is also presented. In the composition of stalks, the fraction of hemicellulose was the highest, followed by that of cellulose, whereas in the composition of leaves and whole plant samples, an opposite trend was observed.
本文提出了一种基于热重分析和 Coats-Redfern 法的生物质动力学参数测定方法，共使用了 27 个模型方程。本文使用了储存约一年的玉米样品。热解的第一亚阶段是具有核生长 n=1 的一级反应，第二亚阶段表明反应具有不同的动力学阶数（1.5）。最后一个亚步骤与一级反应和核生长 n=1.5 具有很好的收敛性。对于所选择的秸秆部分，活化能高达 71.6 kJ/mol，而对于其他部分，活化能降低至 6.5 kJ/mol。本文还提出了一种简化的生物质近似组成的方法。在秸秆的组成中，半纤维素的含量最高，其次是纤维素，而在叶片和全株样品的组成中，观察到相反的趋势。
