Nonisothermal Kinetics Based on Two-Stage Scheme for Co-Drying of Biomass and Lignite
Nonisothermal Kinetics Based on Two-Stage Scheme for Co-Drying of Biomass and Lignite
复制标题
基于两阶段方案的生物质与褐煤共干燥的非等温动力学
DOI：
10.1080/00986445.2014.948112
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发表时间：
2016
影响因子：
2.5
通讯作者：
Taijin Lu
中科院分区：
文献类型：
--
作者：
Huanming Liu;Meiqian Chen;Zilong Han;Guanghua Chen;Taijin Lu
本研究使用热重分析技术研究了两种典型生物质（玉米秆和红松）与褐煤在氮气气氛下的非等温共干燥动力学。可以通过降低生物质的混合比例或提高加热速率来提高干燥速率。玉米杆/褐煤共混物和红松/褐煤共混物在两个降速周期内的活化能均小于其母体样品。在第一个下降速率阶段，褐煤干燥的主要机制由 Avrami-Erofeev 方程 (n= 1.5) 描述，而玉米杆、红松和混合物样品的干燥机制则符合 Mample 方程 (n= 1.0)。在第二个利率下降时期，该机制由 Avrami-Erofeev 方程（n= 1.5 orn= 2.0）描述。所有样品在 10-30°C/min 的加热速率内获得了一般动力学补偿效应相关性。在共同干燥过程中，检测到中国褐煤与玉米杆或红松之间存在显着的协同相互作用。
This study investigates nonisothermal co-drying kinetics of two typical biomasses (cornstalk and red pine) with lignite in the presence of a nitrogen atmosphere using a thermal gravimetric analysis technique. The drying rate can be increased by either decreasing the blending ratio of biomass or increasing the heating rate. The activation energies of cornstalk/lignite blends and red pine/lignite blends in the two falling rate periods are less than that of their parent samples. In the first falling rate period, the dominant mechanisms of drying for lignite are described by the Avrami–Erofeev equation (n= 1.5), while the mechanisms for the cornstalk, red pine, and mixture samples are fitted to the Mample equation (n= 1.0). In the second falling rate period, the mechanisms are described by the Avrami–Erofeev equation (n= 1.5 orn= 2.0). The general kinetic compensation effect correlations are obtained for all samples within heating rates of 10–30°C/min. Significant synergistic interactions between the Chinese lignite and cornstalk or red pine are detected during co-drying.