Abstract

In this study, torrefaction effect on thermal decomposition of cattle manure under air atmosphere at different heating rates (10–30–50°C/min) was investigated by thermogravimetric analysis. Iso-conversional kinetic methods of FWO (Flynn–Wall–Ozawa), KAS (Kissenger–Akahira–Sunose) and Starink were used to estimate the activation energy and thermodynamic properties. The results revealed that torrefaction improved the quality of manure, increased the FC/VM, decreased the H/C and O/C ratios and enhanced the energy yield. 1 h torrefaction process at 250°C has increased the calorific value of cattle manure about 14%. The energy density is increased by 1.27 times. The average Ea values estimated with FWO, KAS, and Starink kinetic methods were obtained as 152.46 kJ/mol (CM), 127.17 kJ/mol (TCM); 153.25 kJ/mol (CM), 122.36 kJ/mol (TCM); 155.93 kJ/mol (CM), 132.48 (TCM), respectively. Kinetics and thermodynamic parameters have shown that torrefaction is significant for energy valorization of cattle manure.

中文翻译：

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用于牛粪能量增值的烘焙：燃烧性能、动力学、热力学

摘要

在这项研究中，通过热重分析研究了空气气氛下不同加热速率（10-30-50°C/min）下烘烤对牛粪热分解的影响。FWO（Flynn-Wall-Ozawa）、KAS（Kissenger-Akahira-Sunose）和 Starink 的等转化动力学方法用于估计活化能和热力学性质。结果表明，烘焙提高了粪便质量，增加了FC/VM，降低了H/C和O/C比，提高了能量产量。在 250°C 下烘烤 1 小时，牛粪的热值增加了约 14%。能量密度提高了1.27倍。用 FWO、KAS 和 Starink 动力学方法估计的平均 Ea 值分别为 152.46 kJ/mol (CM)、127.17 kJ/mol (TCM)；153.25 kJ/mol (CM)、122.36 kJ/mol (TCM)；155.93 kJ/mol (CM), 分别为 132.48 (TCM)。动力学和热力学参数表明，烘焙对于牛粪的能量增值具有重要意义。