A study on combustion behaviour and reaction kinetics mechanism of some Egean region Turkish lignites

IF 2.2 4区 化学 Q2 Engineering
Dilan Köksal Öztürk, Menderes Levent, Kadir Gündoğan
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Abstract

The presented paper is focused on the analysis of combustion behaviour and solid-state kinetic data of oxidation reactions of Soma-Manisa and Gediz-Kütahya lignite. Oxidation process was carried out with NI-TGA and tube furnace. The samples are heated up at temperature range from 25 to 1100 °C under multiple constant heating rates 10 °C/min, 15 °C/min, 20 °C/min and 30 °C/min in nitrogen atmosphere. Combustion characterizations of coal samples are studied by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Kinetic data analysis is based on model-free approaches by Kissinger-Akashiro-Sunose (KAS) and Ozawa-Flynn-Wall (OFW) with the helping of data during experimental study. The estimated kinetic constants are compared with experimental results. Oxidation parameters such as weight loss rate, burn-out temperature and reactivity of coal samples are calculated. Maximum weight loss rates are estimated at 0.54%/min Soma-Manisa lignite and 0.51%/min and Gediz-Kütahya lignite at 30 °C/min heating rate. Activation energies of coal samples are exhibited in the range 37.6—63.7 kJ/mol and 41.5–74.5 kJ/mol using OFW and KAS methods, respectively.

土耳其爱琴海地区一些褐煤的燃烧行为和反应动力学机制研究
本文主要分析了索玛-马尼萨(Soma-Manisa)和格迪兹-库塔希亚(Gediz-Kütahya)褐煤氧化反应的燃烧行为和固态动力学数据。氧化过程使用 NI-TGA 和管式炉进行。样品在氮气环境中以 10 °C/min, 15 °C/min, 20 °C/min 和 30 °C/min 的多个恒定加热速率在 25 至 1100 °C 的温度范围内加热。通过 X 射线衍射(XRD)和傅立叶变换红外光谱(FTIR)研究煤样的燃烧特性。动力学数据分析基于 Kissinger-Akashiro-Sunose (KAS) 和 Ozawa-Flynn-Wall (OFW) 的无模型方法,并在实验研究数据的帮助下进行。估算出的动力学常数与实验结果进行了比较。计算了煤样的氧化参数,如失重率、烧尽温度和反应性。最大失重率估计为 0.54%/min Soma-Manisa 褐煤和 0.51%/min Gediz-Kütahya 褐煤,加热速度为 30 °C/分钟。使用 OFW 和 KAS 方法,煤样的活化能分别为 37.6-63.7 kJ/mol 和 41.5-74.5 kJ/mol。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Chemical Papers
Chemical Papers Chemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍: Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.
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