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首页> 外文期刊>Journal of Energy Engineering >Combustion Behavior and Kinetics of Turkish Lignite Blended with Biomass/Magnesite Dust
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Combustion Behavior and Kinetics of Turkish Lignite Blended with Biomass/Magnesite Dust

机译：土耳其褐煤与生物质/菱镁矿粉混合的燃烧行为和动力学

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The effect of blending on the combustion behavior of a Turkish lignite blended with biomass or magnesite dust using a thermogravimetric analyzer (TGA) coupled with a Fourier transform infrared spectrometer (FTIR) under air atmosphere has been investigated. The lignite used in this study is Tuncbilek lignite (TL), which is blended with two biomasses, olive residue (OR) and almond shell (AS), and the inorganic industrial waste, magnesite dust (MD). The blends are composed of various weight fractions of fuels, with a constant weight fraction of molasses (10% by weight) as a binding agent. TGA weight loss trends are used to obtain characteristic temperatures and to define weight conversion stages. Experimental results show three distinct stages of conversion during combustion of biomass fuels and two stages for lignite. Burnout temperature increases and the combustibility index decreases for lignite when blended with molasses. On the other hand, blending of biomass with lignite results in approximately 40 degrees C lower ignition temperatures and an increase in combustibility index and reactivity. FTIR results of biomass blend combustion indicate a positive effect in reducing the CO and SOx emissions when blended with lignite. Magnesite dust addition causes a decrease in gaseous emissions for all blending ratios having the maximum reduction at 10% by weight of magnesite. Moreover, kinetic parameters (apparent activation energy, pre-exponential factor) for each fuel are obtained using a model-fitting method (Coats-Redfern). Addition of biomass/magnesite dust to the lignite caused a decrease in apparent activation energy. Specifically, apparent activation energy of lignite decreases from 105.6 to 81.6 kJ.mol(-1) by adding molasses and reaches approximately 20 kJ.mol(-1) by adding 70% by weight of olive residue and almond shell, respectively. (C) 2018 American Society of Civil Engineers.
机译：使用热重分析仪（TGA）和傅立叶变换红外光谱仪（FTIR）在空气气氛下研究了掺混对土耳其褐煤与生物质或菱镁矿粉末掺混的燃烧行为的影响。这项研究中使用的褐煤是Tuncbilek褐煤（TL），它与两种生物质，橄榄渣（OR）和杏仁壳（AS），以及无机工业废料，菱镁矿粉（MD）混合在一起。共混物由各种重量分数的燃料组成，具有恒定重量分数的糖蜜（10％重量）作为粘合剂。 TGA失重趋势用于获得特征温度并定义重量转换阶段。实验结果表明，在生物质燃料燃烧过程中，转化分为三个不同的阶段，而褐煤则分为两个阶段。与糖蜜混合时，褐煤的燃尽温度升高，可燃性指数降低。另一方面，生物质与褐煤的混合导致着火温度降低约40摄氏度，并增加可燃性指数和反应性。与褐煤混合时，生物质混合燃烧的FTIR结果表明在减少CO和SOx排放方面具有积极作用。对于所有混合比例，菱镁矿粉尘的添加都会减少气体排放，最大减少量为菱镁矿重量的10％。此外，使用模型拟合方法（Coats-Redfern）获得每种燃料的动力学参数（表观活化能，指数前因子）。在褐煤中添加生物质/菱镁矿粉尘会导致表观活化能降低。具体而言，褐煤的表观活化能通过添加糖蜜从105.6降低至81.6 kJ.mol（-1），并通过分别添加按重量计70％的橄榄渣和杏仁壳达到约20 kJ.mol（-1）。 （C）2018美国土木工程师学会。

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