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首页> 外文期刊>Combustion Science and Technology >Evaluation of Pore Size and Surface Morphology during Devolatilization of Coconut Fiber and Sugarcane Bagasse
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Evaluation of Pore Size and Surface Morphology during Devolatilization of Coconut Fiber and Sugarcane Bagasse

机译：椰子纤维脱硼化孔径和表面形态的评价，甘蔗棒

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摘要

The prospect of exhaustion of fossil fuels and climate change caused due to the extreme use of fossil fuel consequence shifting energy supply from fossil energy to renewable energy. India ranks the second-largest producer of agricultural products and generates huge quantities of agricultural crop residues. These agricultural residues are a promising source of energy producing components. The goal of the present investigation is to study the effect of biomass particle size and devolatilization temperature varied from 500 degrees C to 800 degrees C on pore size distribution, pore volume, surface area, surface morphology, and a structural parameter of the biomass char. The Scanning Electron Microscope images results reveal the variations in the surface morphology of coconut fiber and sugarcane bagasse biomass chars and the decreases of pore fractions with an increase in temperature. Biomass char samples are mesoporous and microporous in nature confirmed by Barrett, Joyner, and Halenda (BJH) analysis, pore size ranging from 25 to 350 angstrom for mesoporous and 1.0 to 20 angstrom for microporous particles with open-ended adsorption-desorption isotherms and a substantial increase in BET surface area was observed at all the varied temperatures. A polynomial regression approach is adopted to find a relation between the pore volumes and pore size using thickness plot data to calculate the structural parameter. The structural parameter is a factor which predicts the behavior of Random Pore Model for char combustion kinetics. If the structural parameter is large then the model will result in a maximum reaction rate as the reaction proceeds, due to the growth of the size of the cylindrical pore causes an increase in the available surface area for reaction and results in an increase in the rate of reaction. Finally, as the reaction proceeds due to more pores interaction and pores overlapping, the available surface area decreases and therefore the rate decreases as the structural parameter value is smaller. The structural parameter estimated for mesopore size and micropore size ranges between 6.0 and 18.0 for Sugarcane Bagasse and 7.0 and 17.0 for coconut fiber particles.
机译：由于极端使用化石燃料后果，使化石能源从化石能源转移到可再生能源，因此耗尽化石燃料和气候变化的前景。印度排名第二大农产品生产国，并产生大量的农业作物残留物。这些农业残留物是能源生产部件的有希望的来源。本研究的目标是研究生物质粒度和脱挥发化温度在孔径分布，孔隙体积，表面积，表面形态和生物质炭的结构参数上变化的影响。扫描电子显微镜图像结果揭示了椰子纤维和甘蔗蛋白生物量镰状物表面形态的变化，并随温度的增加而降低孔隙级分。 Beomass Char样品是Barrett，Joyner和Halenda（BJH）分析的介孔和微孔的性质中，孔径为25至350埃的介孔，对于具有开放式吸附 - 解吸等温线的微孔颗粒，1.0至20埃。在所有变化的温度下观察到BET表面积大幅增加。采用多项式回归方法来使用厚度绘制数据找到孔体积和孔径之间的关系，以计算结构参数。结构参数是预测Char燃烧动力学随机孔模型的行为的因素。如果结构参数大，则该模型将导致最大反应速率随着反应的进行，由于圆柱形孔的尺寸的生长导致可用表面积的增加进行反应并导致速率的增加反应。最后，由于反应由于更多的孔相互作用和孔重叠而进行，随着结构参数值较小，可用表面积降低，因此速率降低。用于中孔尺寸和微孔尺寸的结构参数，甘蔗果甘蔗棒的6.0和18.0之间的范围为7.0和17.0，用于椰子纤维颗粒。

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