Food Waste Devolatilization Kinetics with Demonstration of Its Implementation in Computational Modeling of a Fluidized Bed Pyrolysis Reactor

IF 3.1 3区 工程技术 Q3 ENERGY & FUELS
Nihal Yasir, Yassir Makkawi, Baraa Ahmed, Ondrej Masek
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引用次数: 0

Abstract

This study presents the derivation of a kinetic model for the devolatilization of post-consumption food waste using thermogravimetric analysis (TGA). The derived model was implemented in an Eulerian-Eulerian Computational Fluid Dynamics (CFD) framework to simulate pyrolysis in a fluidized bed reactor operating at 550 °C. Due to the heterogeneity and complexity of food waste composition, the reaction function and devolatilization kinetics were identified using a staged decomposition approach. As determined by TGA, these stages correspond to the decomposition of protein, cellulose, and hemicellulose approximately between 270 and 300 °C, and the decomposition of lipids approximately between 350 and 400 °C. The activation energy, obtained using three different model-free iso-conversional methods, was consistent, with an average value of \({E}_{a}\) = 219.23 kJ/mol. The pyrolysis reaction was found to follow an order-based model, with the master plot method yielding an average reaction order of \(n\) = 10.3 and an Arrhenius frequency factor of \(A\) = 1.16 × 1019 [(kmol/m3)1−n/s]. The predicted distribution of pyrolysis products, validated against experimental data, highlights the robustness of the proposed analysis and its computational implementation. This methodology provides a strong foundation for further development and adaptation to simulate the pyrolysis of food waste and other diverse feedstocks, broadening its applicability to various types of biomass.

食物垃圾脱挥发动力学及其在流化床热解反应器计算模型中的实现演示
本研究提出了利用热重分析(TGA)推导出消费后食物垃圾脱挥发的动力学模型。该模型在欧拉-欧拉计算流体动力学(CFD)框架下实现,模拟了550℃下流化床反应器的热解过程。由于食物垃圾成分的异质性和复杂性,采用分阶段分解方法对其反应函数和脱挥发动力学进行了研究。根据TGA测定,这些阶段对应于蛋白质,纤维素和半纤维素的分解大约在270至300°C之间,脂质分解大约在350至400°C之间。三种不同的无模型等转换方法得到的活化能是一致的,平均值为\({E}_{a}\) = 219.23 kJ/mol。通过主图法得到的平均反应阶数为\(n\) = 10.3, Arrhenius频率因子为\(A\) = 1.16 × 1019 [(kmol/m3)1−n/s]。根据实验数据验证了热解产物的预测分布,突出了所提出的分析及其计算实现的鲁棒性。该方法为进一步发展和适应模拟食物垃圾和其他不同原料的热解提供了坚实的基础,扩大了其对各种类型生物质的适用性。
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来源期刊
BioEnergy Research
BioEnergy Research ENERGY & FUELS-ENVIRONMENTAL SCIENCES
CiteScore
6.70
自引率
8.30%
发文量
174
审稿时长
3 months
期刊介绍: BioEnergy Research fills a void in the rapidly growing area of feedstock biology research related to biomass, biofuels, and bioenergy. The journal publishes a wide range of articles, including peer-reviewed scientific research, reviews, perspectives and commentary, industry news, and government policy updates. Its coverage brings together a uniquely broad combination of disciplines with a common focus on feedstock biology and science, related to biomass, biofeedstock, and bioenergy production.
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