木质纤维素生物质热解动力学研究的n阶DAEM数值解

IF 0.9 Q3 ENGINEERING, MULTIDISCIPLINARY
Jonas Kristanto, Muhammad Mufti Azis, Suryo Purwono
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引用次数: 0

摘要

本研究的目的是探索分布式活化能模型(DAEMs)的最优配置。在用热重分析仪(TGA)进行非等温动力学研究时,DAEMs可用于获得动力学参数。与其他动力学模型相比,DAEMs提供了一个额外的动力学参数,用于量化每个反应的平均活化能(E)的反应程度(σ)。虽然daem在动力学研究中是有效的,但在数值上求解daem是具有挑战性的。DAEM方程包含对活化能和温度的二重积分,涉及各种数值离散。以前,许多研究人员利用DAEM来解释复杂的反应,如木质纤维素生物质热解。然而,他们中的大多数还没有提出一个数值方法来解决daem。因此,通过探索多种数值计算构型,本文提出了一种用于数值求解n阶和一阶daem的一般结构。探索包括确定活化能的最佳积分极限以及活化能与温度积分的离散化。从研究中,我们提出了一个构型,它限制了活化能的积分,从E′s -3σ到E′s +3σ。同时,温度和活化能的积分点个数必须分别为51和21。通过使用这种结构,DAEM可以在动力学研究中得到最佳利用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical Solution of nth Order DAEM for Kinetic Study of Lignocellulosic Biomass Pyrolysis
The aim of the present study was to explore the most optimal configuration to numerically solve Distributed Activation Energy Models (DAEMs). DAEMs are useful in obtaining the kinetic parameters in non-isothermal kinetic studies using a thermogravimetry analyzer (TGA). Compared to other kinetic models, DAEMs provide an additional kinetic parameter that quantifies the extent of the reaction (σ) for each reaction’s mean activation energy (E ̅). Although DAEMs are efficacious in kinetic studies, solving DAEMs numerically is challenging. The DAEM equation includes double integration with respect to activation energy and temperature, which involves various numerical discretizations. Previously, many researchers utilized a DAEM to explicate complex reactions such as lignocellulosic biomass pyrolysis. However, most of them have yet to propose a numerical approach to solve DAEMs. Therefore, by exploring multiple numerical calculation configurations, here we present a general structure to numerically solve nth order and first-order DAEMs. The exploration includes determining the optimal integration limit of activation energy and the discretization of activation energy and temperature integration. From the investigation, we came up with a configuration that limits the integration of activation energy from E ̅-3σ to E ̅+3σ. Meanwhile, the number of integration points for temperature and activation energy must be 51 and 21, respectively. By using this configuration, DAEM can be utilized optimally in kinetic studies.
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来源期刊
Journal of Engineering and Technological Sciences
Journal of Engineering and Technological Sciences ENGINEERING, MULTIDISCIPLINARY-
CiteScore
2.30
自引率
11.10%
发文量
77
审稿时长
24 weeks
期刊介绍: Journal of Engineering and Technological Sciences welcomes full research articles in the area of Engineering Sciences from the following subject areas: Aerospace Engineering, Biotechnology, Chemical Engineering, Civil Engineering, Electrical Engineering, Engineering Physics, Environmental Engineering, Industrial Engineering, Information Engineering, Mechanical Engineering, Material Science and Engineering, Manufacturing Processes, Microelectronics, Mining Engineering, Petroleum Engineering, and other application of physical, biological, chemical and mathematical sciences in engineering. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.
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