Kinetics and thermodynamics profiling of CO2-driven coconut husk gasification via thermal analysis

IF 5.4 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-09-12 DOI:10.1016/j.tsep.2025.104091

Rakesh Kumar , Mahendra Ram , Sujit Y. Pimple , Md. Samiuddin , Monoj Kumar Mondal

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Abstract

This study explores the thermal degradation and gasification behavior of coconut husk as a potential feedstock for syngas production. Comprehensive biomass characterization including proximate, ultimate and biochemical analyses as well as estimating higher heating value (HHV) was conducted to assess its suitability. Thermo-gravimetric analysis (TGA) was conducted under a CO₂ environment (flow rate: 100 mL/min) across a temperature range ofroom temperature to 1000 °C, with heating rates of 10, 20, and 30 °C/min. The TGA results indicated that the primary mass loss occurred in temperature range 200 to 550 °C. Kinetic and thermodynamic parameters were evaluated by applying iso-conversional models like Kissinger-Akahira-Sunose (KAS), Tang, Flynn-Wall-Ozawa (FWO) and Starink. The mean activation energy values calculated were 57.066 kJ/mol (FWO), 52.235 kJ/mol (KAS), 52.600 kJ/mol (Starink), and 52.184 kJ/mol (Tang), all of which are lower than those reported for other biomass materials commonly used in gasification and pyrolysis. The calculated energy gap of 4.68 kJ/mol within the activation energy and the enthalpy suggesting conducive thermodynamics to form product. The reaction mechanisms and order were further elucidated using the Criado master plot and Coats-Redfern method, providing deeper insights into the gasification behavior of coconut husk under CO₂ atmospheres. These results highlight the viability of coconut husk as an economical and efficient feedstock for syngas production, thereby supporting the advancement of sustainable energy technologies.

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基于热分析的co2驱动椰子壳气化动力学和热力学分析

本研究探讨了椰子壳作为合成气生产的潜在原料的热降解和气化行为。综合生物量表征，包括近似值、终值和生化分析，以及估算高热值（HHV），以评估其适宜性。热重分析（TGA）在CO2环境下进行（流速：100 mL/min），温度范围为室温至1000°C，加热速率为10、20和30°C/min。热重分析结果表明，主要的质量损失发生在200 ~ 550℃范围内。采用Kissinger-Akahira-Sunose （KAS）、Tang、Flynn-Wall-Ozawa （FWO）和Starink等转换模型对其动力学和热力学参数进行了评价。计算得到的平均活化能分别为57.066 kJ/mol （FWO）、52.235 kJ/mol （KAS）、52.600 kJ/mol （Starink）和52.184 kJ/mol (Tang)，均低于其他常用生物质气化和热解材料的平均活化能。在活化能和焓范围内计算得到的能差为4.68 kJ/mol，表明有利于热力学生成产物。利用Criado主图和Coats-Redfern方法进一步阐明了反应机理和顺序，为研究CO2气氛下椰子壳的气化行为提供了更深入的认识。这些结果突出了椰子壳作为合成气生产经济高效原料的可行性，从而支持了可持续能源技术的进步。

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

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

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