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Thermal Degradation Kinetics of Cellulose: Mechanisms and Implications for Sustainable Energy | ||
| Chemical Process Design | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 29 شهریور 1405 | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22111/cpd.2026.54070.1081 | ||
| نویسندگان | ||
| Bahador Abolpour؛ Hanie Abbaslou* | ||
| Chemical Engineering Department, Sirjan University of Technology, Sirjan, Iran. | ||
| چکیده | ||
| Cellulose is a key constituent of biomass and an important material for sustainable energy and fire-safe applications. Despite extensive studies on cellulose pyrolysis, the dominant degradation mechanism under strictly isothermal conditions remains insufficiently clarified. In this work, the thermal degradation kinetics of cellulose were systematically investigated using isothermal thermogravimetric analysis (TGA) within a narrow temperature range of 580–610 K. Both model-fitting and iso-conversional (model-free) approaches were employed to determine kinetic parameters and identify the governing reaction mechanism. The results demonstrate that cellulose degradation is predominantly governed by geometric contraction mechanisms, specifically contracting area and contracting volume models, indicating that the reaction rate is controlled by progressive reduction of the reactive interface. Power-law behavior with exponents of 1/2 and 1/3 was observed at the early stages of conversion, while nucleation and diffusion models showed limited applicability. The apparent activation energy was determined to be in the range of 1.75–2.79 × 10⁸ J·kmol-1, indicating a relatively low energy barrier for cellulose decomposition under isothermal conditions. The novelty of this study lies in the combination of strictly isothermal analysis, narrow temperature control, and comprehensive comparison of solid-state kinetic models, enabling clear identification of the dominant degradation mechanism. A predictive kinetic equation for cellulose degradation was developed, providing useful insights for reactor design, biomass conversion, and flame-retardant material development. | ||
| کلیدواژهها | ||
| Cellulose؛ Thermal decomposition؛ Kinetics؛ Thermo-gravimetric analysis؛ Diffusion model | ||
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آمار تعداد مشاهده مقاله: 3 |
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