article · Scientific Reports
This research investigated the non-isothermal pyrolytic decomposition of Moringa oleifera husk and Delonix regia seed pod under nitrogen conditions. The study aimed to model the kinetics, thermodynamics, and thermal performance of these biomass samples. Three isoconversional models, namely Friedman, Flynn–Wall–Ozawa, and Starink techniques, were used to deduce kinetic data, showing a strong correlation across the conversion range. Thermodynamic parameters were derived using a first-order chemical reaction model. The activation energy profiles revealed two distinct regions, with higher average activation energies in the second region. The thermal process for both samples was consistently endothermic. Overall, the kinetic and thermodynamic parameters varied significantly with conversion, highlighting the inherent complexity of thermally converting lignocellulosic biomass.
Understanding how biomass materials like plant husks and pods break down under heat is crucial for developing sustainable energy and material production methods. This research provides fundamental insights into the thermal conversion processes, which can inform the design of more efficient and effective bioenergy technologies.
This research provides fundamental kinetic and thermodynamic data for the pyrolytic decomposition of specific biomass materials. Such foundational understanding is essential for the early-stage development of technologies that convert agricultural waste into valuable products like biofuels or biochemicals. However, the abstract does not indicate a specific application pathway, target user, or readiness level for commercialisation.
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Abstract A non-isothermal decomposition of Moringa oleifera husk and Delonix regia seed pod was carried out in an N 2 pyrolytic condition with the primary objective of undertaking the kinetics modeling, thermodynamics and thermal performance analyses of the identified samples. Three different isoconversional models, namely, differential Friedman, Flynn–Wall–Ozawa, and Starink techniques were utilized for the deduction of the kinetics data. The thermodynamic parameters were deduced from the kinetic data based on a first-order chemical reaction model. In the kinetics study, a strong correlation (R 2 > 0.9) was observed throughout the conversion range for all the kinetic models. The activation energy profiles showed two distinctive regions. In the first region, the average activation energy values were relatively higher—a typical example is in the Flynn–Wall–Ozawa technique—MH (199 kJ/mol) and RP (194 kJ/mol), while in the second region, MH (292 kJ/mol) and RP (234 kJ/mol). It was also demonstrated that the thermal process for the samples experienced endothermic reactions thought the conversion range. In summary, both the kinetic and thermodynamic parameters vary significantly with conversion—underscoring the complexity associated with the thermal conversion of lignocellulosic biomass samples.
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DOI: 10.1038/s41598-021-93407-1
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