A master plot approach on rice husk decomposition through pyrolysis and kinetic elucidation using iso-conversional models.
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| Title: | A master plot approach on rice husk decomposition through pyrolysis and kinetic elucidation using iso-conversional models. |
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| Authors: | Najar, Ishfaq1 (AUTHOR), Rasool, Tanveer1 (AUTHOR) tanveer@nitsri.ac.in |
| Source: | Energy & Environment. Aug2025, Vol. 36 Issue 5, p2314-2332. 19p. |
| Subject Terms: | *Pyrolysis, *Pyrolysis kinetics, *Mathematical decomposition, *Thermogravimetry, *Scientific method, *Activation energy, *Rice hulls, *Chemical kinetics |
| Abstract: | The present study aimed at predicting the intricate mechanism followed by the pyrolysis of locally available rice husk, uses noval modified master plots through continuous slope-based differential techniques. An average apparent activation energy was found in the range of 187.29 (KAS model) and 199.85 kJ mol−1 (OFW model), respectively. The rice husk revealed higher volatile matter; 54.51 wt-%, HHV; 18.42 MJ kg−1and a critical pyrolysis zone around 250 to 550 °C with two sharp peaks through differential thermogravimetric analysis. Using Karl–Pearson correlation, experimental curve showed highest correlation coefficient of 0.94 and 0.75 with respect to A2 and A3 models (Avrami–Erofeev) for g (α). However, for Z (α), the process is limited by first-order multi-diffusion processes (D1) coupled with solid phase surface reaction (F3) showing correlation coefficient of 0.8. The experimental data worked out the generalized model of f (α) as f (α) = 12.74 α 3 – 24 α 2 + 12.6 α - 0.92 with R 2 value of 0.99, narrating the usage of master plots for better understanding of the process. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | The present study aimed at predicting the intricate mechanism followed by the pyrolysis of locally available rice husk, uses noval modified master plots through continuous slope-based differential techniques. An average apparent activation energy was found in the range of 187.29 (KAS model) and 199.85 kJ mol−1 (OFW model), respectively. The rice husk revealed higher volatile matter; 54.51 wt-%, HHV; 18.42 MJ kg−1and a critical pyrolysis zone around 250 to 550 °C with two sharp peaks through differential thermogravimetric analysis. Using Karl–Pearson correlation, experimental curve showed highest correlation coefficient of 0.94 and 0.75 with respect to A2 and A3 models (Avrami–Erofeev) for g (α). However, for Z (α), the process is limited by first-order multi-diffusion processes (D1) coupled with solid phase surface reaction (F3) showing correlation coefficient of 0.8. The experimental data worked out the generalized model of f (α) as f (α) = 12.74 α 3 – 24 α 2 + 12.6 α - 0.92 with R 2 value of 0.99, narrating the usage of master plots for better understanding of the process. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 0958305X |
| DOI: | 10.1177/0958305X241251402 |
