Pyrolysis and kinetic behaviour of black gram straw using thermogravimetric analysis

The present study aims to investigating the thermal behavior and pyrolysis kinetics of Black Gram Straw (BGS) degradation using thermogravimetric analyzer at three heating rates (20, 30 and 40 degrees C/min). TGA results showed maximum decomposition took place in the temperature range of 180 to 380 degrees C. Three different iso-conversional models Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Starink methods were applied on TGA results to calculate the kinetic and thermodynamic parameters. Average activation energies from FWO, KAS, and Starink methods were 172.96, 172.81, and 172.54 kJ/mol and pre-exponential factors ranged from 10(10) to 10(17) s(-1) respectively. Differences between E-alpha and increment H*values (similar to 5 kJ/mol) showed the formation of the activation complex is being favored. The values of increment G* and Delta S*varied from 166.99 to 167.01kJ/mol and -66.61 to 70.13J/mol, respectively. The above kinetics, thermodynamic data can be of massive benefit to modeling, designing and developing a suitable thermochemical conversion system of black gram stalk to energy carrier.

Automated summary

The present study investigated the thermal behavior and pyrolysis kinetics of Black Gram Straw (BGS) degradation using thermogravimetric analyzer. The results showed that the maximum decomposition occurred in the temperature range of 180 to 380 degrees C. Different iso-conversional models were applied to calculate the kinetic and thermodynamic parameters. The obtained data are crucial for modeling, designing and developing a suitable thermochemical conversion system for black gram stalk to energy carrier.