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Pyrolysis and kinetic analyses of Camel grass (Cymbopogon schoenanthus) for bioenergy

Mehmood, Muhammad Aamer, Ye, Guangbin, Luo, Huibo, Liu, Chenguang, Malik, Sana, Afzal, Ifrah, Xu, Jianren, Ahmad, Muhammad Sajjad
Bioresource technology 2017 v.228 pp. 18-24
Cymbopogon, Gibbs free energy, Ischaemum, activation energy, bioenergy, biomass, calorimetry, enthalpy, grasses, heat, models, pyrolysis
The aim of this work was to study the thermal degradation of grass (Cymbopogon schoenanthus) under an inert environment at three heating rates, including 10, 30, and 50°Cmin−1 in order to evaluate its bioenergy potential. Pyrolysis experiments were performed in a simultaneous Thermogravimetry–Differential Scanning Calorimetry analyzer. Thermal data were used to analyze kinetic parameters through isoconversional models of Flynn-Wall-Ozawa (FWO) and Kissenger-Akahira-Sunose (KSA) methods. The pre-exponential factors values have shown the reaction to follow first order kinetics. Activation energy values were shown to be 84–193 and 96–192kJmol−1 as calculated by KSA and FWO methods, respectively. Differences between activation energy and enthalpy of reaction values (∼5 to 6kJmol−1) showed product formation is favorable. The Gibb’s free energy (173–177kJmol−1) and High Heating Value (15.00MJkg−1) have shown the considerable bioenergy potential of this low-cost biomass.