Effect of ionic liquid on thermo-physical properties of bamboo biomass

In this work, [Emim]Gly ionic liquid was used for the pretreatment of bamboo biomass followed by regeneration of cellulose-rich material. Thermal degradation study of untreated bamboo and cellulose-rich material was carried out under dynamic condition using thermogravimetric analysis. Free kinetics models of Kissinger, Ozawa, Flynn–Wall–Ozawa, and Kissinger–Akahira–Sunose were used to determine the kinetic parameters of thermal degradation process. The pattern of activation energy (E a) values with respect to % conversion values was noted different for the aforementioned models. The E a calculated using the Kissinger method were 184 and 156 kJ mol−1, and Ozawa method were 185 and 157 kJ mol−1 of untreated and treated sample of bamboo, respectively, while the values of E a calculated by Flynn–Wall–Ozawa and Kissinger–Akahira–Sunose were 71.7–203.4 kJ mol−1 and 281.7–230.7 kJ mol−1 for untreated and treated sample of bamboo, respectively. Calorific and CHNS values of both untreated and regenerated cellulose-rich material were measured by bomb calorimeter and elemental analyzer (CHNS), respectively. Both the calorific value and carbon content of the regenerated cellulose-rich material (15.62 J/kg, 37.86 %, respectively) were found to be less than those of untreated bamboo (17.40 J/kg and 43.14 %, respectively). The bamboo and regenerated cellulose-rich material were investigated by X-ray diffraction and X-ray Photoelectron Spectroscopy, and changes in the cellulose crystalline structure were correlated with thermal degradation behavior and kinetics parameters