Kinetics and optimization of microwave-assisted lignin fractionation with Protic low transition temperature mixture of Sesamum indicum straw for enhanced bioethanol production

Abstract

Six novel low transition temperature mixtures were synthesized as two groups of ternary protic (tpLTTM) and binary amphiphilic (aLTTM) mixtures. The thermophysical assessment of these LTTMs was evaluated as a function of temperature. Sustainable delignification for sesame straw and Hansen solubility using kraft lignin was determined as a function of relative energy difference (RED). CLG exhibited lowest RED (0.86) implying elevated lignin affinity (63.2%). Pretreatment kinetics and optimization for lignin removal was defined as a function of time. The samples were observed prior to and after treatment under SEM. The treated biomass (78.3%) was subjected to enzymatic digestion with immobilized cellulase (Cellic CTec2) and fermentation was accomplished with the same (68.3%) to produce bioethanol (81.3%).