Abstract

AbstractHydrolysis of pretreated waste jute fiber was intensified for maximizing reducing sugar (RS) yield deploying a novel reactor equipped with ultrasonic–far‐infrared‐waves (US–FIRW). At optimal 70°C temperature, 2.5 wt% Amberlyst‐15 catalyst concentration, 15 min hydrolysis time and 10 (wt/wt) water loading; US–FIRW rendered significantly greater RS yield (74.82 mol%) compared to other reactors provided with far‐infrared‐wave (69.63 mol%), ultrasonication (50.34 mol%), and conventional thermal system (48.16 mol%). Kinetic models were developed considering noncatalytic‐pseudo‐homogenous (NCPH) in addition to the combined catalytic‐pseudo‐homogeneous (CPH) and catalytic heterogeneous (CHE) hydrolysis pathways. The results revealed that pseudo‐homogenous–heterogeneous Eley–Rideal (PHHER) model could represent the hydrolysis kinetics most accurately. Remarkably, the lowest activation energy [16.75 kJ mol−1 (NCPH), 13.82 kJ mol−1 (CPH), 40.01 kJ mol−1 (CHE)] required in US–FIRW evidently established its greater energy‐efficiency among investigated reactors. The novel reactor and the simulated kinetic models can be applicable to other lignocellulosic biomass conversion for sustainable biorefinery.

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