Optimization of activated carbon production from cajuput biomass as a desiccant

Abstract Effective food preservation methods encompass a range of approaches, among which drying stands out for its convenience in storage and distribution. The drying process and subsequent storage of food, however, are significantly influenced by environmental conditions. To address this, the utilization of activated carbon derived from renewable biomass sources emerges as a sustainable solution for moisture sorption applications. This research delves into optimizing the production of activated carbon from cajuput biomass, harnessing its exceptional desiccant properties through the Taguchi method. The study rigorously investigates crucial parameters, namely carbonization temperature (400, 600, 800 °C), carbonization time (1, 2, 3 hours), NaOH concentration (1, 2, 3%), and impregnation time (1, 2, 3 hours). Employing a two-step approach involving carbonization followed by chemical activation with NaOH, the impact of these variables on the activated carbon’s moisture adsorption capacity is comprehensively evaluated. Remarkably, the optimized conditions of carbonization temperature at 400 °C, carbonization time of 3 hours, NaOH concentration of 3%, and impregnation time of 3 hours yield a maximum moisture adsorption capacity of 0.4076 g/g. These findings emphasize the transformative potential of cajuput biomass as a valuable feedstock for producing activated carbon, endowed with remarkable moisture sorption attributes. This cajuput-derived activated carbon presents an alternative desiccant for efficient moisture adsorption in the food drying process and optimal moisture control during food product storage.