Abstract
This paper presents the results of a study on the production of hydrochar through hydrothermal carbonization of rice husk. Hydrothermal carbonization is an innovative and promising biomass processing method that yields a carbon-rich product with high calorific value and a wide range of applications. Rice husk, a byproduct of the rice industry, is often considered waste but holds significant potential as a feedstock for bioenergy materials. Experiments on hydrothermal carbonization of rice husk were conducted under various temperature conditions. The optimal process parameters were determined based on the yield and physicochemical properties of the final product. The formation of pores on the hydrochar surface depends on the duration and temperature of the process. Biomass undergoes significant decomposition at high temperatures, exposing its underlying layers and enhancing hydrochar porosity. The optimal hydrothermal carbonization temperature for rice husk was found to be 800°C with a duration of 60 minutes. The iodine adsorption capacity at 800°C reached 63.37%. Scanning electron microscopy revealed that the obtained hydrochar possesses a well-developed porous structure.