Optimization of Bio-oil Production from Treated Rice Husk: A Study on Temperature and Particle Size Variation

This study explores the optimization of Bio-oil production from rice husk by varying particle sizes, pyrolysis temperatures, and pre-treatment methods. The experiments focused on enhancing Bio-oil yield and quality, utilizing rice husk–a widely available agricultural residue with high lignocellulosic content. Experiments were conducted at temperatures ranging from 300°C to 550°C, with a heating rate of 4°C/min and a retention time of 30 minutes. The rice husk was separated into different particle sizes (150 μm, 300 μm, and 600 μm) to evaluate the effect of particle size on Bio-oil yield and quality. The methodology involved proximate, ultimate, and sieve analyses, with pre-treatments including composting, acid hydrolysis, and alkaline hydrolysis to enhance lignocellulosic breakdown. The results revealed that smaller particle sizes (150 μm) significantly increased Bio-oil yield due to better heat transfer and surface area exposure. The highest Bio-oil production occurred at 550°C, with the 150 μm particles yielding approximately 12% more Bio-oil than larger particles. Pretreatment methods also played a critical role; composted rice husk consistently showed the highest Bio-oil yields, while alkaline hydrolysis led to decreased yields, particularly in larger particle sizes. This study demonstrates the importance of optimizing pyrolysis conditions, particle size, and pre-treatment methods to enhance Bio-oil production from rice husk. The findings contribute valuable insights for developing more efficient Bio-oil production processes, aligning with global sustainability goals. The presentation also discusses energy efficiency, emissions control, and potential integration with other bioenergy processes.