EFFECT OF COCONUT SHELL POWDER TO SCRAP TIRE RATIO ON BIO-OIL YIELD AND CHARACTERISTICS USING MICROWAVE PYROLYSIS TECHNOLOGY

Abstrak

The global energy crisis urges the development of alternative energy sources, including biomass. This study evaluates the effect of varying ratios of coconut shell powder and waste tire rubber on the yield and characteristics of bio-oil through co-pyrolysis using microwave technology. Pyrolysis was conducted at 450 °C with five different material ratios. Analyses included density, pH, and chemical composition of bio-oil using GC-MS. Results show that increasing the proportion of coconut shell enhances the bio-oil yield, with lignin content playing a significant role. The 75% coconut shell and 25% tire rubber mixture produced the most balanced bio-oil, with a density of 1.0482 g/cm³, pH of 5.8, and favorable chemical constituents supporting energy potential and stability. This research confirms the potential of utilizing biomass and tire waste as renewable energy sources with promising efficiency and product characteristics. Keywords: co-pyrolysis, bio-oil, coconut shell, tire rubber, microwave pyrolysis, GC-MS