Analysis of the Effect of the Mass Ratio of Mixed Fuel Rice Husk-Betung Bamboo Biopellets in A Biomass Gasification Stove

The utilization of biomass energy presents a promising solution to address the global energy crisis and mitigate greenhouse gas emissions. This study analyzes the effect of the mass ratio of rice husk and Betung bamboo bio-pellet blends on the performance of a Top-Lit Up Draft (TLUD) biomass gasification stove. Performance parameters observed include thermal efficiency, combustion temperature, flame duration, boiling time, specific fuel consumption, and CO and CO₂ emissions. The methodology involved the Water Boiling Test (WBT) for thermal performance assessment, along with proximate and ultimate analyses to characterize the fuel. The fuel compositions tested were 100% rice husk, 75% rice husk and 25% Betung bamboo, 50% rice husk and 50% Betung bamboo, 25% rice husk and 75% Betung bamboo, and 100% Betung bamboo. Results indicate that the blend of 75% rice husk and 25% Betung bamboo yielded the best performance, achieving a thermal efficiency of 61.10%, a combustion temperature of 728°C, a flame duration of 65.21 minutes, a boiling time of 732 seconds, the lowest CO emission of 23 ppm, CO₂ emission of 388 ppm, and a specific fuel consumption of 0.30 kg/hour. This composition is optimal because the high volatile matter content in rice husk accelerates gasification, while the stable fixed carbon in Betung bamboo supports sustained combustion.