The effect of various heating rate and final temperature towards heating value and activation energy on rice husk pyrolysis

Abstract

Rice husk was residual waste which had content such other biomass, however it was still classified low in utilizing, thus it was needed efforts to improve the using values from the rice, the one of those was pyrolysis process The determination of kinetic parameter was also studied to get the proper conditions where the pyrolysis became easier to occur. The heating rate variations of pyrolysis were 10°C/min, 30°C/min and 60°C/min while the final temperatures were 350°C, 450°C, 500°C and 600°C. The highest heating value of the char product was obtained with 3348.78 cal/g at the final temperature of 550°C and heating rate of 30°C/minute. The highest activation energy was shown at the final temperature of 550°C and heating rate of 60°C/minute. However, as heating value of char product was still under National Indonesian Standard minimal 5000.00 cal/g, thus char was not suitable to be used as an alternative fuel. Conversely, the tar produced has the highest heating value obtained which reached 7340.53 cal/g therefore tar of rice husk was more suitable to be utilized as bio oil.