The usage of carbon dioxide gas on pyrolysis process and its effect on biomass catalytic conversion

Abstract

Several advantages of the usage of CO2 gas in pyrolysis theoretically could be the role for thermal efficiency, elimination oxygenated group, deep decomposition of biomass. The aim of this study was the use carbon dioxide as carrier gas and its effect on the catalytic product distribution from the rice husk type biomass. The Nickel/Alumina catalyst was prepared by impregnation method and calcination process of the Ni(NO3)2. 6H2O and Al2O3 mixture. The characterization was also performed by XRD analysis and BET adsorption method. The XRD analysis confirm the high crystallinity of NiO and NiAl2O4 phase which is considered as the interaction result between the NiO particle and the surface of γ-Al2O3. But the result of BET method suggested that the blockage the pore mouth of catalyst support γ-Al2O3 which is more likely due to the excessive amount of NiO particles. The comparison of pyrolysis carrier gas between CO2 and N2 and the variation of the operating temperature were performed to determine the product distribution distinctions. The catalytic conversion was done under the temperature 450, 475, 500, and 525°C. Experimental results show that the variation of carrier gas of the pyrolysis process and the variation of operating temperatures resulted in a difference product distribution. The dominant compounds formed as the temperature increases were ketone and benzene compounds.