Upgrading of Bio-oil from Energy Crops via Fast Pyrolysis using Nanocatalyst in a Bubbling Fluidized Bed Reactor

Jutaporn Chanathaworn, Chokchai Yatongchai


The aim of this research is to evaluate the catalytic efficiency of TiO2 nanocatalyst in fast pyrolysis. Leucaena leucocephala was used as the feedstock pyrolyzed in the presence of TiO2 catalyst in a bubbling fluidized bed reactor. The influence of pyrolysis temperature, catalytic zone temperature and TiO2 catalyst to biomass (T/W) ratio on bio-oil production was evaluated. The structure and surface chemistry of TiO2 catalyst were characterized by various analytical techniques. The characteristics and composition of the biomass were also investigated. In the absence of the catalyst, the maximum bio-oil yield of 54.21% was achieved at a pyrolysis temperature of 500°C. Regarding the influence of catalytic zone temperature, pyrolysis at 600°C using the T/W ratio of 1:1 resulted in an upgraded bio-oil product the yield of which was 59.98%. The obtained bio-oil contained 27.1% oxygen content with the HHV of 29.1 MJ/kg, indicating the TiO2 catalyst could enhance the yield of bio-oil, accompanied by a decrease in gas generation. Moreover, in this study, the maximum yield 67.1% was obtained using 3:1 T/W ratio. The obtained bio-oil consisted of oxygen content 24.5% and generated the highest HHV of 31.5 MJ/kg. Thus, the TiO2 catalyst had a potential for improving production efficiency of bio-oil product.


Bio-oil; Catalyst; Fast pyrolysis; Nanocatalyst; Oxygen content

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Johnsson F., Kjärstad J., and Rootzén J., 2019. The threat to climate change mitigation posed by the abundance of fossil fuels. Climate Policy 19(2): 258-274.

Anderson T.R., Hawkins E., and Jones P.D., 2016. CO2, the greenhouse effect and global warming: from the pioneering work of Arrhenius and Callendar to today's Earth System Models. Endeavour 40(3): 178-187.

Patricia T., Paul G., Simon S., and Jim H., 2015. Maximizing the greenhouse gas reductions from biomass: The role of life cycle assessment. Biomass and Bioenergy 81: 35-43.

Michael B., Jeffrey C., Akasaka H., and Naoto O., 2017. A study of guaiacol, cellulose, and Hinoki wood pyrolysis with silica, ZrO2&TiO2 and ZSM-5 catalysts. Journal of Analytical and Applied Pyrolysis 125: 178-184.

Bridgwater A.V., 2012. Review of fast pyrolysis of biomass and product upgrading. Biomass and Bioenergy 38: 68-94.

Ahorsu R., Medina F., and Constanti M., 2018. Significance and challenges of biomass as a suitable feedstock for bioenergy and biochemical production: a review. Energies 11(12): 1-19.

Qiang L., Zhi-boo Z., Xiao-qiang W., Chang-qing D., and Yong-qian L., 2014. Catalytic upgrading of biomass fast pyrolysis vapors using ordered mesoporous ZrO2, TiO2 and SiO2. Energy Procedia 61: 1937-1941.

Makarfi Isa Y. and E.T. Ganda. 2018. Bio-oil as a potential source of petroleum range fuels. Renewable and Sustainable Energy Reviews 81: 69-75.

Daniel A.R., Joshua A.S., Jack R.F., Jun W., Luc M., and Jesse E.H., 2014. Recent advances in heterogeneous catalysts for bio-oil upgrading via ex situ catalytic fast pyrolysis: Catalyst development through the study of model compounds. Green Chemistry 16(2): 454- 490.

Hernando H., Fermoso J., Moreno I., Coronado J.M. Serrano D.P., and Pizarro P., 2017. Thermochemical valorization of camelina straw waste via fast pyrolysis. Biomass Conversion and Biorefinery 7(3): 277-287.

Chavan S.B., Uthappa A.R., Keerthika A., Parthiban K.T., Vennila S., Kumar P., Anbu P.V., Newaj R., and Sridhar K.B., 2015. Suitability of Leucaena leucocephala (Lam.) de Wit as a source of pulp and fuelwood in India. Journal of Tree Sciences 34: 30-38.

Priyanka P., Seyed A.M., and Jalal A., 2021. Fast pyrolysis of biomass in bubbling fluidized bed: a model study. Chemical Product and Process Modeling 6(1): 1545-1549.

Harizanov O., Ivanova T., and Harizanova A., 2001. Study of sol–gel TiO2 and TiO2–MnO obtained from a peptized solution. Materials Letters 49(3): 165-171.

Riyang S., Ying X., Pengru C., Long M., Qi Z., Lie Z., and Chenguang., 2017. Mild hydrogenation of lignin depolymerization products over Ni/SiO2 catalyst. Energy & Fuels 31(7): 7208-7213.

Xiaoquan W., Sascha R.A., Kersten P., and Wim P.M., 2005. Biomass pyrolysis in a fluidized bed reactor. Part 2: Experimental validation of model results. Industrial & Engineering Chemistry Research 44(23): 8786-8795.

Hernando H., Jimenez-Sanchez S., Fermoso J., Pizarro P., Coronado J.M., and Serrana D.P., 2016. Assessing biomass catalytic pyrolysis in terms of deoxygenation pathways and energy yields for the efficient production of advanced biofuels. Catalysis Science & Technology 6(8): 2829-2843.

Awan N., 2014. Effect of Temperature on the Bio Oil Yield from Pyrolysis of Maize Stalks in Fluidized Bed Reactor. Journal of Pakistan Institute of Chemical Engineers 42(2).

Yongsheng F., Yixi C., Xiaohua L., Ning Y., and Haiyun Y., 2014. Catalytic upgrading of pyrolytic vapors from the vacuum pyrolysis of rape straw over nanocrystalline HZSM-5 zeolite in a two stage fixed-bed reactor. Journal of Analytical and Applied Pyrolysis 108: 185-195.

Mortensen P.M., Grunwaldt J.D., Jensen P.A., Knudsen K.G., and Jensen A.D., 2011. A review of catalytic upgrading of bio-oil to engine fuels. Applied Catalysis A: General 407(1): 1-19.