Bio-Oil Production by Pyrolysis of Oil Palm Empty Fruit Bunch in Nitrogen and Steam Atmospheres
- 1 Department of Chemical Technology, Chulalongkorn University, Bangkok, Thailand
- 2 Department of Chemical Technology, Chulalongkorn University, Bangkok, Thailand
- 3 Department of Chemical Technology, Chulalongkorn University, Bangkok, Thailand
Abstract
This work investigated the bio-oil production from oil palm empty fruit bunch (EFB) by continuous pyrolysis reactor under nitrogen and steam atmospheres as sweeping gas. The study parameters were particle size, biomass feeding rate, reactor temperature, and reactor sweeping gas. The EFB particle ranges were below 500 micrometers, between 500 - 1180 micrometers and 1180 - 2230 micrometers. Feeding rates were 150, 350, and 550 rpm. Both factors were analyzed by single factor ANOVA. Additionally, Box-Behnken design was used to investigate temperature (350 o C - 600 o C) under the following nitrogen and steam flow rates as sweeping gas: 0, 100, and 200 cm 3 /min of nitrogen and 0, 9, and 18 cm 3 /min of steam. The mathematical model from Box-Behnken design succeeded in predicting the optimal conditions for normal and nitrogen atmospheres. A particle size below 1180 μm was determined to be optimal for bio-oil production. In a normal atmosphere or no sweeping gas, the condition was 475 o C and 450 rpm of feed rate. The optimal condition for nitrogen atmosphere was 530 o C, 450 rpm of feed rate, and 200 cm 3 /min of nitrogen flow rate. However, steam as sweeping gas caused high uncertainty and the model was unable to predict the optimal conditions accurately. The biooils from normal, nitrogen, steam, and mixed atmospheres were analyzed for general characteristics. NMR and GC-MS were used to analyze chemical compositions in the bio-oils. Relationships between physical and chemical characteristics were determined and discussed.
- Department of Agricultural Extension, “Information on Palm Oil,” 2010. http://www.doae.go.th/plant/palm.htm
- “Executive Summary—Oil Palm,” 2010. http://www.kasetcity.com/Thaibioenergy/Plam/QAview.asp?id=15
- M. S. Umikalsom, et al., “The Treatment of Oil Palm Empty Fruit Bunch Fibre for Subsequent Use as Substrate for Cellulase Production by Chaetomium Globosum Kunze,” Bioresource Technology, Vol. 62, No. 1-2, 1997, pp. 1-9. doi:10.1016/S0960-8524(97)00132-6
- S. H. A. Rahman, J. P. Choudhury and A. L. Ahmad, “Production of Xylose from Oil Palm Empty Fruit Bunch Fiber Using Sulfuric Acid,” Biochemical Engineering Journal, 2006. Vol. 30, No. 1, pp. 97-103. doi:10.1016/j.bej.2006.02.009
- D. Mohan, C. U. Pittman and P. H. Steele, “Pyrolysis of Wood/Biomass for Bio-Oil: A Critical Review,” Energy & Fuels, Vol. 20, No. 3, 2006, pp. 848-889. doi:10.1021/ef0502397
- N. ?zbay, et al., “Biocrude from Biomass: Pyrolysis of Cottonseed Cake,” Renewable Energy, Vol. 24, No. 3-4, 2001, pp. 615-625. doi:10.1016/S0960-1481(01)00048-9
- A. E. Pütün, E. ApaydIn and E. Pütün, “Rice Straw as a Bio-Oil Source via Pyrolysis and Steam Pyrolysis,” Energy, Vol. 29, No. 12-15, 2004, pp. 2171-2180. doi:10.1016/j.energy.2004.03.020
- F. Sulaiman and N. Abdullah, “Optimum Conditions for Maximising Pyrolysis Liquids of Oil Palm Empty Fruit Bunches,” Energy, Vol. 36, No. 5, 2011, pp. 2352-2359. doi:10.1016/j.energy.2010.12.067
- D. C. Montgomery, “Design and Analysis of Experiments,” 6th Edition, John Wiley & Sons, Hoboken, 2004.
- National Institute of Standards and Technology, “The Three-Factor Box-Behnken Design was for Temperature, Nitrogen, and Steam Volumetric Flow Rate,” NIST/ SEMATECH e-Handbook of Statistical Methods, 2012. http://www.itl.nist.gov/div898/handbook/
- W. T. Tsai, M. K. Lee and Y. M. Chang, “Fast Pyrolysis of Rice Straw, Sugarcane Bagasse and Coconut Shell in an Induction-Heating Reactor,” Journal of Analytical and Applied Pyrolysis, Vol. 76, No. 1-2, 2006, pp. 230-237. doi:10.1016/j.jaap.2005.11.007
- F. Abnisa, et al., “Utilization Possibilities of Palm Shell as a Source of Biomass Energy in Malaysia by Producing Bio-Oil in Pyrolysis Process,” Biomass and Bioenergy, Vol. 35, No. 5, 2011, pp. 1863-1872. doi:10.1016/j.biombioe.2011.01.033
- H. Park, et al., “Pyrolysis Characteristics of Oriental White Oak: Kinetic Study and Fast Pyrolysis in a Fluidized Bed with an Improved Reaction System,” Fuel Processing Technology, Vol. 90, No. 2, 2009, pp. 186-195. doi:10.1016/j.fuproc.2008.08.017