Numerical Analysis on Wood Pyrolysis in Pre-Vacuum Chamber


In the previous experimental work, a new technology system for wood pyrolysis was developed to aim at mitigating climate change, global warming, and energy crisis as well as enhancing low electrification in rural areas in developing countries. The new technology system equipped with a pre-vacuum chamber requires low cost and less maintenance. However, large wood pyrolysis in the pre-vacuum chamber is rather complicated. To obtain a good understanding of the previous experimental results, a numerical analysis taking account of heat-mass transfer and chemical reaction is carried out. Two-step general reaction model is proposed for the numerical analysis. The first stage is volatile and char formation from the wood pieces and the second state is decomposition of the volatile to five species including vapor of tar. In this analysis, chemical formulae of the volatile and the tar are successfully identified hypothetically. The results obtained by this numerical analysis can explain the experimental results reasonably and provide useful information about time evolution of volatile formation, temperature change in pre-vacuum chamber with time, and species mole concentration decomposed from the volatile.

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Homma, H. , Homma, H. and Idris, M. (2014) Numerical Analysis on Wood Pyrolysis in Pre-Vacuum Chamber. Journal of Sustainable Bioenergy Systems, 4, 149-160. doi: 10.4236/jsbs.2014.43014.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] 19th Conference of the parties in Warsaw Poland, United Nations Convection Framework on Climate Change. 2013/session/7767.php
[2] World Energy Outlook Database 2013, International Energy Agency.
[3] Elliot, D.C. (2013) Objective of Task 34, IAE Bioenergy.
[4] Homma, H., Homma, H., Yusrizal and Idris, M. (2013) Wood Pyrolysis in Pre-Vacuum Chamber. Journal of Sustainable Bioenery Systems, 3, 243-249.
[5] Simmons, G.M. and Gentry, M. (1986) Particle Size Limitations Due to Heat Transfer in Determining Pyrolysis Kinetics of Biomass. Journal of Analytical and Applied Pyrolysis, 10, 117-127.
[6] Saastamoined, J.J. (2006) Simplified Model for Aclcutation of Devolatilization in Fluidized Beds. Fuel, 85, 2385-2395.
[7] Babu, B.V. and Chaurasia, A.S. (2003) Modeling for Pyrolysis of Solid Particle: Kinetics and Heat Transfer Effects. Energy Conversion and Management, 44, 2251-2275.
[8] Papadikis, K., Gu, S. and Bridgwater, A.V. (2010) Computational Modelling of the Impact of Particle Size to the Heat Transfer Coefficient between Biomass Particles and a Fluidized Bed. Fuel Processing Technology, 91, 68-79.
[9] Anca-Couce, A. and Zobel, N. (2012) Numerical Analysis of a Biomass Pyrolysis Particle Model: Solution Method Optimized for the Coupling to Reactor Models. Fuel, 97, 80-88.
[10] Wagenaar, B.M., Prins, W. and Swaaij, W.P.M. (1993) Flash Pyrolysis Kinetics of PINE Wood. Fuel Processing Technology, 36, 291-298.
[11] Chan, W.R., Kelbon, M. and Krieger, B.B. (1985) Modelling and Experimental Verification of Physical and Chemical Processes during Pyrolysis of a Large Biomass Particle. Fuel, 64, 1505-1513.
[12] Papadikis, K., Gu, S., Bridgwater, A.V. and Gerhauser, H. (2009) Application of CFD to Model Fast Pyrolysis of Biomass. Fuel Processing Technology, 90, 504-512.
[13] Papadikis, K., Gu, S. and Bridgwater, A.V. (2009) CFD Modelling of the Fast Pyrolysis of Biomass in Fluidised Bed Reactors, Part B: Heat, Momentum and Mass Transport in Bubbling Fluidised Beds. Chemical Engineering Science, 64, 1036-1045.
[14] Papadikis, K., Gu, S. and Bridgwater, A.V. (2010) A CFD Approach on the Effect of Particle Size on Char Entrainment Inn Bubbling Fluidised Bed Reactors. Biomass and Bioenery, 34, 21-29.
[15] Wang, Y. and Yan, L. (2008) CFD Studies on Biomass Thermochemical Conversion. International Journal of Molecular Sciences, 9, 1108-1130.
[16] Sinha, S., Jhalani, A., Ravi, M.R. and Ray, A. (2000) Modelling of Pyrolysis in Wood and Sawdust: A Review. Journal of Solar Energy Society of India, 10, 41-62.
[17] Prakash, N. and Karunanithi, T. (2009) Advances in Modeling and Simulation of Biomass Pyrolysis. Asian Journal of Science Research, 2, 1-27.
[18] Di Blasi, C. (2008) Modelling Chemical and Physical Processes of Wood and Biomass Pyrolysis. Progress in Energy and Combustion Science, 34, 47-90.
[19] Saliba, E.O.S., Rodriguez, M.M., Pilo-Veloso, D. and Morais, S.A.L. (2002) Chemical Characterization of the Lignins of Corn and Soybean Agriculture Residues. Arquivo Brasileiro de Modicina Veterinaria e Zootecnia, 54, 42-51.
[20] Alhasan, A.M., Kuang, D., Mohammad, A.B. and Sharma-Shivappa, R.T. (2010) Combined Effect of Nitric Acid and Sodium Hydroxide Pretreatment on Enzymatic Saccharification of Rubber Wood (Heavea brasiliensis). International Journal of Chemical Technology, 2, 12-20.
[21] Engel, P., Hein, L. and Spiess, A.C. (2012) Derivatization-Free Gel Permeation Chromatography Elucidates Enzymatic Hydrolysis. Biotechnology for Biofules, 5, 77.
[22] Reyes, P., Mendonca, R.T., Rodriguez, J., Fardim, P. and Vega, B. (2013) Characterization of the Hemicellulosic Fraction Obtained after Pre-Hydrolysis of Penus Radiate Wood Chips with Hot-Water at Different Initial pH. Journal of the Chilean Chemical Society, 58, 1614-1618.
[23] Guerra, A., Gaspar, A.R., Contreras, S., Lucia, L.A., Crestini, C. and Argyropoulos, D.S. (2007) On the Propensity of Lignin to Associate: A Size Exclusion Chromatography Study with Lignin Derivatives Isolated from Different Plant Species. Phytochemistry, 68, 2570-2583.
[24] Guerra, A., Filpponen, I., Lucia, L.A. and Saquing, C. (2006) Toward a Better Understanding of the Lignin Isolation Process from Wood. Journal of Agriculture and Food Chemistry, 54, 5939-5947.
[25] Jin, W., Singh, K. and Zondlo, J. (2013) Pyrolysis Kinetics of Physical Components of Wood and Wood Polymers Using Isoconversion Method. Agriculture, 3, 12-32.
[26] Hernelind, M. and Gevert, B. (2002) Hydrotreatment of Tar Formed in Gasification of Biomass. American Chemical Society, 47, 171-172.
[27] Lv, G. Wu, S. and Lou, R. (2010) Characteristics of Corn Stalk Hemicellulose Pyrolysis in a Tubular Reactor. BioResources, 5, 2051-2062.
[28] Lopez, F.A., Rodriguez, O., Urien, A., Lobato, B., Centeno, T.A. and Alguacil, F.J. (2013) Physico-Chemical Characteristics of the Products Derived from the Thermolysis of Waste Abies Alba Mill Wood. Journal of Environmental Protection, 4, 26-30.
[29] Milne, T.A., Evans, R.J. and Abatzoglou, N. (1998) Biomass Gasifier “Tars”: Their Nature, Formation, and Conversion. NREL/TP 570-25357, 1-68.
[30] Park, W.C. (2008) A Study of Pyrolysis of Charring Material and Its Application for Fire Safety and Biomass Utilization. Ph.D. Thesis, The University of Michigan, Ann Arbor, 90-106.
[31] Park, W.C., Atreya, A. and Baum, H.R. (2010) Experimental and Theoretical Investigation of Heat and Mass Transfer Processes during Wood Pyrolysis. Combustion and Flame, 157, 481-494.
[32] Haseli, Y., van Oijen, J.A. and de Goey, L.P.H. (2011) Modeling Biomass Particle Pyrolysis with Temperature-Dependent Heat of Reactions. Journal of Analytical and Applied Pyrolysis, 90, 140-154.

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