Equilibrium modeling of raw and torrefied leucaena in a downdraft fixed bed gasifier
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Published:
Jul 10, 2018
Keywords:
Torrefaction Gasification Syngas Thermodynamic equilibrium Leucaena
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Abstract
The gasification performance of raw Leucaena, torrefied Leucaena at 200 °C (T200), and torrefied Leucaena at 275 °C (T275) in a downdraft fixed bed gasifier are performed based on thermodynamic equilibrium model using STANJAN (v.3.93L). The effects of torrefaction temperature and gasification temperature on syngas contents (H2, CO, CH4), syngas heating value, cold gas efficiency (CGE) and carbon conversion (CC) were studied. The results showed the torrefied biomass leads to lower syngas yield. The syngas heating value of T275 is much higher than those of raw and T200 but it has the lowest CGE among the three fuels due to its heating value. The gasification temperature does not affect the gasification performance. In this study, the optimal torrefaction temperature and gasification temperature are 200 °C and 800 °C respectively.
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How to Cite
Manatura, K., & Jau-Huai, L. (2018). Equilibrium modeling of raw and torrefied leucaena in a downdraft fixed bed gasifier. Journal of Research and Applications in Mechanical Engineering, 5(2), 74–81. Retrieved from https://ph01.tci-thaijo.org/index.php/jrame/article/view/133627
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RESEARCH ARTICLES
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References
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[6] Wu, K.-T., Tsai, C.-J., Chen, C.-S. and Chen H.-W. The characteristics of torrefied microalgae. Appl. energy, Vol. 100, 2012, pp. 52-57.
[7] Repellin, V., Govin, A., Rolland and Guyonnet, R. Energy requirement for fine grinding of torrefied wood. Biomass Bioenerg., Vol. 34(7), 2010, pp. 923-930.
[8] Couhert, C., Salvador, S. and Commandre, J.-M. Impact of torrefaction on syngas production from wood. Fuel, Vol.88 (11), 2009, pp. 2286-2290.
[9] Chen, W.-H., Chen, C.-J., Hung, C.-I., Shen C.-H. and Hsu, H.-W. A comparison of gasification phenomena among raw biomass, torrefied biomass and coal in an entrained-flow reactor, Appl. energy, Vol. 112, 2013, pp. 421-430.
[10] Kuo, P.-C., Wu, W. and Chen W.-H. Gasification performances of raw and torrefied biomass in a downdraft fixed bed gasifier using thermodynamic analysis, Fuel, Vol. 117, 2014, pp. 1231-1241.
[11] Levenspiel, O. and Levenspiel, C. Chemical reaction engineering, Vol. 2, 1972, Wiley, New York.
[12] Adnan, M.A. and Hossain, M.M. Gasification of various biomasses including microalgae using CO2 – A thermodynamic study, Renewable Energy, Vol. 119, 2018 pp. 598-607.
[13] Adnan, M.A., Susanto, H., Binous, H. Muraza, O. and Hosain M.M. Feed compositions and gasification potential of several biomasses including a microalgae: A thermodynamic modeling approach. International Journal of Hydrogen Energy, Vol. 42(27), 2017, pp. 17009-17019.
[14] Xue, G., Kwapinska M., Horvat A., Kwapinski W., Rabou L.P.L.M., Dooley S., Czajka, K.M. and Leahy J.J. Gasification of torrefied Miscanthus×giganteus in an air-blown bubbling fluidized bed gasifier. Bioresource Technology, Vol. 159, 2014, pp. 397-403.
[15] Reynolds, W., Stanjan interactive computer programs for Chemkin equilibrium analysis, 1981.
[16] Wannapeera, J., Fungtammasan, B. and Worasuwannarak, N. Effects of temperature and holding time during torrefaction on the pyrolysis behaviors of woody biomass, J. Anal. Appl. Pyrol., Vol. 92(1), 2011, pp. 99-105.
[17] Lv, P., Xiong, Z.H., Chang, J., Wu, C.Z., Chen, Y. and Zhu J.X. An experimental study on biomass air–steam gasification in a fluidized bed, Bioresouece Technol., Vol. 95(1), 2004, pp. 95-101.
[18] Jayah, T.H., Aye, L., Fuller R.J. and Stewart, D.F. Computer simulation of a downdraft wood gasifier for tea drying. Biomass Bioenerg., Vol. 25(4), 2003, pp. 459-469.
[19] Narvaez, I., Orio, A., Aznar, M.P. and Corella, J. Biomass gasification with air in an atmospheric bubbling fluidized bed. Effect of six operational variables on the quality of the produced raw gas, Ind. Eng. Chem. Res., Vol. 35(7), 1996 pp. 2110-2120.
[20] Pinto, F., Franco, C. André, R.N., Miranda, M., Gulyurtlu, I. and Cabrita, I. Co-gasification study of biomass mixed with plastic wastes, Fuel, Vol. 81(3), 2002, pp. 291-297.