The Chemical Composition and Physical Properties of the Light and Heavy Tar Resulted from Coconut Shell Pyrolysis
Uswatun Hasanah, Bambang Setiaji, Triyono Triyono, Chairil Anwar
J. Pure App. Chem. Res. Vol 1, No 1 (2012), pp. 26-32
Submitted: October 02, 2012     Accepted: October 02, 2012     Published: December 01, 2012


The tar resulted from pyrolysis of coconut shell is a waste. It is important to be clarified their chemical composition and physical properties in order to find out their feasibility as source of a fuel. This research was resulted two immiscible organic fractions, and these were further determined their physical properties such as water composition by using ASTM D-95 methods, ash composition (ASTM D-482), flash point C.O.C (ASTM D-92), kinematics of viscosity (ASTM D-445), and caloric valued using bomb calorimetric. In addition, tar composition was determined by gas chromatography-mass spectrometry (GCMS). The result provided oil which was categorized as light and heavy bio-oils. The light bio-oil has specific gravity 0.99, ash content 0.01%, kinematics viscosity 25.5 cSt, flash point <27 oC, pH 3 and heating value 10304 kcal/kg. On the other hand, heavy bio- oils gave specific gravity 1.13, ash 0.46%, kinematics viscosity 185 cSt, flash point 134 oC, pH 2.5 and heating value 6210 kcal/kg. Moreover, the light bio-oil contained 79 compounds which was composed of phenol 16.4%, hydrocarbon 12.4%, phenolic 27.6%, other oxygenated compounds 53.6%, and acetic acid 3%, meanwhile the heavy bio-oils contained of 18 compounds which was consisted of phenol 31.2%, lauric acid 6.0%, phenolic 27.6%, and other oxygenated compounds 35.3%, respectively. With this result, it was clarify that these bio-oils could not be used directly as a fuel for motor nor diesel machinery.

Keywords : tar composition, physical properties of fuel, coconut shell, pyrolysis
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[1] Mohan, Dinesh, Charles U. Pittman, Jr., and Philip H. Steele, Energ. Fuel., 2006, 20, 848-889

[2] Cagnon Benoît, Xavier Py, André Guillot, Fritz Stoeckli, and Gérard Chambat, Bioresource Technol., 2009, 100 (1), 292-298.

[3] Ganapathy Sundaram E. and E. Natarajan, J. Eng. Res., 2009, 6 (2), 33-39

[4] Oasmaa, A. and C. Peacocke, A Guide to Physical Property: Characterisation of Biomass derived Fast Pyrolysis Liquids, VTT Publications, Technical Research Centre of Finland, 2001, 7-12

[5] Keputusan Direktur Jenderal Minyak dan Gas Bumi Nomor14496&'14/D..IM 2008 Tanggal 21 Agustus 2008, STANDAR DAN MUTU (SPESIFIKASI) BAHAN BAKAR

[6] Tsamba, A.J., Weihong Yang, and Wlodzimierz Blasiak, Fuel Process. Technol., 2006, 87, 523–530

[7] Oasmaa, A. and Czernik, S., Energ. Fuel., 1999, 13, 914-921

8] Diebold, J.P. & Bridgwater, A.V., Overview of Fast Pyrolisis of Biomass for The Production of Liquid Fuels in Bridgwater, A.V. & Boocock, D. G. B. (eds.). Developments in Thermochemical Biomass Conversion. London: Blackie Academic & professional. 1997, 5-26

[9] Oasmaa, A. and Cordner Peacocke, Properties and Fuel Use of Biomass Derived Fast Pyrolysis Liquids, A guide, VTT Publications, 2010, 731.


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