Studies on Gasification of Coir Pith

S. A. Ramjani; A. Sampathrajan

doi:10.52151/jae2007442.1254

Authors

S. A. Ramjani Assistant Professor, Dept. of Agricultural Engineering. AC & RI, TNAU, Madurai 625104 Author
A. Sampathrajan Dean. AEC & RI, TNAU. Coimbatore 641003 Author

DOI:

https://doi.org/10.52151/jae2007442.1254

Abstract

Coir pith is considered as an undesirable waste of coir industries. It is difficult to burn coir pith in normal atmospheric conditions. It decomposes slowly, taking 8-10 years for complete decomposition due to higher lignin content of 37 to 45%. Being dust, it is easily blown by wind. When ignited, it does not burn completely and emits continuous smoke for several days polluting the environment. Therefore, the study was conducted to produce combustible gas from coir pith through fluidized bed gasification process. A fluidized bed gasifier was developed. Coir pith of0.511 mm mean particle size was used as feed material. Thermogravimetric studies were also conducted to determine the combustion behaviour of coir pith. Thermograms obtained for raw coir pith revealed distinct stages of thermal degradation and the ignition temperature was found to be 550°C. Minimum fluidizing velocity of 0.1 m/s was adopted for sand bed. A general trend of increasing gas yield with increasing air factor and slightly decreasing trend of calorific value were noticed. The average gas composition was found to be 2.3 to 6.5%, 9.1 to 16.2% and 6.4 to 20.5% for CH4, Hz, and CO, respectively. The combustible gas was well burnt in a low calorific burner, which will fulfill the thermal needs, or the combustible gas can be used in the dual fuel engine to produce mechanical power or electricity. The average calorific value of the gas was found to be 4.23 MJ/m³

References

Beck 8 R; Wang M J; Hightower J A. 1981. Gasification of Oak saw dust, Mesquite, Corn Stover, and Cotton gin trash in a countercurrent fluidized bed pilot reactor. American Chemical Society. 144 (177), 335-349.

Czernik 8; Koeberle P.G; Jollez P; Bilodeau J F; Chornet E. 1993. Gasification of residual biomass via the biosyn fluidized bed technology. In: Advances in Thermo chemical Biomass Conversion (Ed. Bridgewater AV). B1ackie Academic and Professional, London.

Dan T K. 1992. Development of light weight building bricks using coconut pith. Research and Industry, 37(1), 11-17.

Hartiniati A; Soemardjo; Yauvial M. 1989.

Performance of pilot scale fluidized bed gasifier fueled by rice husks. Proceedings of International Conference on Pyrolysis and Gasification held in Luxumberg. (Ed. Fertero, K.Maniatis, A. Bukens and A.V. Bridgewater), Elsevier Applied Science Pub., London.

Hoveland D A; Walawender W P; Fan L T; Lai F 8.1982. Steam gasification of grain dust in a fluidized bed reactor. Trans. A8AE, 1076-1080.

Jayatilleke C L V; Kulasiri G D. 1983. Combustible gas from the coconut. Renewable Energy Resources Information Centre News, Asian Institute of Technology, Bangkok.

Kunii D; Levenspiel O. 1969. Fluidization Engineering. John Wiley and Sons Inc., London.

Kamaraj C M. 1993. Use of coir pith as peat in commercial line and export opportunities. Paper presented in International Workshop on utilization of coir pith. Coir Board, Govt. of India, Cochin, Kerala.

Miura M; Niikawa K; Swzuki S; Arider VP; Gonzales A L; Atienza D G; Pugal D L; Isaac D B; 8uavillo E A; Pondevida J L. 1989. Gasification of cellulosic wastes for power generation. J. Fuel Soc. Japan, 68(9), 823-830.

Natarajan G. 1995. Commercial exploitation of coconut pith- Problems and prospects. Indian Coconut J., February, 9-11.

Schans. 1987. Development of industrial gas burner for the utilization of low calorific value gases produced by biomass and waste utilization process. In: Energy from biomass wastes X. (Ed. D. L. Klass). Elsevier Applied Science Pub. and IGT Chicago.

Waters P L; Bowling K McG. 1978. Coal Pyrolysis, Gasifica-tion and combustion in a multi vessel fluidized bed system. Fluidization, Cambridge University Press.