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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 13, 2005
Accepted February 16, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Gasification characteristics of combustible wastes in a 5 ton/day fixed bed gasifier

See Hoon Lee^† Kyong Bin Choi¹ Jae Goo Lee Jae Ho Kim

Thermal Process Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yusung-gu, Daejeon 305-343, Korea ¹Combustion System Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yusung-gu, Daejeon 305-343, Korea

donald@kier.re.kr

Korean Journal of Chemical Engineering, July 2006, 23(4), 576-580(5), 10.1007/BF02706797

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Abstract

The gasification characteristics of combustible wastes were determined in a 5 ton/day fixed bed gasifier (1.2 m I.D. and 2.8m high). The fixed bed gasifier consisted of air compressor, oxygen tank, MFC, fixed bed gasifier, cyclone, heat exchanger, solid/gas separator, water fluidized bed reactor and blower. To capture soot or unburned carbon from the gasification reaction, solid/gas separator and water fluidized bed were used. The experiments with 10-50 hours of operation were carried out to determine the effects of bed temperature, solid/oxygen ratio and oxidant on the gas composition, calorific value and carbon conversion. The calorific values of the produced gas decreased with an increase of bed temperature because combustion reaction happened more actively. The gas composition of partial oxidation of woodchip is CO: 34.4%, H2: 10.7%, CH4: 6.0%, CO2: 48.9% and that of RPF is CO: 33.9%, H2: 26.1%, CH4: 10.7%, CO2: 29.2%. The average calorific values of produced gas were about 1,933 kcal/Nm3, 2,863 kcal/Nm3, respectively. The maximum calorific values were 3,100 kcal/Nm3 at RPF/oxygen ratio: 7.

Keywords

Combustible Waste Gasification Fixed Bed Syngas

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