Yield and Characteristics of Tar Formed during Biomass Fluidised-Bed Gasification

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Author list: Wongayara, K.;Fukuda, S.

Publication year: 2013

Journal: Journal of Sustainable Energy and Environment (1906-4918)

Volume number: 4

Issue number: 4

Start page: 153

End page: 157

ISSN: 1906-4918

Abstract

In this study, the behavior of gasification tar formed was investigated in a 100 kWth bubbling fluidized-bed gasifier using rubber woodchip as fuel. Tar yield and characteristics as well as the composition of product gas were monitored and correlated with respective gas residence time, which were varied by means of gas sampling at different positions, i.e. four along the height of the gasifier and one after the cyclone. At selected experimental condition (ER=0.33), the significant concentrations of CO and H2 were formed at 4.8 s, after which the increased concentrations of CO and H2 at longer residence times may be attributed to the tar reforming reactions and thermal cracking. The total gravimetric tar increased from 4.5 to 10.5 g

Keywords

Tar, Biomass gasification, Bubbling fluidised-bed gasifier, Residence time