Preliminary studies of lignocellulosics and waste fuels for fixed bed gasification
This study was carried out to understand the decomposition behaviour of a range of biofuel and waste feedstock during gasification in a downdraft gasifier. A laboratory scale large sample thermogravimetric analyser (LSTA) is used which allows the data on burn-out characteristics of different fuel particles to be measured under agitated conditions. The conditions chosen simulate the combustion behaviour in a gasifier for a range of biofuels and wastes, namely hazelnut, pistachio, and peanut shells, wood chips and sewage sludge pellets. From this data the activation energy is calculated for a heating rate of 20°C/min. It was found that, as the weight loss increases, the activation energy decreases. In addition, the influence of a range of gasification air/N <SUB align="right"><SMALL>2</SMALL></SUB> levels on constituents of the gas released during hazelnut shell decomposition was observed. It was found that the composition of the product gases consisted of CH<SUB align="right"><SMALL>4</SMALL></SUB>, H<SUB align="right"><SMALL>2</SMALL></SUB>, CO, CO<SUB align="right"><SMALL>2</SMALL></SUB>, C<SUB align="right"><SMALL>2</SMALL></SUB>H <SUB align="right"><SMALL>4</SMALL></SUB>, C<SUB align="right"><SMALL>2</SMALL></SUB>H<SUB align="right"><SMALL>6</SMALL></SUB>. This was analysed as function of time for hazelnut shells showing that the primary products are H<SUB align="right"><SMALL>2</SMALL></SUB>, CO, CH<SUB align="right"><SMALL>4</SMALL></SUB> and CO<SUB align="right"><SMALL>2</SMALL></SUB>.
Year of publication: |
2001
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Authors: | Hayati Olgun, Murat Dogru, Colin R. Howarth, Abdullah A. Malik |
Published in: |
International Journal of Global Energy Issues. - Inderscience Enterprises Ltd, ISSN 0954-7118. - Vol. 15.2001, 3/4, p. 264-280
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Publisher: |
Inderscience Enterprises Ltd |
Subject: | gasification | lignocellulosic | bio-waste | thermochemical | pyrolysis |
Saved in:
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