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High temperature gasification of millimetric wood particles between 800°C and 1400°C

Septien Stringel, Santiago. High temperature gasification of millimetric wood particles between 800°C and 1400°C. PhD, Institut National Polytechnique de Toulouse, 2011

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Official URL: http://ethesis.inp-toulouse.fr/archive/00001862/

Abstract

Biomass gasification was studied in the conditions of an entrained flow reactor, namely at high heating rate and temperature. Experiments in a drop tube reactor were performed between 800°C and 1400°C, with wood particles of 0.35 mm and 0.80 mm size, under inert and steam containing - 25 mol% of H2O - atmospheres. These experiments were also simulated with a 1D model which gave good predictions. The collected solids, soot and char, were analyzed and characterized. This study highlights the importance of gas phase reactions on the yields of the final products, mainly gaseous compounds, in these conditions. These reactions are hydrocarbons cracking, reforming and polymerization, leading to soot formation, and water-gas shift. Char graphitization and deactivation were experimentally demonstrated. However, these phenomena have a negligible influence on char evolution in the drop tube reactor. Finally, the particle size was shown to have almost no influence on experimental results.

Item Type:PhD Thesis
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Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
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Research Director:
Salvador, Sylvain
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Deposited By: admin admin
Deposited On:21 Nov 2012 12:18

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