Behavior and role of alkali metals in biomass combustion

Saddawi, A. and Jones, J. M. and Williams, A. and Nowakowski, D. J. and Fuentes, M. E. (2010) Behavior and role of alkali metals in biomass combustion. In: bioten conference on biomass, bioenergy and biofuels, 21 - 23 September 2010, Birmingham, UK.

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Item Type:Conference or Workshop contribution (Presentation)
Item Status:Live Archive

Abstract

This paper details fundamental work on alkali metals (sodium, potassium, and cesium) to determine if group chemistry has an effect upon the catalytic process observed in SRC Willow thermal degradation, thereby gaining mechanistic insight into the process. Work detailing both pyrolysis and combustion (TGA), and combustion under flame conditions is presented. DTG profiles and first order reaction kinetics comparing the pyrolysis and combustion of the three alkali metal impregnated, raw, and demineralized samples revealed a strong and similar catalytic effect that all three alkali metals have on these reactions. Combustion under flame conditions again showed a stark contrast between the strongly catalyzed degradation of samples with alkali metal presence, and the uncatalyzed degradation of mineral-free samples. As with the low heating rate results, at flame conditions, no observable difference between samples impregnated with varous group 1 metals is noted. These findings imply that a similar thermal degredation mechanisim is followed when this woody biomass contains any alkali metals.

Additional Information:Proceedings of the Bioten Conference on Biomass Bioenergy and Biofuels 2010 Edited by A V Bridgwater CPL Press October 2011
Keywords:biomass, alkali metals, combustion
Subjects:H Engineering > H221 Energy Resources
H Engineering > H800 Chemical, Process and Energy Engineering
Divisions:College of Science > School of Engineering
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ID Code:11282
Deposited On:26 Jul 2013 12:59

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