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Optical study of fuel particle properties in an entrained flow reactor
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Biofuels provide a renewable option with large global potential for replacement of non-renewable fossil fuels. Some of the developing systems for thermal conversion of solid biomass depend on small particles or powders for feeding and dispersion in the reactors. Powder gasification research and the high temperature and heating rates of a pulver flame can be simulated in lab scale. Simulations aim at formulating generic or case specific predictive models for fuel behavior considering conversion rates and ash reactions. Differences in behaviour can be attributed to differences in chemical composition, but also to physical particle properties such as density, porosity, shape and fractionation behaviour. In this study, an advanced high-speed camera intended for particle studies was evaluated for use in an entrained flow reactor with optical access. The ability to characterize properties such as changing aspect ratio, agglomeration or fragmentation tendency, speed and drag coefficient were measured by computational analysis of optical data, and correlated to previously proposed models. Impact of different milling methods on flow properties of spruce powder was investigated, but found insignificant.

Place, publisher, year, edition, pages
2013. , 42 p.
National Category
Engineering and Technology
URN: urn:nbn:se:umu:diva-81076OAI: diva2:652647
Subject / course
Educational program
Master of Science Programme in Energy Engineering
Available from: 2013-10-07 Created: 2013-10-01 Last updated: 2013-10-07Bibliographically approved

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Optical study of fuel particle properties in an entrained flow reactor(2691 kB)440 downloads
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