Influence of the geometry on the riser gas holdup in an external-loop airlift reactor: empirical and neural network modelling
Experimental studies on the effect of geometrical characteristics (restriction orifice free area and sparger configuration) on the riser gas holdup of an external-loop airlift reactor have been conducted in this paper. The impact of the addition of non-coalescing media, such as n-butanol...
Main Authors: | , |
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Format: | Article |
Language: | English |
Published: |
Faculty of Technology, Novi Sad
2018-01-01
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Series: | Acta Periodica Technologica |
Subjects: | |
Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-7188/2018/1450-71881849093L.pdf |
Summary: | Experimental studies on the effect of geometrical characteristics
(restriction orifice free area and sparger configuration) on the riser gas
holdup of an external-loop airlift reactor have been conducted in this
paper. The impact of the addition of non-coalescing media, such as
n-butanol, was also investigated. In general, the decrease in the
restriction orifice free area led to a substantial increase (up to 90%) in
the riser gas holdup. The addition of n-butanol effected gas holdup to a
lesser extent, as it increased the gas holdup in the range of 4-15%,
depending on the restriction orifice free area. On the other hand, the
impact of the sparger type was observed only at lower gas velocities, for
which the sinter plate increased the gas holdup up to 20% in comparison to
the single orifice. The paper also presents an empirical correlation for the
estimation of the riser gas holdup with an average relative error of 7%.
Finally, a neural network model with an average relative error of 2.4% was
proposed. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 172025] |
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ISSN: | 1450-7188 2406-095X |