Measurement of rheological properties of corn stover suspensions |
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Authors: | Natalia V Pimenova Thomas R Hanley |
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Institution: | (1) Department of Chemical Engineering, University of Louisville, 40292 Louisville, KY |
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Abstract: | Corn stover is currently being evaluated as a feedstock for ethanol production. The corn stover suspensions fed to reactors
typically range between 10 and 40% solids. To simulate and design bioreactors for processing highly loaded corn stover suspensions,
the rheologic properties of the suspension must be measured. In systems with suspended solids, rheologic measurements are
difficult to perform owing to settling in the measurement devices. In this study, viscosities of corn stover suspensions were
measured using a helical ribbon impeller viscometer. A calibration procedure is required for the impeller method in order
to obtain the shear rate constant, k, which is dependent on the geometry of the measurement system. The corn stover suspensions are described using a power law
flow model. |
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Keywords: | Corn stover rheological properties helical impeller cone-and-plate impeller power law parameters |
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