Rheology and pipeline transportation of final molasses

Leong, Y., Maguire, K., and Ridd, M.J. (2002) Rheology and pipeline transportation of final molasses. International Sugar Journal, 104 (1238). pp. 59-63.

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The rheology of final molasses at temperature (T) ranging from 20 to 70°C was characterised with a cone and plate viscometer. The shear-thinning power law model described its flow behaviour very well. In the Arrhenius plot of log viscosity at given shear rate versus 1/T, two linear regions were apparently displayed. It showed that the viscosity is relatively more sensitive to temperature between 20 and 50°C. The rheological data were used to calculate pumping energy consumption, P (kW-h/t-km), an important cost parameter in the feasibility study of long distance pipeline transportation. As the molasses viscosity is inherently high at the ambient temperature of about 30°C, its transportation in pipeline will be in the laminar regime for an average throughput of 50 t/h using the normal pipe size range of between 5 and 24 in. For transport in the turbulent flow regime, the temperature, throughput and pipe diameter must all be high. Normally the P decreases with increasing diameter and temperature, and with decreasing throughput.

Item ID: 13550
Item Type: Article (Research - C1)
ISSN: 0020-8841
Keywords: molasses flow; pipeline transport
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Date Deposited: 12 Nov 2010 01:41
FoR Codes: 09 ENGINEERING > 0908 Food Sciences > 090802 Food Engineering @ 60%
03 CHEMICAL SCIENCES > 0399 Other Chemical Sciences > 039903 Industrial Chemistry @ 40%
SEO Codes: 86 MANUFACTURING > 8606 Industrial Chemicals and Related Products > 860699 Industrial Chemicals and Related Products not elsewhere classified @ 100%
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