Newtonian viscosity of high solids kraft black liquors: Effects of temperature and solids concentrations

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00026a039· OSTI ID:7278465

Zaman, A A; Fricke, A L ^[1]

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1. Univ. of Florida, Gainesville, FL (United States). Dept. of Chemical Engineering

The Newtonian (zero shear rate) viscosities of four different softwood kraft black liquors from a four variable-two level factorially designed experiment for pulping slash pine were determined for solids concentrations up to 84% and temperatures up to 140 C (413.2 K). Methods of measurement and estimation of zero shear rate viscosities from viscosity-shear rate data have been described and compared. The combination of the absolute reaction rates and free-volume concepts were used to express the relationship between the Newtonian viscosity and temperature. Attempts were made to obtain a generalized correlation for Newtonian viscosity as a function of temperature and solids concentrations. The results of this model and results of the previous empirical correlation have been compared and discussed.

• DOE Contract Number: FG02-85CE40740
• OSTI ID: 7278465
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 33:2; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
098000* -- Biomass Fuels-- Waste Management-- (1990-)
CONCENTRATION RATIO
CONIFERS
DELIGNIFICATION
INDUSTRIAL WASTES
LIQUID WASTES
MATHEMATICAL MODELS
PINES
PINOPHYTA
PLANTS
SPENT LIQUORS
TREES
VISCOSITY
WASTES