Abstract—In this study, the use of coaxial cylinder viscometer in viscosity measurements of monoethanol amine and water mixture is discussed. Random and systematic effects engage with the rheometer lead to deviate the measured quantity from its actual value. Compensation for the systematic effect is called as the bias and this compensation can not be done perfectly. The measurement uncertainty arises due to the lack of exact knowledge on what is being measured. Identification of uncertainty sources is vital in uncertainty analysis to evaluate the total uncertainty of a measuring technique. The calculated expanded (k=2) uncertainty of viscosity measurement of an alkanol amine and water mixture using a coaxial cylinder viscometer in this work is 0.0162 mPa·s. Further, the viscosities of mixtures of monoethanol amine and water mixtures under temperature 20-130 oC are measured. This is the normal temperature range for a traditional amine based CO2 capture process. Viscosity deviations are modeled according to Redlich-Kister type correlation and parameters are found through a regression analysis.
Index Terms—Viscosity, systematic error, uncertainty, MEA.
The authors are with the University of Southeast Norway, Norway (e-mail: sumuduunimrt@gmail.com)
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Cite: Sumudu S. Karunarathne, Dag A. Eimer, and Lars E. Ø, "Evaluation of Systematic Error and Uncertainty of Viscosity Measurements of Mixtures of Monoethanol Amine and Water in Coaxial Cylinder Rheometers," International Journal of Modeling and Optimization vol. 8, no. 5, pp. 260-265, 2018.
