Evaluation of Systematic Error and Uncertainty of Viscosity Measurements of Mixtures of Monoethanol Amine and Water in Coaxial Cylinder Rheometers

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 o C are measured. This is the normal temperature range for a traditional amine based CO 2 capture process. Viscosity deviations are modeled according to Redlich-Kister type correlation and parameters are found through a regression analysis.

Density, Viscosity and Free Energy of Activation for Viscous Flow of Monoethanol Amine (1) + H2O (2) + CO2 (3) Mixtures

“…The measured viscosities of aqueous MEA are tabulated with literature data in Table 7. Our previous work has reported viscosities of aqueous MEA from w 1 = 0.3 to w 1 = 0.5 in Karunarathne, et al [25]. Figure 5 shows the calculated and fitted ∆G E * and Figure 6 compares the measured with calculated viscosities using the proposed correlation in this work and correlations suggested in the literature.…”

Identifikasi Dan Perhitungan Ketidakpastian Pengujian Viskositas Karaginan Menggunakan Viskometer Rotari

“…Evaluasi ketidakpastian viskometer dapat dilakukan menggunakan larutan standar (Zubler, 2011). Evaluasi ketidakpastian pengukuran viskositas dari campuran monoetanol amine dan air menggunakan viskometer kinemati pernah dilaporkan (Karunarathne, Eimer, & Øi, 2018). Sejauh ini belum pernah dilaporkan evaluasi ketidakpastian pengukuran viskositas dari produk yang memiliki fase padat (tepung), yang membutuhkan preparasi sampel sehingga diperoleh larutan yang siap diukur dengan viskometer, seperti tepung karaginan.…”

Physical Properties of MEA + Water + CO2 Mixtures in Postcombustion CO2 Capture: A Review of Correlations and Experimental Studies

“…Previous studies have attempted to cover the viscosity data in the range of 0-100 mass% MEA [14,17,33]. Measurements at a temperature above 373.15 K are reported in [33,36]. For CO 2 -loaded aqueous MEA, most of the reported studies presented the viscosity of 30 mass% MEA solutions within the CO 2loading range of 0-0.5 mol CO 2 /mol MEA.…”