Comparison of Viscosity Measurement of a Liquid Carbon Dioxide Used for a High-Pressure Coal Gasifier

Title & Authors
Comparison of Viscosity Measurement of a Liquid Carbon Dioxide Used for a High-Pressure Coal Gasifier
KIM, KANGWOOK; KIM, CHANGYEON; KIM, HAKDUCK; SONG, JUHUN;

Abstract
In this study, the viscosity of a liquid carbon dioxide ($\small{LCO_2}$) that can potentially be used in a wet feed coal gasifier was evaluated. A pressurized capillary viscometer was employed to obtain the viscosity data of $\small{LCO_2}$ using two different methods. During the first method, the measurements were conducted under quasi-steady and high pressure flow conditions where two-phase flow was greatly minimized. The viscosity of $\small{LCO_2}$ was determined using turbulent friction relationship. At the second flow condition where unsteady flow is induced, the viscosity of $\small{LCO_2}$ was measured using the half-time pressure decay data and was further compared with values calculated by the first method.
Keywords
Coal gasifier;Liquid carbon dioxide (LCO2);Viscosity;Capillary viscometer;Half-time pressure decay;Turbulent friction relationship;
Language
Korean
Cited by
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