Abstract
In this study, the viscosity of a liquid carbon dioxide (<TEX>$LCO_2$</TEX>) 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 <TEX>$LCO_2$</TEX> 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 <TEX>$LCO_2$</TEX> was determined using turbulent friction relationship. At the second flow condition where unsteady flow is induced, the viscosity of <TEX>$LCO_2$</TEX> was measured using the half-time pressure decay data and was further compared with values calculated by the first method.
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