In this section
@article{Hu:2016:10.1021/acs.energyfuels.6b01858,
author = {Hu, R and Crawshaw, JP and Trusler, JPM and Boek, ES},
doi = {10.1021/acs.energyfuels.6b01858},
journal = {Energy & Fuels},
pages = {5776--5784},
title = {Rheology and phase behavior of carbon dioxide and crude oil mixtures},
url = {http://dx.doi.org/10.1021/acs.energyfuels.6b01858},
volume = {31},
year = {2016}
}
TY - JOUR
AB - The rheology of Zuata heavy crude oil, saturated with carbon dioxide, was studied at a temperature of 50 °C and pressures up to 220 bar. Observations of phase behavior were also reported and used to interpret the rheological data. The crude oil is very viscous and non-Newtonian at ambient pressure, but when brought into equilibrium with CO2, the non-Newtonian behavior was weakened and eventually disappeared at high CO2 pressures. When diluted with 10 and 30 wt % toluene, the diluted crude oils and their mixtures with CO2 behaved as Newtonian fluids. The CO2-saturated mixture of the crude oil samples showed an exponential decrease in viscosity with increasing CO2 pressure but an increase in viscosity at higher pressures. During observation through a view cell, the CO2 dissolution caused a swelling effect on the original crude oil. When saturated with CO2, the swelling effect also occurred on the 10 wt % diluted crude oil but the volume of the oil-rich phase was decreased at higher pressures. However, for the 30 wt % diluted crude oil, a second liquid phase was observed on top of the oil-rich phase, at pressures higher than the CO2 critical point. The mixture viscosity was inversely proportional to the CO2 solubility.
AU - Hu,R
AU - Crawshaw,JP
AU - Trusler,JPM
AU - Boek,ES
DO - 10.1021/acs.energyfuels.6b01858
EP - 5784
PY - 2016///
SN - 0887-0624
SP - 5776
TI - Rheology and phase behavior of carbon dioxide and crude oil mixtures
T2 - Energy & Fuels
UR - http://dx.doi.org/10.1021/acs.energyfuels.6b01858
UR - http://hdl.handle.net/10044/1/49545
VL - 31
ER -