10.1021/acs.analchem.7b05358.s001
Atena Sharbatian
Atena
Sharbatian
Ali Abedini
Ali
Abedini
ZhenBang Qi
ZhenBang
Qi
David Sinton
David
Sinton
Full Characterization of CO<sub>2</sub>–Oil
Properties On-Chip: Solubility, Diffusivity, Extraction Pressure,
Miscibility, and Contact Angle
American Chemical Society
2018
contact angle
Contact Angle Carbon
CO 2 projects
measurement
1 μ L
oil extraction process
CO 2
CO 2 emissions
utilization technologies target
crude oil mixture
MMP
greenhouse gas effects
CO 2 exposure
CO 2 solubilities
2018-01-24 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Full_Characterization_of_CO_sub_2_sub_Oil_Properties_On-Chip_Solubility_Diffusivity_Extraction_Pressure_Miscibility_and_Contact_Angle/5853030
Carbon
capture, storage, and utilization technologies target a
reduction in net CO<sub>2</sub> emissions to mitigate greenhouse gas
effects. The largest such projects worldwide involve storing CO<sub>2</sub> through enhanced oil recoverya technologically and
economically feasible approach that combines both storage and oil
recovery. Successful implementation relies on detailed measurements
of CO<sub>2</sub>–oil properties at relevant reservoir conditions
(<i>P</i> = 2.0–13.0 MPa and <i>T</i> =
23 and 50 °C). In this paper, we demonstrate a microfluidic method
to quantify the comprehensive suite of mutual properties of a CO<sub>2</sub> and crude oil mixture including solubility, diffusivity,
extraction pressure, minimum miscibility pressure (MMP), and contact
angle. The time-lapse oil swelling/extraction in response to CO<sub>2</sub> exposure under stepwise increasing pressure was quantified
via fluorescence microscopy, using the inherent fluorescence property
of the oil. The CO<sub>2</sub> solubilities and diffusion coefficients
were determined from the swelling process with measurements in strong
agreement with previous results. The CO<sub>2</sub>–oil MMP
was determined from the subsequent oil extraction process with measurements
within 5% of previous values. In addition, the oil–CO<sub>2</sub>–silicon contact angle was measured throughout the process,
with contact angle increasing with pressure. In contrast with conventional
methods, which require days and ∼500 mL of fluid sample, the
approach here provides a comprehensive suite of measurements, 100-fold
faster with less than 1 μL of sample, and an opportunity to
better inform large-scale CO<sub>2</sub> projects.