%0 Journal Article
%A Sharbatian, Atena
%A Abedini, Ali
%A Qi, ZhenBang
%A Sinton, David
%D 2018
%T Full Characterization of CO2–Oil
Properties On-Chip: Solubility, Diffusivity, Extraction Pressure,
Miscibility, and Contact Angle
%U 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
%R 10.1021/acs.analchem.7b05358.s001
%2 https://acs.figshare.com/ndownloader/files/10389219
%K contact angle
%K Contact Angle Carbon
%K CO 2 projects
%K measurement
%K 1 μ L
%K oil extraction process
%K CO 2
%K CO 2 emissions
%K utilization technologies target
%K crude oil mixture
%K MMP
%K greenhouse gas effects
%K CO 2 exposure
%K CO 2 solubilities
%X Carbon
capture, storage, and utilization technologies target a
reduction in net CO2 emissions to mitigate greenhouse gas
effects. The largest such projects worldwide involve storing CO2 through enhanced oil recoverya technologically and
economically feasible approach that combines both storage and oil
recovery. Successful implementation relies on detailed measurements
of CO2–oil properties at relevant reservoir conditions
(P = 2.0–13.0 MPa and T =
23 and 50 °C). In this paper, we demonstrate a microfluidic method
to quantify the comprehensive suite of mutual properties of a CO2 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 CO2 exposure under stepwise increasing pressure was quantified
via fluorescence microscopy, using the inherent fluorescence property
of the oil. The CO2 solubilities and diffusion coefficients
were determined from the swelling process with measurements in strong
agreement with previous results. The CO2–oil MMP
was determined from the subsequent oil extraction process with measurements
within 5% of previous values. In addition, the oil–CO2–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 CO2 projects.
%I ACS Publications