Supercritical extraction of crude oil by methanol- and ethanol-modified carbon dioxide

Mechanism of asphaltene aggregation induced by supercritical CO2: insights from molecular dynamics simulation

“…5 Rudyk et al achieved a total oil recovery ranging from 44-77% when scCO 2 was injected into dead oil with a density of 0.8573 kg L À1 . 6 However, one of the major drawbacks of CO 2 injection in oil elds is associated with the well-documented asphaltene deposition. This may cause pore throat plugging, permeability reduction, and wettability alteration in reservoirs, further resulting in a reduction in the recovery factor.…”

The Effect of Carbonyl and Hydroxyl Compounds Addition on CO2 Injection through Hydrocarbon Extraction Processes

“…The CO 2 -ethanol mixture injection is analyzed by GC at 131 • F of working temperature, while the CO 2 -acetone mixture injection is analyzed at 158 • F of working temperature. The working temperatures were chosen according to Rudyk et al [5,18] and Hussain [19]. To clarify the cases, Table 3 displays the case's names with their description based on GC results.…”

“…According to the parameters, ethanol is a better hydrogen bond acceptor (HBA) and hydrogen bond donor (HBD) as compared with acetone. Thus, ethanol has a tendency to extract heavy components [18] through HBA, also higher-boiling fractions [5], and associated n-mers [11] influenced by ethanol polarity. Ethanol also slightly extracts aromatic components because they can form a fairly weak hydrogen bond.…”

Effect of alcohol-treated CO2 on interfacial tension between CO2 and oil, and oil swelling

“…For methanol-treated CO 2 , IFTdifference varied from 0.02 to 0.2 mN/m; whereas for ethanoltreated CO 2 , IFT-difference varied from 0.02 to 1.42 mN/m. IFT reduction was more pronounced using ethanol-treated CO 2 because longer-chain alcohols can extract heavier components of hydrocarbons more readily than can shorter-chain alcohols (Rudyk et al, 2013;Almobarak et al, 2021).…”