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

Abstract

CO2 miscible flooding occurs when injection pressure is higher than the minimum miscibility pressure (MMP) which can exceed the fracture pressure. Co-solvents are expected to reduce the MMP by interacting with various hydrocarbons that depend on the polarity and intermolecular forces of solvent and oil. However, there are limited studies that have investigated co-solvent performance in CO2 injection through an extraction process based on oil compositional analysis. This paper is aimed at studying the effects of carbonyl and hydroxyl compounds on oil extraction and also the mutual interactions of CO2-oil-carbonyl and -hydroxyl. The experiment is conducted by using VIPS (viscosity, interfacial tension, pressure-volume, and swelling) and gas chromatography (GC) apparatuses. The compositional results from GC are utilized to analyze the performance of co-solvents, which are further classified based on the carbon number and molecular structure of oil. Acetone is a non-associated polar compound which reacts easily with and assists CO2 to extract polar-aromatic heavy and slightly polar components such as alkenes and straight-chain alkanes, due to high polarizability and low cohesive forces. Ethanol is a self-associated polar compound which has the capability of extracting high-boiling fractions and slightly polar-aromatic components. Moreover, both co-solvents also assist CO2 to extract non-polar components because they have non-polar end in the alkyl group.

Short Communication: Differences in phytochemical compounds and antioxidant activity of Portulaca oleracea and Portulaca grandiflora

“…The samples were pollinated after drying in an oven, while extraction was carried out with the combined sonication-maceration method. The solvent used was 70% ethanol which can extract both polar and non-polar organic compounds from the sample (Permadi et al 2021). After obtaining the extract, phytochemical screening was conducted to determine the class of active compounds from the plants.…”

Comprehensive Review of the Determination and Reduction of the Minimum Miscibility Pressure during CO2 Flooding

“…Permadi et al 91 found that low-carbon alcohols, such as methanol and ethanol, can enhance the extraction performance of CO 2 , thereby reducing MMP.…”

Antibacterial Activity ofAndrographis paniculataandPiper betleand their Interactive Effects with Amoxicillin Against Selected Respiratory Pathogens

“…There were studies that indicate the limitations of the disk diffusion method when it comes to the lack of diffusion of non-polar molecules into the aqueous agar matrix that is used in the assay (Eloff, 2019). Although ethanol is generally a polar solvent, it has a non-polar structure which helps in its ability to also extract non-polar compounds (Permadi et al, 2020). It is possible that the ethanol extract of P. betle may also contain nonpolar molecules which had antimicrobial activity but was not able to diffuse well into the agar.…”