SYNTHESIS AND CHARACTERIZATION OF NATURAL SURFACTANT FOR ENHANCED OIL RECOVERY APPLICATION
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Date
2024-04-12
Authors
Tukhfatova, Aibike
Journal Title
Journal ISSN
Volume Title
Publisher
Nazarbayev University School of Mining and Geosciences
Abstract
Enhanced Oil Recovery (EOR) techniques rely on chemical agents, but the excessive utilization of synthetic chemicals presents environmental and economic issues. Natural surfactants have become known as a viable option for Chemically Enhanced Oil Recovery (CEOR) processes. These natural agents are being acknowledged for being eco-friendly, less harmful, and cost-efficient in comparison to conventional synthetic surfactants. However, ongoing research and investigation are necessary to determine the extent to which natural surfactants can be effectively utilized across a range of conditions.
The study seeks to illustrate that surfactants derived from neem powder possess the capability to function as a viable replacement for conventional surfactants in oil recovery procedures. The research commences by creating a surfactant sourced from sustainable materials, mainly neem powder and olive oil, in conjunction with sodium hydroxide (NaOH). The synthesis procedure entails an infusion of neem powder into olive oil, subsequently followed by the saponification reaction with NaOH. The resultant surfactant presents the benefit of being environmentally friendly and economically feasible.
In this research, the efficacy of the natural surfactant was evaluated through experimental assessments, including measurements of interfacial tension (IFT) and core flooding experiments. After confirming the natural surfactant's properties through FTIR, SEM, and EDS analyses, solutions of the surfactant were formulated at different concentrations. These concentrations ranged from 1 to 6 wt% in deionized water (DIW) and from 0,5 to 5 wt% in brine. The IFT findings indicated that the optimal critical micelle concentration (CMC) for the natural surfactant was determined to be 4,0 wt% in deionized water (DIW) and 0,9 wt% in brine. The brine-based surfactant solution reached a minimum IFT of 1,4 mN/m at the CMC point. The analysis investigated the influence of temperatures ranging from 35 to 55°C on the surfactant's efficacy, showcasing its consistent performance across the temperature range.
This study offers a valuable understanding of the possibilities of utilizing natural surfactants in EOR and underscores the necessity for additional research to enhance their effectiveness in practical applications.
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Keywords
Type of access: Embargo, natural surfactant, saponin, Interfacial Tension (IFT)
Citation
Tukhfatova, A. (2024). Synthesis and characterization of natural surfactant for enhanced oil recovery application. Nazarbayev University School of Mining and Geosciences