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Characterization of Microemulsion of Crude Oil Using Alkali-Surfactant Solution

알칼리-계면활성제 용액을 이용한 인도네시아 A원유의 마이크로에멀전 특성

  • Lee, Sang Heon (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Kim, Sang Kyum (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Bae, Wisup (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Rhee, Young Woo (Graduate School of Energy Science and Technology, Chungnam National University)
  • 이상헌 (충남대학교 바이오응용화학과) ;
  • 김상겸 (충남대학교 에너지과학기술대학원) ;
  • 배위섭 (세종대학교 에너지자원공학과) ;
  • 이영우 (충남대학교 에너지과학기술대학원)
  • Received : 2014.12.31
  • Accepted : 2015.04.01
  • Published : 2015.06.10

Abstract

For the enhanced oil recovery, one of the most important factors is to determine the surfactant formulation in chemical flood. The objective of this study is to analyze the microemulsion formed between the alkali-surfactant (AS) solution and A crude oil for screening surfactants. The alkali-surfactant solution was manufactured by using the surfactant purchased from AK ChemTech. $C_{16}-PO_7-SO_4$ and sodium carbonate solution were used as surfactant and alkaline, respectively. Both TEGBE and IBA were used as a co-solvent. The AS solution and A crude oil can form a Type III middle phase microemulsion at the salinity from 0.0 wt%~3.6 wt%. Increasing the salinity causes the phase transition of microemulsion from the lower (Type I) to middle (Type III) to upper (Type II) phase. Interfacial tension (IFT) values calculated by Huh's equation were in good agreement with ultralow IFT. According to this characteristic, the surfactant purchased from a domestic company can be applied to the enhanced oil recovery.

Keywords

surfactant;microemulsion;interfacial tension;phase behavior

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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