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Research on the Emulsifying Ability of Surfactants in Crude Oil

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Veröffentlicht/Copyright: 7. November 2013
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Abstract

A novel colorimetric method to measure the emulsifying ability of surfactants for crude oil has been proposed. The emulsifying ability of five surfactants for two kinds of crude oil was determined at different temperatures and salinities. The oil-water interfacial tension, particle size distribution of emulsion, emulsion stability and ability of reducing viscosity by emulsifying were investigated at the corresponding condition. The results show that there is no correlation between emulsifying ability and HLB value of surfactants. The property of crude oil has a certain impact on the emulsifying ability, and the interfacial activity is the main influencing factor on it. The emulsifying ability is affected obviously by temperature. At first it increases and then it decreases with rising temperature. Inorganic salts of low concentration are beneficial to enhance the emulsifying ability. The emulsifying ability has negative correlation with the particle size of emulsion, and positive correlation with the ability of reducing viscosity by emulsifying. There is no inevitable relation between emulsifying ability and emulsion stability.

Kurzfassung

Eine neue kolorimetrische Methode zur Messung des Emulgiervermögens von Tensiden mit Rohöl wurde vorgeschlagen. Das Emulgiervermögen von fünf Tensiden mit zwei Rohöltypen wurde bei verschiedenen Temperaturen und Salzfrachten bestimmt. Die Öl-Wasser-Grenzflächenspannung, die Partikelgrößenverteilung der Emulsion, die Emulsionsstabilität und die Reduktion der Viskosität aufgrund der Emulsionsbildung wurden bei entsprechenden Temperaturen untersucht. Die Ergebnisse zeigen, dass es keine Korrelation zwischen dem Emulgiervermögen und den HLB-Werte der Tenside existiert. Die Eigenschaft des Rohöls hat einen gewissen Einfluss auf das Emulgiervermögen. Die Grenzflächenaktivität hat den größten Einfluss. Das Emulgiervermögen wird deutlich von der Temperatur bestimmt. Zuerst nimmt sie mit steigender Temperatur zu und fällt dann ab. Anorganische Salze in geringer Konzentration fördern das Emulgiervermögen. Das Emulgiervermögen ist mit der Partikelgröße in der Emulsion negativ und mit der Reduktion der Viskosität aufgrund der Emulsionsbildung positiv korreliert. Es existiert keine zwangsläufige Beziehung zwischen dem Emulgiervermögen und der Emulsionsstabilität.

Key words:: Emulsifying ability; surfactant; colorimetric method; correlation
Stichwörter:: Emulgiervermögen; Tenside; Colorimetrisches Verfahren; Korrelation
1Lifeng Chen, 66 Yangtze River Road, Huangdao, Qingdao, P.R. China, Tel.: 15588678656, E-Mail:

Lifeng Chen was born in 1987. He obtained his Bachelor's Degree from Shandong Institute of light industry in 2010. He is now taking a Doctor's degree at China University of Petroleum (East China). His main field of research is the analysis of surfactants. Besides, he also specializes in research in chemical EOR and in other aspects of oil and gas production chemistry.

Xiutai Zhao was born in 1958. He obtained a Bachelor's Degree from China University of Petroleum (East China) in 1982 and a Ph.D. from the same university. Since 2001, he has been teaching and working at China University of Petroleum (East China). His main field of research is the analysis of surfactants and the chemical EOR.

Zengbao Wang was born in 1985. He obtained his Master's Degree at China University of Petroleum (East China) in 2010, now he is a teacher at China University of Petroleum (East China). His main field of research is the analysis of surfactants.

Jinyu Tang was born in 1987. He obtained his Bachelor's Degree from Southwest Petroleum University in 2011. He is now taking a Master's degree at China University of Petroleum (East China). He specializes in research in emulsion.

Baohua Feng was born in 1987. He obtained his Bachelor's Degree from China University of Petroleum (East China) in 2010. He is now taking a Master's degree at China University of Petroleum (East China).

Mingguang Tang was born in 1986. He obtained his Bachelor's Degree from China University of Petroleum (East China) in 2010. He is now taking a Master's degree at China University of Petroleum (East China). He specializes in research in chemical EOR.

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Received: 2012-08-21
Revised: 2013-01-06
Published Online: 2013-11-07
Published in Print: 2013-11-15

© 2013, Carl Hanser Publisher, Munich

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  2. Contents
  3. Abstracts
  4. Abstracts
  5. Application
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https://doi.org/10.3139/113.110277
Schlagwörter für diesen Artikel
Emulsifying ability; surfactant; colorimetric method; correlation

Artikel in diesem Heft

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Application
  6. Water-Dilutable Biocompatible Microemulsion Systems: Design and Characterisation
  7. Coal – Mycobacterium phlei Interaction and its Effect on Coal Cleaning
  8. Novel Surfactant
  9. Synthesis and Properties of N,N′-Bis(Sodium Lauryl Acyl Proyl Acid) Ethylenediamine
  10. Physical Chemistry
  11. Research of Surface Chemical Properties and Micellization Behavior of Sodium N-Lauroylglycine
  12. Synergistic Effects Between Sulfo-betain Zwitterionic Surfactant and Alcohol Ether Sulfate
  13. Research on the Emulsifying Ability of Surfactants in Crude Oil
  14. Selection of Promoter and Micellar Catalyst for Chromic Acid Oxidation of Tartaric Acid in Aqueous Medium at Room Temperature
  15. Synthesis
  16. Oligomerization of Glycerol on Layered Sodium Silicate Catalysts
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