Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Effect of Dodecylbenzene Sulfonic Acid on the Behavior of Asphaltene Aggregation in a Solvent Deasphalting System

  • Liu, Lingyu (Graduate School of Energy Science and Technology, Chungnam National University (CNU)) ;
  • Go, Kang Seok (Climate Change Research Division, Korea Institute of Energy Research (KIER)) ;
  • Nho, Nam Sun (Climate Change Research Division, Korea Institute of Energy Research (KIER)) ;
  • Kim, Kwang Ho (Climate Change Research Division, Korea Institute of Energy Research (KIER)) ;
  • Rhee, Young-Woo (Graduate School of Energy Science and Technology, Chungnam National University (CNU))
  • Received : 2017.08.28
  • Accepted : 2017.09.22
  • Published : 2018.02.01
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Abstract

The effect of dodecylbenzene sulfonic acid (DBSA) with different addition amount of DBSA ($M_{DBSA}$), temperatures and solvent-to-oil ratio (SOR, v/v) on asphaltene aggregation in a solvent deasphalting system was investigated. Increasing the $M_{DBSA}$ at SOR 10 and $55^{\circ}C$ caused the asphaltene removal ratio (ARR) to increase first, then maximize at 1 wt% of $M_{DBSA}$ and then decrease continuously. Based on the SARA (saturate, aromatic, resin, asphaltene) composition, the adsorption amount of DBSA on the asphaltene surface and the self-aggregation of the DBSA, the reason for the change in ARR with $M_{DBSA}$ was found due to the adsorption mechanism. In addition, the asphaltene-resin-DBSA colloidal size confirmed the change of adsorption behavior between the asphaltene and DBSA. Based on the results of this study, a hypothetical adsorption mechanism of DBSA on asphaltene aggregation in the solvent deasphalting system was conceived of and proposed.

Keywords

References

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