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http://dx.doi.org/10.9713/kcer.2017.56.1.14

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))
Publication Information
Korean Chemical Engineering Research / v.56, no.1, 2018 , pp. 14-23 More about this Journal
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
Asphaltene removal ratio; Addition amount of DBSA; The level of self-aggregation of DBSA; Asphaltene colloid size; Adsorption mechanism;
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