Modeling of precipitation considering multi-component form of Asphaltene using a solid solution framework

Characterization of crude oils and asphaltenes using the PC-SAFT EoS: A systematic review

“…In addition, the parameters of cubic EoSs are fitted at the critical point of the mixture where asphaltenes usually are not present due to their decomposition before reaching the critical point [35]. The higher accuracy of the PC-SAFT model compared to VR-SAFT and PR was also verified in several studies, in modeling the phase behavior of the asphaltene systems [64,65]. Another study [121] reported that the accuracy of the PR-EoS decreases sub stantially when high concentration aromatic solvent was mixed with asphaltenic reservoir fluid; the PC-SAFT however gave reasonable estimations of system's phase behavior at all concentrations.…”

“…The common choice for A + R parameter tuning is BPs and crude oil densities [58]. Some authors [52,56,64,129] apply the n-alkane dilution onsets for the asphaltene parameter fitting, especially if asphaltenes are considered to be polydisperse [52,53,112].…”

“…The PC-SAFT modeling approaches that consider the precipitated asphaltene as a solid phase were implemented by a number of researchers [63][64][65]. For example, Dehaghani et al [65] implemented a multi-solid approach that was initially used by Lira-Galeana et al [215] to model the precipitated paraffin wax as multiple solid phases that are insoluble in other solid phases.…”

“…Arya et al [41] demonstrated that the modeling accuracy can be greatly improved by including the association behavior between the asphaltenes and crude oil components. Several authors conducted modeling by representing the asphaltenes as a solid phase and applying the PC-SAFT for equilibrium calculations of liquid and gas phases [63][64][65]. The PC-SAFT EoS was used in series of studies for thermodynamic phase behavior calculations as a part of asphaltene deposition simulators [66][67][68][69][70][71].…”

An Investigation of the Effect of Asphaltene Polydispersity on Asphaltene Precipitation and Deposition Tendencies

“…This method has been coupled with various EOS models, including PC-SAFT, − CPA, − and recently with the classical cubic EOS . The SARA-based method has also been extended to include polydispersity of the asphaltene fraction using PC-SAFT ,,, and CPA . The Single Carbon Number (SCN)-based characterization method has also been coupled with PC-SAFT, CPA, and the classical cubic EOS to simulate asphaltene precipitation. − …”