Combined experimental and molecular dynamics investigation of 1D rod-like asphaltene aggregation in toluene-hexane mixture

Role of Ionic Liquid in Asphaltene Dissolution: A Combined Experimental and Molecular Dynamics Study

“…The percent transmittance value decreasing as the number of aggregates in the sample increases is also observed in our earlier work. 33 It can also be seen in Figure 5 that, with a further increase in the concentration to 0.08 mL of [BMIM][PF 6 ], the peak intensity decreases moderately, as denoted by the blue line. We can conclude from Figure 5 that, as the concentration of [BMIM][PF 6 ] increases, the asphaltene separation increases as a result of the formation of the numerous IL droplets, where asphaltene is separated, leading to the smaller size of the aggregates.…”

“…31,32 The methodology adopted for the sample preparation and the filter paper method is described in detail in our recent work. 33 The samples are prepared and transferred in a Petri dish. During optical imaging, Petri dishes are closed with the lid to avoid the evaporation of the organic solvents.…”

“…peak intensities can be associated with the amount of asphaltene aggregates present in the sample. 33 The red line depicts the infrared (IR) spectrum of an asphaltene−toluene mixture, whereas the black line depicts the IR spectrum of pure asphaltene. The peak intensities denoted by the red line are slightly lower than those of pure asphaltene, where asphaltene is fully dissolved in toluene and there are no visible aggregates present in the sample.…”

Experimental and molecular dynamics studies on aggregation behaviour of salicylaldehyde azine ester

“…This phenomenon could be attributed to the increase in SAE aggregates formed, with maximum intensity of the peak in the case of the solvent mixture having 90% water. 26…”

“…This phenomenon could be attributed to the increase in SAE aggregates formed, with maximum intensity of the peak in the case of the solvent mixture having 90% water. 26 3.1.4 Optical microscopy studies. The aggregate formation of SAE in different water fractions (0, 10, 20, 50 and 90%) was viewed under an optical microscope and the images of the samples with f w = 0 and 90% are shown in Fig.…”