Fig. 19
Molecular Diffusion Coefficients of Virgin Asphalt, Long-Term Aged Asphalt, and nano-SiO2 Modified Asphalt at 333 K. It shall be noted that As1 is for asphaltene-phenol, As2 is for asphaltene-pyrrole, As3 is for asphaltene-thiophene, Re1 is for benzobisbenzothiophene, Re2 is for pyridinohopane, Re3 is for quinolinohopane, Re4 is for thioisorenieratane, Re5 is for trimethylbenzeneoxane, Ar1 is for dioctyl-cyclohexane-naphthalene (DOCHN), Ar2 is for perhydrophenanthrene-naphthalene (PHPN), Sa1 is for hopane, and Sa2 is for squalane