Siberian Federal University

Study of the molecular transport of benzene and cyclohexane in mesoporous mesostructured powders of SBA‑15 was carried out using the diffusion NMR method. An isotropic character of the translational motion of hydrocarbon molecules was observed on a length scale of 35–80 μm. It was found that at low content of hydrocarbons (φ<0.3, where φ is a mass content), the mobility of their molecules is 2–3 times higher than those typical for a liquid media. It was also shown that for benzene molecules, unlike to cyclohexane, in the range of 0.4<φ<0.6 the hindering of translational motion is observed as compared to those in liquid state, which can potentially lead to a shift of the equilibrium in the benzene/ cyclohexane mixture at the outlet of the porous material sample