M.V. Avdeev, V.N. Bagratashvili, A.N. Konovalov, V.K. Popov, S.I. Tsypina, M.V. Sokolova, J. Ke, M. Poliakoff, W.Z.Wu, B. Wang, B.X. Han
Two-channel Fiberoptic Reflectometry of Supercritical Media
High precision two-channel fiberoptic reflectometer (OPR) has been developed for investigation of phase behavior of multi-component supercritical fluids in different areas of reactor. Phase behavior of binary mixtures СО2 + acetone, СО2 +methanol has been measured in a batch reactor in wide ranges of temperatures (20 ÷ 700°C) and pressures (50 ÷ 200 bar). The experimental data were compared with that calculated by Lorentz - Lorenz equation. Phase behavior of СО2 + acetophenone mixture in a flow capillary reactor has been investigated for different concentrations of acetophenone (7.5, 21.2, 34.1%). Our experiments with СО2 + methanol mixtures show the possibility to study phase behavior of multicomponent fluids in a flow supercritical fluid reactor filled with catalyst.
Key words: phase behavior, critical point, multi-component phases, fiberoptic reflectometry, flow reactor.