Phase behavior of tetradecane–hexadecane mixtures confined in SBA-15

Phase behavior of tetradecane–hexadecane mixtures ( n -C 14 H 30 –C 16 H 34 , C 14 –C 16 ) confined in SBA-15 (pore diameters 3.8, 7.8, and 17.2 nm) has been studied by differential scanning calorimetry. Phase diagram of the confined C 14 –C 16 mixtures is greatly influenced by the pore size, which is simple compared with that for the bulk. Melting points of C 14 and C 16 confined in SBA-15 display a linear relation with pore size. Meanwhile, the C 14 –C 16 mixtures have shown a similar melting behavior as pure C 14 and C 16 . Melting temperatures of three C 14 –C 16 /SBA-15 systems have been fitted as a function of mole fraction x C16 .