Abstract
Headspace gas chromatography (HSGC) is a relatively new and promising technique to study the vapour-liquid equilibrium (VLE) of mixtures. It is simple, accurate, and fast. The VLE of 1-propanol-water mixtures was studied at 60°C in the absence and in the presence of 3A and 4A molecular sieves using the HSGC technique. The results obtained showed that the VLE of 1-propanol-water mixtures was altered significantly in the presence of molecular sieves and the azeotropic point of the system, at about 40 mol% 1-propanol in the normal case, was eliminated in the presence of the molecular sieves.
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