The vapour pressures and heat capacities of liquid mixtures of methanefpropane and the heats of vaporization of methane from the mixtures have been measured in the temperature range 90 to 110°K. The experimental data have been used to obtain the activity coefficients of methane, the excess Gibbs energy, the heat of mixing and the excess heat capacity. The results are compared with the quasi-lattice theory of liquid mixtures of molecules of different size and with the consequences of the principle of corresponding states applied to liquid mixtures of chain molecules. The theoretical treatments yield values of the excess Gibbs energy and the heat of mixing which are in good agreement with experiment, but the agreement is less satisfactory for the excess heat capacity.
The role of chloride in the corrosion of oil- and coal-fired boilers and gas turbines, by flue gases and their deposits, is discussed, on the basis of both experimental and theoretical studies. It is concluded that in most boilers, the presence of chloride in the fuel will not result in any serious increase in the rate of corrosion of plant components. On the other hand, a number of situations are identified, which can arise in both boilers and gas turbines, in which high chloride levels in the fuel can be associated with enhanced rates of corrosion.
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