César R. Chamorro

Excess thermodynamic functions for ternary systems containing fuel oxygenates and substitution hydrocarbons. 1. Total-pressure data and GE for methyl tert-butyl etherbenzenecyclohexane at 313.15 K

Abstract Experimental isothermal P–x–y data for the ternary system (methyl tert-butyl ether (MTBE)+n-heptane+1-hexene) and for its corresponding binaries at 313.15 K are reported. Data reduction by Barkers method provides correlations for GE using the Margules equation for the binary systems, the Wohl expansion for the ternary system and Wilson, NRTL and UNIQUAC models for both binary and the ternary mixtures.

Phase equilibrium properties of binary and ternary systems containing tert-amylmethyl ether (TAME) as oxygenate additive and gasoline substitution hydrocarbons at 313.15 K

Abstract Experimental isothermal P – x – y data for the binary systems ( tert -amylmethyl ether (TAME)+the hydrocarbons n -heptane, cyclohexane, benzene and 1-hexene) and the ternary system ( tert -amylmethyl ether (TAME)+1-hexene+cyclohexane) at 313.15 K are reported. Data reduction by Barkers method provides correlations for G E using the Margules equation for the binary systems and the Wohl expansion for the ternary system. Wilson, NRTL and UNIQUAC models have been applied successfully to both the binary and the ternary systems presented here and they have been used for predicting the behaviour of the other ternary systems involving TAME+hydrocarbon+hydrocarbon, where the four types of substitution hydrocarbons have been used.

Experimental investigation of the vapor–liquid equilibrium at 313.15 K of the ternary system tert-amylmethyl ether (TAME)+n-heptane+methanol

Abstract Experimental isothermal P–x data at 313.15 K for the ternary system (tert-amylmethyl ether (TAME)+n-heptane+methanol) and for one of the unmeasured constituent binary systems, (tert-amylmethyl ether (TAME)+methanol) are reported. Data reduction by Barkers method provides correlations for gE using the Margules equation for the binary systems and the Wohl expansion for the ternary system. Wilson, NRTL and UNIQUAC models have been applied successfully to both the binary and the ternary systems. The presence of azeotropes in the ternary system and constituent binaries are studied as well as the presence of immiscible zones.

Geothermal Power Technologies

Although geothermal energy has been widely deployed for direct use in locations with especial geologic manifestations, its potential for power generation has been traditionally underestimated. Recent technology developments in drilling techniques and power conversion technologies from low-temperature heat resources are bringing geothermal energy to the spotlight as a renewable baseload energy option for a sustainable energy mix. Although the environmental impact and economic viability of geothermal exploitation must be carefully evaluated for each case, the use of deep low-temperature geothermal reservoirs could soon become an important contributor to the energy generation around the world.