Vapor-liquid equilibria of light hydrocarbons at low temperatures and high pressures: The methane-n-heptane system
| Autor: | Harry L. Chang, Lewis J. Hurt, Riki Kobayashi |
|---|---|
| Rok vydání: | 1966 |
| Předmět: |
chemistry.chemical_classification
Heptane Range (particle radiation) Environmental Engineering Chemistry General Chemical Engineering Thermodynamics Mole fraction Miscibility Methane chemistry.chemical_compound symbols.namesake Hydrocarbon Phase (matter) Phase rule symbols Physics::Chemical Physics Biotechnology |
| Zdroj: | AIChE Journal. 12:1212-1216 |
| ISSN: | 1547-5905 0001-1541 |
| DOI: | 10.1002/aic.690120629 |
| Popis: | Recent experimental observations of the phase behavior of methane–n-paraffin hydrocarbon binary systems are used to make a phase rule analysis of such systems. The vapor-liquid equilibria of light hydrocarbon systems are complicated by liquid-liquid immiscibility and solids formation at low temperatures. The system studied here has limited liquid phase miscibility with a quadruple point involving a gas phase, two liquid phases, and a solid phase. Experimental techniques were developed to sample and analyze gas phases containing concentrations of n-heptane in the range of 0.00001 mole fraction with good precision. Binary K values for methane and n-heptane are reported at intervals of 20°F. from 0° to −100°F. for pressures up to the criticals for the mixtures. The results are reported numerically and illustrated graphically. Additional phase observations were made below the critical temperature of methane to confirm and extend the phase behavior of the methane–n-heptane system as reported by Kohn. |
| Databáze: | OpenAIRE |
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