FLUID-PHASE EQUILIBRIA IN MIXTURES OF WATER AND HEAVY HYDROCARBONS AT ELEVATED TEMPERATURES AND PRESSURES
Abstract
In industry today, there remains a need for basic information on the fluid-phase equilibrium of mixtures of water and hydrocarbons, specifically, the heavy hydrocarbons characteristic of petroleum and coal liquids at the elevated temperatures and pressures of their processing. In this work, measurements are collected for the mutual solubility of six binary hydrocarbon (hydrocarbon derivative) + water systems at the vapor-liquid-liquid equilibrium pressure at moderate temperatures. In addition, high temperature, high pressure ternary vapor-liquid equilibrium data are collected for two hydrogen and one methane ternary systems involving heavy hydrocarbons and water. Correlation of the data collected from the literature and this laboratory is achieved by means of a modified Cubic Chain-of-Rotators (CCOR) equation of state. Originally developed for nonpolar and slightly polar fluids, specific equation constants are adopted in this work to extend the CCOR equation to accurately model the saturated properties of pure polar fluids. Extension of the model to the description of the fluid phase equilibrium of highly nonideal mixtures involving polar components is achieved in the use of simple quadratic and cubic mixing rules for the equation constants.
Degree
Ph.D.
Subject Area
Chemical engineering
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