Phase Behavior of pure substance
Abstract
The aim of this lab experiment was to enable learners to understand the phase behavior of a pure
substance. The experiment was carried out using the fluid-val educational system, two
experiment will be carried one using Ethane and another one using a mixture of methane gas and
heptane as a sample. The first experiment using ethane, ethane is charged to the PVT Cell and
maintained in that temperature throughout the experiment. The pressure was increased steadily
and the total volume of hydrocarbon record for each pressure increased. Using this data, a graph
of pressure-total volume for each temperature change was plotted. The plot showed a steady
increase of pressure-total volume as temperature increases. The graph of vapor pressure against
temperature gave a distinct phase. The phase of saturation temperature, saturation pressure and
critical point. The second experiment using a mixture of methane and heptane, the mixture of
methane and heptane was charged to PVT cell and that temperature kept constant throughout the
experiment. The pressure was increased to 6500 psi and pressured decreased at intervals, on each
interval of pressure decrease the total volume of hydrocarbon was recorded. Using this data, a
graph of pressure-total volume was constructed.
Introduction
A pure substance is the one with a fixed chemical composition. A pure substance can be a
single element, compound or a mixture as long as it has the same chemical composition in all
phases. A pure substance cannot have more than three coexisting phases at equilibrium. This lab
experiment will investigate the phase behavior of the pure substance. The pure substance to be
used in this experiment is ethane and a mixture of methane and heptane. The lab involved two
Abstract
The aim of this lab experiment was to enable learners to understand the phase behavior of a pure
substance. The experiment was carried out using the fluid-val educational system, two
experiment will be carried one using Ethane and another one using a mixture of methane gas and
heptane as a sample. The first experiment using ethane, ethane is charged to the PVT Cell and
maintained in that temperature throughout the experiment. The pressure was increased steadily
and the total volume of hydrocarbon record for each pressure increased. Using this data, a graph
of pressure-total volume for each temperature change was plotted. The plot showed a steady
increase of pressure-total volume as temperature increases. The graph of vapor pressure against
temperature gave a distinct phase. The phase of saturation temperature, saturation pressure and
critical point. The second experiment using a mixture of methane and heptane, the mixture of
methane and heptane was charged to PVT cell and that temperature kept constant throughout the
experiment. The pressure was increased to 6500 psi and pressured decreased at intervals, on each
interval of pressure decrease the total volume of hydrocarbon was recorded. Using this data, a
graph of pressure-total volume was constructed.
Introduction
A pure substance is the one with a fixed chemical composition. A pure substance can be a
single element, compound or a mixture as long as it has the same chemical composition in all
phases. A pure substance cannot have more than three coexisting phases at equilibrium. This lab
experiment will investigate the phase behavior of the pure substance. The pure substance to be
used in this experiment is ethane and a mixture of methane and heptane. The lab involved two
