Excel library for process calc's including distillation

[stawad]

thank you all for the contributes !
I have a question concerning water dew point in hydrocarbons as calculated with Prode Properties,
Prode shows a water dew point line (when there is free water) or a three phase curve (when condensate includes water + hydrocarbons),
can I presume that in other cases water is contained in vapor phase (i.e. no free water) ?

[carlo.stenali]

yes,
Prode Properties calculates the three phase lines which are the equilibrium lines where water (or hydrocarbons) begin to condense or vaporize,
see the attached image for a typical Water + Hydrocarbons phase diagram,
there are two three phase lines, the first (on the left) is the bubble line where hydrocarbons + water are all liquid, the second line is where the water begins to vaporize.

[stawad]

thanks Carlo,
I have several natural gas streams with different amounts of water,
I need to identify where water begins to condensate,
the vapor-liquid-solid phase envelope utility available in Prode Properties is really useful for that,
I understand that at dew point line all water is in vapor phase,
and at buuble line water, hydrocarbons and inhibitors are all in liquid phase,
with a isothermal flash at a three phase line condition I get different compostions of water and inhibitors,
which should indicate a incipient composition, is this correct ?

[carlo.stenali]

for water-hydrocarbons equilibria (Vapor-liquid-liquid phase envelope or phase diagram) you may observe several cases:

a) values for water dew point temperature above the values of hydrocarbons dew point,
there is a separate water dew point line, below water dew point line there is liquid water (free water)

b) values for water dew point temperature below the values of hydrocarbons dew point,
there is a three phase line indicating the point where water begin to condense

c) values for water dew point temperature below and above the values of hydrocarbons dew point,
there is a three phase line where water (or hydrocarbons) begin to condensate

you can easily create the different cases with Prode Properties utility for generating the vapor-liquid-liquid phase envelope,
just define a mixture of hydrocarbons, then add different amounts of water

[psensel]

Carlo,
can I utilize the vapor-liquid-liquid and vapor-liquid-solid phase envelope utility available in Prode Properties
to generate diagrams for non-hydrocarbons as methanol, ammonia et c.
That would be very useful for me.

for water-hydrocarbons equilibria (Vapor-liquid-liquid phase envelope or phase diagram) you may observe several cases:

a) values for water dew point temperature above the values of hydrocarbons dew point,
there is a separate water dew point line, below water dew point line there is liquid water (free water)

b) values for water dew point temperature below the values of hydrocarbons dew point,
there is a three phase line indicating the point where water begin to condense

c) values for water dew point temperature below and above the values of hydrocarbons dew point,
there is a three phase line where water (or hydrocarbons) begin to condensate

you can easily create the different cases with Prode Properties utility for generating the vapor-liquid-liquid phase envelope,
just define a mixture of hydrocarbons, then add different amounts of water

[carlo.stenali]

yes, you can utilize the vapor-liquid-liquid and vapor-liquid-solid phase envelope utility available in Prode Properties to generate phase diagrams of any mixture,
please note that results will depend from the thermodynamic model which you will select,
for non-hydrocarbons you may consider models as
NRTL with Wong-Sandler mixing rules
UNIQUAC with Wong-Sandler mixing rules
Wilson with Wong-Sandler mixing rules
NRTL with Huron Vidal mixing rules
UNIQUAC with Huron Vidal mixing rules
Wilson with Huron Vidal mixing rules
I have not tested the phase envelope utility with models for electrolytes and I cannot give a comment,
for all other models which I have tested it works fine in Excel 2003, Excel 2007 and Excel 2010 (my version),
also it works in matlab,
you can easily expand the feature (if requested) information is provided in this thread

Carlo,
can I utilize the vapor-liquid-liquid and vapor-liquid-solid phase envelope utility available in Prode Properties
to generate diagrams for non-hydrocarbons as methanol, ammonia et c.
That would be very useful for me.

for water-hydrocarbons equilibria (Vapor-liquid-liquid phase envelope or phase diagram) you may observe several cases:

a) values for water dew point temperature above the values of hydrocarbons dew point,
there is a separate water dew point line, below water dew point line there is liquid water (free water)

b) values for water dew point temperature below the values of hydrocarbons dew point,
there is a three phase line indicating the point where water begin to condense

c) values for water dew point temperature below and above the values of hydrocarbons dew point,
there is a three phase line where water (or hydrocarbons) begin to condensate

you can easily create the different cases with Prode Properties utility for generating the vapor-liquid-liquid phase envelope,
just define a mixture of hydrocarbons, then add different amounts of water

[psensel]

thanks Carlo,
Patrick

yes, you can utilize the vapor-liquid-liquid and vapor-liquid-solid phase envelope utility available in Prode Properties to generate phase diagrams of any mixture,
please note that results will depend from the thermodynamic model which you will select,
for non-hydrocarbons you may consider models as
NRTL with Wong-Sandler mixing rules
UNIQUAC with Wong-Sandler mixing rules
Wilson with Wong-Sandler mixing rules
NRTL with Huron Vidal mixing rules
UNIQUAC with Huron Vidal mixing rules
Wilson with Huron Vidal mixing rules
I have not tested the phase envelope utility with models for electrolytes and I cannot give a comment,
for all other models which I have tested it works fine in Excel 2003, Excel 2007 and Excel 2010 (my version),
also it works in matlab,
you can easily expand the feature (if requested) information is provided in this thread

Carlo,
can I utilize the vapor-liquid-liquid and vapor-liquid-solid phase envelope utility available in Prode Properties
to generate diagrams for non-hydrocarbons as methanol, ammonia et c.
That would be very useful for me.

for water-hydrocarbons equilibria (Vapor-liquid-liquid phase envelope or phase diagram) you may observe several cases:

a) values for water dew point temperature above the values of hydrocarbons dew point,
there is a separate water dew point line, below water dew point line there is liquid water (free water)

b) values for water dew point temperature below the values of hydrocarbons dew point,
there is a three phase line indicating the point where water begin to condense

c) values for water dew point temperature below and above the values of hydrocarbons dew point,
there is a three phase line where water (or hydrocarbons) begin to condensate

you can easily create the different cases with Prode Properties utility for generating the vapor-liquid-liquid phase envelope,
just define a mixture of hydrocarbons, then add different amounts of water

[matrenel]

thanks all for the news !
I read regularly this thread,
very interesting

[carlo.stenali]

for vapor-liquid-liquid phase envelope the selection of a suitable model for gas and liquid fugacities is the most important factor,
you may get very different results selecting different models.

[Crob]

I need to characterize petroleum components,
the manual says that Prode Properties includes a module for characterization of petrleum fractions,
can I enter a ASTM curve ?

[hans23]

Hi Crob,
make sure to have the module for characterizing petroleum fractions activated in your Prode Properties license,
with this module you can enter distillation curves (ASTM, TBP etc.) as well as densities, viscosities etc.

[hans23]

Hi Crob,
make sure to have the module for characterizing petroleum fractions activated in your Prode Properties license,
with this module you can enter distillation curves (ASTM, TBP etc.) as well as densities, viscosities etc.