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Supercritical CO2 properties versus P & T

Supercritical CO2 properties versus P & T

Supercritical CO2 properties versus P & T

(OP)
I'm looking for quality data on the density of supercritical CO2 as a function of Temperature and Pressure. Can anyone guide me to a reliable website, or property databook?

Any help appreciated.

RE: Supercritical CO2 properties versus P & T

Have you tried NIST?

RE: Supercritical CO2 properties versus P & T

(OP)
Thanks, found it. Totally forgot about NIST :/

RE: Supercritical CO2 properties versus P & T

Just checking the NIST site...it looks like NIST has expanded the coverage of their database significantly, to about 70+ light gases, hydrocarbons up to C10, and refrigerants.  Besides CO2, there is methanol, ammonia and others.

Here is the link for completeness:
http://webbook.nist.gov/chemistry/

From the NIST Chemistry Webbook, scroll down and click on
Thermophysical Properties of Fluid Systems

Then select the pure component from the drop-down list.

I believe that these equations are also in the REFPROP software, also from NIST.

RE: Supercritical CO2 properties versus P & T

(OP)
Brilliant site, just awesome, but how rigorous are the calculations? Can it be used in,say, a publication?
Seems almost to good to be true that a java applet can churn out data like this...

RE: Supercritical CO2 properties versus P & T


The direct, straight path to accurate, recognized, and authoritative Thermophysical Properties of Fluid Systems is:

http://webbook.nist.gov/chemistry/fluid/

For quite some years now we’ve been recommending engineers – especially young grads – to use these free and authoritative sources of necessary engineering data.  Just some of the past Eng-Tips threads that reflect this are:

thread124-171790: CO2 compression

thread135-170032: Superheated Gas / Flash Liquid Mixing

thread135-145412: Liquid CO2 storage

thread391-161822: R134 properties wanted

thread391-155157: Cryogenic Steam Tables

thread378-150046: N2 amount for pipeline pressure test

thread378-92938: Gas Compressibility factor spreadsheet

This is a great site for:

1) Density;
2) Cp;
3) Enthalpy;
4) Internal energy;
5) Viscosity;
6) Joule-Thomson coefficient;
7) Specific volume;
8) Cv;
9) Entropy;
10) Speed of Sound;
11) Thermal conductivity; and,
12) Surface tension (saturation curve only).

For 34 compounds.  It's an excellent site for Thermodynamic data; it’s free, tax-paid, authoritative, accurate, recognized, and you can take it to court as your basis for calculations and engineering decisions.  Who would argue against using it as a basis for calculations?  It's as authoritative as you are going to get.

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