adding property pack

[syed]

Dear sir!
i want simulation of (biodesel production from jatropha curcus plant) in coco, in this process triolen (TAG) react with methanol in the presence of sodium hydro oxide catalyst to produce glycerol and fatty acid methyl ester(FAME) or methyl oleate. i have to add property pack of triolen and methyl oleate,for this i need access to add property. please help me on this regard

[syed]

i add all properties which are essential except ideal gas heat capacity please help me where to find varient coefficients for ideal gas heat capacity

[colancto]

Look into Reid, Sherwood and Prausnitz (Properties of Gases and Liquids). There is the Benson group contribution scheme to estimate ideal gas capacity at different temperatures. Next you may fit a simple polynomial to the data. You may want also to have a look at www.chemeo.com from Céondo.

[jasper]

For which chemicals exactly are you looking for the ideal gas heat capacity?

[syed]

i want ideal gas heat capacity of Triolein( http://webbook.nist.gov/cgi/cbook.cgi?ID=122-32-7) and methyl oleate . the data available to me is (Molecular mass, Tc, Pc, Vc, acentric factor, Tb, Vb, Vl )

[jasper]

What kind of model will you be using? I presume something based on activities?

[syed]

i will use NRTL.

[jasper]

In this case I presume that this compound will not be in the vapor phase too much. As the liquid enthalpy is given by the sum of ideal heat capacity, heat of vaporizations and excess enthalpy, I suggest you put a liquid heat capacity into the heat of vaporization term, and use zero for the ideal gas heat capacity (or a small positive dummy value), and define a very low vapor pressure (e.g. 1e-20) so that practically all will go into the liquid phase.

[syed]

thank you sir

[syed]

sir i want to add component triolein the data available to me is
M(g/mol) 885.45
Tb (K) 827.40
VB (m3/kmol) 2.708
Vl (m3/kmol) .958
Tc 977.88
Pc bar 3.34
Vc (m3/kmol) 3.250
acentric factor (w) 1.9782

http://webbook.nist.gov/cgi/cbook.cgi?ID=122-32-7
i cant add the component please send me the procedure...