Perry’s Chemical Engineers’ Handbook (Perrys)

Source

Methods for calculating pure component properties from:

Perry’s Chemical Engineers’ Handbook, 7th Edition Perry, Green, Maloney, 1997, McGraw-Hill

Ideal Liquid Molar Heat Capacity (Constant Pressure)

Perry’s Handbook uses the following correlation for ideal liquid molar heat capacity:

\[c_{\text{p liq}} = C_1 + C_2 \times T + C_3 \times T^2 + C_4 \times T^3 + C_5 \times T^4\]

Units are \(\text{J/kmol}\cdotp\text{K}\).

Parameters

Symbol Parameter Name Units Description
\(C_1\) cp_mol_ig_comp_coeff_1 \(\text{J/kmol}\cdotp\text{K}\)  
\(C_2\) cp_mol_ig_comp_coeff_2 \(\text{J/kmol}\cdotp\text{K}^2\)  
\(C_3\) cp_mol_ig_comp_coeff_3 \(\text{J/kmol}\cdotp\text{K}^3\)  
\(C_4\) cp_mol_ig_comp_coeff_4 \(\text{J/kmol}\cdotp\text{K}^4\)  
\(C_5\) cp_mol_ig_comp_coeff_5 \(\text{J/kmol}\cdotp\text{K}^5\)  

Ideal Liquid Molar Enthalpy

The correlation for the ideal liquid molar enthalpy is derived from the correlation for the molar heat capacity and is given below:

\[h_{\text{liq}} - h_{\text{liq ref}} = C_1 \times (T-T_{ref}) + \frac{C_2}{2} \times (T^2 - T_{ref}^2) + \frac{C_3}{3} \times (T^3 - T_{ref}^3) + \frac{C_4}{4} \times (T^4 - T_{ref}^4) + \frac{C_5}{5} \times (T^5 - T_{ref}^5) + \Delta h_{\text{form, Liq}}\]

Units are \(\text{J/kmol}\).

Parameters

Symbol Parameter Name Units Description
\(C_1\) cp_mol_ig_comp_coeff_1 \(\text{J/kmol}\cdotp\text{K}\)  
\(C_2\) cp_mol_ig_comp_coeff_2 \(\text{J/kmol}\cdotp\text{K}^2\)  
\(C_3\) cp_mol_ig_comp_coeff_3 \(\text{J/kmol}\cdotp\text{K}^3\)  
\(C_4\) cp_mol_ig_comp_coeff_4 \(\text{J/kmol}\cdotp\text{K}^4\)  
\(C_5\) cp_mol_ig_comp_coeff_5 \(\text{J/kmol}\cdotp\text{K}^5\)  
\(\Delta h_{\text{form, Liq}}\) enth_mol_form_liq_comp_ref \(\text{J/kmol}\) Molar heat of formation at reference state

Note

This correlation uses the same parameters as the ideal liquid heat capacity.

Ideal Liquid Molar Entropy

The correlation for the ideal liquid molar entropy is derived from the correlation for the molar heat capacity and is given below:

\[s_{\text{liq}} - s_{\text{liq ref}} = C_1 \times ln(T/T_{ref}) + C_2 \times (T-T_{ref}) + \frac{C_3}{2} \times (T^2-T_{ref}^2) + \frac{C_4}{3} \times (T^3-T_{ref}^3) + \frac{C_5}{4} \times (T^4-T_{ref}^4) + s_{\text{form, Liq}}\]

Units are \(\text{J/kmol}\cdotp\text{K}\).

Parameters

Symbol Parameter Name Units Description
\(C_1\) cp_mol_ig_comp_coeff_1 \(\text{J/kmol}\cdotp\text{K}\)  
\(C_2\) cp_mol_ig_comp_coeff_2 \(\text{J/kmol}\cdotp\text{K}^2\)  
\(C_3\) cp_mol_ig_comp_coeff_3 \(\text{J/kmol}\cdotp\text{K}^3\)  
\(C_4\) cp_mol_ig_comp_coeff_4 \(\text{J/kmol}\cdotp\text{K}^4\)  
\(C_5\) cp_mol_ig_comp_coeff_5 \(\text{J/kmol}\cdotp\text{K}^5\)  
\(s_{\text{form, Liq}}\) entr_mol_form_liq_comp_ref \(\text{J/kmol}\cdotp\text{K}\) Standard molar entropy of formation at reference state

Note

This correlation uses the same parameters as the ideal liquid heat capacity.

Liquid Molar Density

Perry’s Handbook uses the following correlation for liquid molar density:

\[\rho_{liq} = \frac{C_1}{C_2^{1 + (1-\frac{T}{C_3})^{C_4}}}\]

Units are \(\text{kmol/}\text{m}^3\).

Parameters

Symbol Parameter Name Units Description
\(C_1\) dens_mol_comp_liq_coeff_1 \(\text{kmol/}\text{m}^3\)  
\(C_2\) dens_mol_comp_liq_coeff_2 None  
\(C_3\) dens_mol_comp_liq_coeff_3 \(\text{K}\)  
\(C_4\) dens_mol_comp_liq_coeff_4 None`  

Note

Currently, only the most common correlation form from Perry’s Handbook is implemented. Some components use different forms which are not yet supported.