Perry’s Chemical Engineers’ Handbook

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:

\[\frac{c_{\text{p liq}, j}}{1000} = C_1 + C_2 \times T + C_3 \times T^2 + C_4 \times T^3 + C_5 \times T^4\]

Parameters

Symbol Parameter Name Indices Description
\(C_1, C_2, C_3, C_4, C_5\) cp_mol_liq_comp_coeff component, [1, 2, 3, 4, 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:

\[\frac{h_{\text{liq}, j} - h_{\text{liq ref}, j}}{1000} = C_1 \times (T-T_{ref}) + \frac{C_2}{2} \times (T^2 - T_{ref}^2) + \frac{C_3}{3} \times (T^3 - T_{ref}^3) + \frac{C_4}{4} \times (T^4 - T_{ref}^4) + \frac{C_5}{5} \times (T^5 - T_{ref}^5) + \Delta h_{\text{form, Liq}, j}\]

Parameters

Symbol Parameter Name Indices Description
\(C_1, C_2, C_3, C_4, C_5\) cp_mol_liq_comp_coeff component, [1, 2, 3, 4, 5]  
\(\Delta h_{\text{form}}\) enth_mol_form_phase_comp_ref phase, component Molar heat of formation at reference state
\(T_{ref}\) temperature_ref None Temperature at reference state

Note

This correlation uses the same parameters as for the ideal gas 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:

\[s_{\text{liq}, j} = C_1 \times ln(T) + C_2 \times T + \frac{C_3}{2} \times T^2 + \frac{C_4}{3} \times T^3 + \frac{C_5}{4} \times T^4 + s_{\text{ref, Vap}, j}\]

Parameters

Symbol Parameter Name Indices Description
\(C_1, C_2, C_3, C_4, C_5\) cp_mol_liq_comp_coeff component, [1, 2, 3, 4, 5]  
\(s_{\text{ref}}\) entr_mol_phase_comp_ref phase, component Standard molar entropy at reference state

Note

This correlation uses the same parameters as for the ideal gas heat capacity.

Liquid Molar Density

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

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

Parameters

Symbol Parameter Name Indices Description
\(C_1, C_2, C_3, C_4\) dens_mol_comp_liq_coeff component, [1, 2, 3, 4]  

Note

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