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

Note

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

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_liq_comp_coeff_1	\(\text{J/kmol}\cdotp\text{K}\)
\(C_2\)	cp_mol_liq_comp_coeff_2	\(\text{J/kmol}\cdotp\text{K}^2\)
\(C_3\)	cp_mol_liq_comp_coeff_3	\(\text{J/kmol}\cdotp\text{K}^3\)
\(C_4\)	cp_mol_liq_comp_coeff_4	\(\text{J/kmol}\cdotp\text{K}^4\)
\(C_5\)	cp_mol_liq_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_liq_comp_coeff_1	\(\text{J/kmol}\cdotp\text{K}\)
\(C_2\)	cp_mol_liq_comp_coeff_2	\(\text{J/kmol}\cdotp\text{K}^2\)
\(C_3\)	cp_mol_liq_comp_coeff_3	\(\text{J/kmol}\cdotp\text{K}^3\)
\(C_4\)	cp_mol_liq_comp_coeff_4	\(\text{J/kmol}\cdotp\text{K}^4\)
\(C_5\)	cp_mol_liq_comp_coeff_5	\(\text{J/kmol}\cdotp\text{K}^5\)
\(\Delta h_{\text{form, Liq}}\)	enth_mol_form_liq_comp_ref	Base units	Molar heat of formation at reference state

Note

This correlation uses the same parameters as the ideal liquid heat capacity. Units of molar heat of formation will be derived from the base units defined for the property package.

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_liq_comp_coeff_1	\(\text{J/kmol}\cdotp\text{K}\)
\(C_2\)	cp_mol_liq_comp_coeff_2	\(\text{J/kmol}\cdotp\text{K}^2\)
\(C_3\)	cp_mol_liq_comp_coeff_3	\(\text{J/kmol}\cdotp\text{K}^3\)
\(C_4\)	cp_mol_liq_comp_coeff_4	\(\text{J/kmol}\cdotp\text{K}^4\)
\(C_5\)	cp_mol_liq_comp_coeff_5	\(\text{J/kmol}\cdotp\text{K}^5\)
\(s_{\text{form, Liq}}\)	entr_mol_form_liq_comp_ref	Base units	Standard molar entropy of formation at reference state

Note

This correlation uses the same parameters as the ideal liquid heat capacity. Units of molar entropy of formation will be derived from the base units defined for the property package.

Liquid Molar Density

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

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

\[\rho_{liq} = {C_1} + {C_2} \times {T} + {C_3} \times {T^2} + {C_4} \times {T^3} \space (2)\]

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

Parameters

Symbol	Parameter Name	Units (form 1)	Units (form 2)	Description
eqn_type	dens_mol_comp_liq_coeff_eqn_type	None	None	Flag in the set [1, 2]
\(C_1\)	dens_mol_comp_liq_coeff_1	\(\text{kmol/}\text{m}^3\)	\(\text{kmol/}\text{m}^3\)
\(C_2\)	dens_mol_comp_liq_coeff_2	None	\(\text{kmol/}\text{m}^3\text{K}\)
\(C_3\)	dens_mol_comp_liq_coeff_3	\(\text{K}\)	\(\text{kmol/}\text{m}^3\text{K}^2\)
\(C_4\)	dens_mol_comp_liq_coeff_4	None	\(\text{kmol/}\text{m}^3\text{K}^3\)

Note

When Perry’s methods are used, an equation form for liquid molar density must be specified as an additional coefficient ‘eqn_type.’ This parameter may be either ‘1’ or ‘2’ to select an equation form. The second correlation form for liquid molar density is most often used for water or o-terphenyl (values exist in Perry’s Handbook). Fitted coefficients must be entered with the correct Pyomo units to use a specific correlation form.