Skip to content

Class: HydrogenSulfide

Description

The HydrogenSulfide class represents the properties and constants for Hydrogen Sulfide (H₂S).
It provides physical and thermodynamic properties required in process engineering simulations and calculations.
All constants are from Perry's Chemical Engineers' Handbook, 8th ed., Section 2 (compound no. 188).

Properties

  • name (string): Hydrogen Sulfide
  • formula (string): H₂S
  • molecular_weight (float): 34.081 g/mol

Class Reference

class HydrogenSulfide()

Parameters:
* temperature: Temperature, default = Temperature(25,"C")
* pressure: Pressure, default = Pressure(1,"atm")
* density: Density, default = None
* specific_heat: SpecificHeat, default = None
* viscosity: Viscosity, default = None
* thermal_conductivity: ThermalConductivity, default = None
* vapor_pressure: Pressure, default = None
* enthalpy: HeatOfVaporization, default = None
* phase: str, default = None ("liquid" or "gas" overrides the vapor-pressure test)

Methods

The properties of the HydrogenSulfide class are calculated using the following methods, inherited from the base Component class.

  • phase(): Detects the phase of the substance ("liquid" or "gas") by comparing the system pressure and vapor pressure. (At standard conditions hydrogen sulfide is a gas; it boils at 212.9 K (-60.2 °C) at 1 atm by its Table 2-8 row.)
  • density():
  • Liquid Phase: DIPPR Eq. 105 (Perry's Table 2-32)
  • Gas Phase: Uses the Ideal Gas Law
  • specific_heat():
  • Liquid Phase: Perry's Table 2-153, Eq. (2), a function of reduced temperature
  • Gas Phase: Ideal-gas heat capacity (Cp), DIPPR Eq. 107 (Perry's Table 2-156)
  • viscosity():
  • Liquid Phase: DIPPR Eq. 101 (Perry's Table 2-313)
  • Gas Phase: Uses Sutherland’s Law with the base class's air constants (no gas viscosity data for this component yet)
  • thermal_conductivity():
  • Liquid Phase: Polynomial function of temperature (Perry's Table 2-315)
  • Gas Phase: Vapor thermal conductivity (k), DIPPR Eq. 102 (Perry's Table 2-314)
  • vapor_pressure(): DIPPR Eq. 101 (Perry's Table 2-8).
  • enthalpy(): Enthalpy of vaporization (ΔHvap), DIPPR Eq. 106 (Perry's Table 2-150). It is 0 above the critical temperature.

Examples

from processpi.components import HydrogenSulfide
from processpi.units import *

h2s = HydrogenSulfide(temperature=Temperature(25, "C"))
print(h2s.phase())
print(h2s.density().to("kg/m3"))
print(h2s.viscosity().to("Pa·s"))
print(h2s.specific_heat().to("J/kgK"))
print(h2s.thermal_conductivity().to("W/mK"))
print(h2s.vapor_pressure().to("Pa"))
print(h2s.enthalpy().to("J/kg"))

Output

gas
1.393028 kg/m3
1.8e-05 Pa·s (dynamic)
1003.170956 J/kgK
0.014464 W/mK
2016871.032858 Pa
414334.434543 J/kg