Post-combustion capture, rate-based over real packing

Sour gas and lean MDEA/piperazine solvent contacting in a structured-packed absorber — recovery set by real mass-transfer and reaction physics over an actual packed height.

Onda-Takeuchi-Okumoto (1968) film coefficients•Hatta-number reaction-enhancement factor•Reactive VLE via the enrtl-mdea-pz electrolyte package

Sour gas (CO2/H2S)

Lean MDEA/PZ solvent

Packed absorber

Treated gas

Rich amine

The actual dark-mode canvas: sour gas and lean MDEA/piperazine solvent contacting in a structured-packed reactive absorber — the same P&ID symbols you edit in the app.

Fork this model →

Rate-based over a real packed height, not an equilibrium-stage shortcut

Recovery is set by three coupled pieces of physics — Onda mass-transfer coefficients, a Hatta-number reaction-enhancement factor, and reactive VLE — over an actual packed height, the same physics ChemSep and Aspen RateSep are built on.

k_{L,i} = f_{\text{Onda}}(a_p, a_w, D_{L,i}, \mu_L, \rho_L, \sigma) \quad \text{(Onda-Takeuchi-Okumoto film coefficients)}

E = \frac{\sqrt{Ha}}{\tanh\sqrt{Ha}}, \qquad Ha = \frac{\sqrt{k_2\,[Amine]\,D_L}}{k_L} \quad \text{(reaction-enhancement factor)}

N_{tr,i} = k_{L,i}\,E\,a\,V_{packed}\,\bigl(c_i^* - c_{i,bulk}\bigr) \quad \text{(rate over the packed height)}

Unit ops shipped for this vertical

Rate-based packed absorber

Onda mass-transfer + reaction-enhancement + reactive VLE over a real packed height.

Run preset →

Live plant integration

Stream packed-height differential-pressure and CO2/H2S slip from your absorber's OPC-UA server into this flowsheet's twin comparison — deviations from the solved rate-based recovery are flagged automatically.

See the Digital Twin platform →