Cyclic process Process Flowsheets & Simulations
Explore 2 validated, solved Cyclic process simulation flowsheets in MaximaLabs — real components: h2, co2, n2, oxygen, argon. Open any one directly in your browser.
Solved via: PENG-ROBINSON.
Pressure Swing Adsorption — H2 purification
A 5 bar shift-gas feed (H₂/CO₂, the dominant impurity leaving a steam-methane-reforming shift reactor) is purified across a real cyclic 2-bed PSA unit: while one bed adsorbs CO₂ at high pressure (delivering H₂-rich product), the other regenerates at low pressure, swept countercurrently by a slipstream of that product to desorb CO₂ out the feed end as tail gas — the genuine Skarstrom-cycle mechanism, not a fixed-recovery shortcut. The solver runs the real cyclic transient (tanks-in-series bed discretization + linear-driving-force adsorption kinetics toward the same competitive-Langmuir isotherm uses) to a periodic steady state.
4 unit ops • PENG-ROBINSON
225 0
View & openOn-site oxygen: multi-bed vacuum pressure swing adsorption (VPSA)
Medical- / green-steel-grade oxygen generated on site from air by a 4-bed vacuum pressure swing adsorption unit over an N₂-selective zeolite (LiX/13X). This uses the native VPSA unit op — the proven 2-bed Skarstrom engine generalized to N beds with pressure-equalization steps and sub-atmospheric evacuation: nitrogen is adsorbed while oxygen passes as the light product, then each bed is pulled to a vacuum to desorb the nitrogen tail gas. The solver runs the real cyclic transient (tanks-in-series bed discretization + linear-driving-force kinetics + inter-bed equalization) to a periodic steady state — the transient dynamic equilibrium legacy steady-state simulators cannot capture without a separate dynamic license.
4 unit ops • PENG-ROBINSON
223 0
View & open