Carbon capture Process Flowsheets & Simulations
Explore 2 validated, solved Carbon capture simulation flowsheets in MaximaLabs — real components: co2, methane, oxygen, water, argon, calcium_carbonate. Open any one directly in your browser.
Solved via: PENG-ROBINSON, NRTL.
sCO2 Allam-Fetvedt oxy-combustion power cycle
Natural gas burns in near-pure oxygen, diluted by a large recycled supercritical-CO2 flow instead of air's nitrogen — the oxy-combustion, near-critical-CO2 cycle that yields pipeline-ready CO2 with no separate capture step. Main compressor takes CO2 from just above its critical point (310 K, 8 MPa vs. Tc=304 K/Pc=7.38 MPa) to 30 MPa; the combined CO2+combustion-product stream expands through a real isentropic-efficiency turbine, still supercritical throughout. Honesty notes: (1) this is an open-cycle v1, not the fully closed recuperated loop — the compressor's CO2 feed and the turbine's exhaust aren't tied together via a recuperator/recompression recycle yet (a stated follow-up), so read this as 'does the near-critical compression + oxy-combustion + supercritical expansion chain converge and deliver net power', not a bounded plant design. (2) The combustor's ambient_temperature param is reused as the recycled-CO2 inlet temperature (a naming artifact of fired_heater.py's air-furnace origins), not true ambient. (3) Turbine-inlet temperature here (~760 K) is lower than a commercial Allam design's ~1150 degC — that gap is exactly what the missing recuperator would close by preheating the recycle CO2 before combustion.
10 unit ops • PENG-ROBINSON
21 0
View & openCement kiln calcination + CO2 liquefaction
Preheated limestone (CaCO3) enters an indirectly-heated rotary kiln that calcines it toward CaO, releasing a CO2-rich off-gas; the gas is knocked free of moisture, then compressed and cooled to liquefy the CO2 for transport/storage. Honesty notes: (1) oxy-fuel combustion itself isn't modeled — this codebase's fired-heater unit hardcodes standard dry-air combustion stoichiometry, so the kiln's heat input is represented the way this solver's rotary-kiln model actually works, an indirect utility-temperature wall duty, not a simulated oxy-fuel flame; (2) the calcination conversion shown (~21%) is the real, kinetically-limited result of this model's validated Arrhenius parameters at this residence time/temperature, not a claim of complete calcination — a real cement plant's preheater-tower-plus-kiln train achieves far higher calcination degree than one rotary-kiln unit alone models here; (3) CO2 must be compressed above roughly 5.2 atm before it can be liquefied by cooling at all (it has no liquid phase at 1 atm at any temperature), which the compressor stage here reflects.
11 unit ops • NRTL
20 2
View & open