Calcination Process Flowsheets & Simulations
Explore 2 validated, solved Calcination simulation flowsheets in MaximaLabs — real components: n2, oxygen, co2, water, calcium_carbonate, calcium_oxide. Open any one directly in your browser.
Solved via: COOLPROP, NRTL.
Direct air capture with solid-sorbent calcination + CO2 liquefaction
A Carbon Engineering-style DAC train: a fan draws ambient air (400 ppm CO2) through a liquid-KOH contactor (a fixed-recovery separator — the same simplification the existing carbon-capture example uses for chemical absorption, since no CO2-KOH electrolyte package exists) capturing ~75% of the CO2. The captured CO2 is causticized and precipitated into CaCO3 pellets by the real (unmodeled-in-detail) KOH/Ca(OH)2 loop — represented here as a matched pellet feed sized to the captured CO2 rate, since the generic reactor unit op can't itself produce a solid product (only a rotary kiln's decomposition path can, which is exactly what's used next). Those pellets calcine at ~977 degC in an indirectly-heated rotary kiln (real Arrhenius decomposition kinetics, Sullivan-Maynard-Valentine residence time), releasing pure CO2 that's compressed to ~20 atm and chilled to 250 K — above the real Span-Wagner CO2 saturation pressure at that temperature, so the solved outlet stream is genuine subcooled LIQUID CO2 (not just dense-phase pipeline gas) — while the CaO leaves for slaking and reuse (the lime side of the closed loop, out of scope for the same reason as the causticization step). Run the Carbon Footprint report on this example for the real Scope 1/2/3 CO2e + carbon-tax liability breakdown already built into this codebase's report generator.
12 unit ops • COOLPROP
24 1
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
24 2
View & open