MaximaLabs

Oxy-combustion power cycle, real supercritical CO2

Natural gas burned in near-pure oxygen diluted by recycled supercritical CO2, expanding through a real isentropic turbine — pipeline-ready CO2 with no separate capture step.

Real near-critical CO2 compression through 30 MPaGenuine isentropic-efficiency turbine expansionPipeline-ready CO2 with no separate capture step
Near-critical CO2 makeup
CO2 compressor
Natural gas fuel
Oxy-combustor
sCO2 turbine
Trim cooler
Pipeline-ready CO2

The actual dark-mode canvas (simplified for this preview — the real example's placeholder combustor inlet is an API artifact, not real physics): natural gas burned in near-pure oxygen diluted by recycled supercritical CO2, expanded through a real turbine.

Oxy-combustion with no separate capture step

Burning in near-pure oxygen instead of air means the flue gas is already almost pure CO2 — capture is a byproduct of the cycle's own chemistry, not a bolted-on absorption unit. Honest scope: this is an open-cycle v1 (the compressor's CO2 feed and turbine exhaust aren't tied together by a recuperator yet) — it verifies the near-critical compression, oxy-combustion, and supercritical expansion chain converges and delivers net power, not a bounded commercial plant design.

CH4+2O2CO2+2H2O(oxy-combustion, near-pure O2, no N2 dilution)\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \quad \text{(oxy-combustion, near-pure O}_2\text{, no N}_2\text{ dilution)}
ηisentropic=hinhouthinhout,s(real isentropic-efficiency turbine expansion)\eta_{isentropic} = \frac{h_{in} - h_{out}}{h_{in} - h_{out,s}} \quad \text{(real isentropic-efficiency turbine expansion)}
T=310 K,P=8 MPa    (vs. Tc=304 K,Pc=7.38 MPa)compression from just above the CO2 critical pointT = 310\text{ K}, P = 8\text{ MPa} \;\; (\text{vs. } T_c = 304\text{ K}, P_c = 7.38\text{ MPa}) \Rightarrow \text{compression from just above the CO}_2\text{ critical point}

Unit ops shipped for this vertical

Compressor

Polytropic compression to pipeline/process pressure.

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Fired heater / combustor

Fuel-and-oxidant combustion duty, including oxy-combustion with a recycled-CO2 diluent.

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Turbine

Isentropic-efficiency expansion — the power-recovery counterpart to the compressor.

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Heater / cooler

Duty- or outlet-condition-specified energy-balance stage.

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Live plant integration

Stream turbine inlet temperature, compressor discharge pressure, and net power output from your cycle's OPC-UA server into this flowsheet's twin comparison — deviations from the solved expansion are flagged automatically.

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Try it yourself

  • Real near-critical CO2 compression through 30 MPa
  • Genuine isentropic-efficiency turbine expansion
  • Pipeline-ready CO2 with no separate capture step

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