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CO₂ Dense-Phase Pipeline Pressure Drop

Decarbonization · CCUS Transport · Supercritical Hydraulics

Dense-Phase / Supercritical CO₂ Pipeline Hydraulics
Pressure drop for CCUS transport pipelines using Peng-Robinson + Peneloux density, Fenghour-Vesovic-Wakeham viscosity, and Colebrook-White friction. Integrated over N segments to capture density variation along the pipe. Compliance checks per ASME B31.4 (CO₂ service), ISO 27913:2016, and DNV-RP-J202.

Pipeline Geometry & Flow

kg/h
mm
km

Operating Conditions

bara
°C
mm
m

Numerical

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Default 20 is adequate for ΔP < 20% of inlet. Increase to 50–100 for long lines with high pressure drop, where density varies significantly along the pipe.

📚 Learn the Theory

Dense-phase CO₂ pipeline transport: PR-Peneloux density, FVW viscosity, Colebrook hydraulics, DNV-RP-J202 velocity limits, and Span-Wagner phase behavior.

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Engineering Basis

  • Density: Peng-Robinson EOS (1976) with Peneloux volume translation (ZRA = 0.2722 for CO₂). ~3–5% vs Span-Wagner (1996) in the dense phase — for final design verify with NIST REFPROP.
  • Viscosity: Fenghour, Vesovic & Wakeham (1998), J. Phys. Chem. Ref. Data 27, 31. Accuracy ~1%.
  • Saturation curve: Wagner-form Psat from Span & Wagner (1996) — used to detect two-phase risk at the outlet.
  • Friction factor: Colebrook-White, iterated to convergence.
  • Pressure drop: Darcy-Weisbach integrated over N segments (default 20) so density variation is captured.
  • Standards: ASME B31.4 (CO₂ service), ISO 27913:2016 (CO₂ pipeline transport), DNV-RP-J202 (Design and Operation of CO₂ Pipelines).
  • Limitations: Pure CO₂ assumed (no H₂O / N₂ / O₂ / H₂S). Isothermal flow. Outlet must remain in the dense / supercritical region.

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