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🌡️ Thermodynamics and Equations of State - Complete Guide

Application of thermodynamic principles—including phase equilibria, property estimation, and energy balances—to process design.

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Thermodynamics and Equations of State - Complete Guide

Thermodynamics is the science of heat, energy, and how they move and change form — like why steam pushes a turbine or wh...

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Knowledge Base

15 pages
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Key Concepts

Thermodynamics &Equations of StatePeng–Robinson EOS forHydrocarbon MixturesVan der Waals Equation:Derivation and LimitationsIdeal Gas Law vs.Real Gas BehaviorSecond Law and EntropyBalances for Separation UnitsFirst Law of Thermodynamicsin Process SystemsSoave–Redlich–Kwong EOSin Refinery SimulationCubic EOS ParameterEstimation (a, b, α)Phase Envelope ConstructionUsing PR-SRK Hybrid Models

Visual overview of key concepts and their relationships

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Real Projects

5 cases

Liquefied Natural Gas (LNG) Train Optimization

QatarEnergy North Field Expansion – 8 MTPA LNG train

Challenge: Excessive compressor power consumption and suboptimal refrigerant blend performa...
Ethylene Oxide Absorption ColumnMDEA–Water Solvent System | SRK+EoS ModelingEOCO₂φᵢ = CO₂:EO = 0.22Absorption Column(Packed, MDEA–H₂O)MDEA–H₂O(Low CO₂ affinity)Catalyst Poisoning(Due to residual CO₂)ΔHabs = −92 kJ/molSRK+EoS Model(CO₂/H₂O/EO solubility & enthalpy)

Ethylene Oxide Absorption Column Design

BASF ethylene oxide plant upgrade in Antwerp

Challenge: Poor CO₂ co-absorption leading to catalyst poisoning and frequent shutdowns
Supercritical CO₂ Extraction of Caffeine Low yield &inconsistent selectivity (due to inaccurate P–T–x diagrams) PC-SAFT EOS Validated vs. CO₂–caffeine–water data Extraction Window 100–150 bar, 40–60°C Solubility 12.4 g/kg CO₂ ρ(scCO₂) 682 kg/m³ P (bar) 100 → 150 T (°C) 40 → 60

Supercritical CO₂ Extraction of Caffeine

Starbucks sustainable decaffeination pilot in Colombia

Challenge: Low caffeine yield and inconsistent selectivity due to inaccurate P–T–x phase di...
Fresh FeedH₂/N₂ (3:1)Synthesis LoopNH₃/H₂/N₂/CH₄MembraneH₂ recoveryPurge StreamCH₄: 72.1% | H₂: 24.6%FeedLoop gasRecycle H₂Recovered H₂Ki = φivapiliq = 0.014(NH₃/H₂ selectivity)Challenge: 3.2% purge lossSolution: Membrane recovery

Ammonia Synthesis Loop Purge Optimization

Yara fertilizer plant modernization in Norway

Challenge: Excessive purge gas loss (3.2% of fresh feed) causing hydrogen waste and emissio...
Geofluid Input140°C, 10 kg/sPower CycleR245fa–R134aHEXChallengeη_th = 11.8% (Isobutane)ΔT_pinch = 1.8°CSolutionη_th = 14.8%ΔT_pinch = 4.2°CPR-EOS Screening21 FluidsDesign Diagram: Geothermal Working Fluid Selection | Case Study

Geothermal Power Plant Working Fluid Selection

Ormat Mammoth Pacific Unit 3 binary cycle upgrade, California

Challenge: Low net power output (<12% thermal efficiency) using isobutane due to poor match...
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Learning Path

28 lessons

Master Thermodynamics and Equations of State through a structured learning path — from fundamentals to advanced applications.

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