📋 Case Study

CO₂ Capture Solvent Screening for Natural Gas Sweetening

Solvent degradation and excessive reboiler duty with conventional MDEA

🏗️ Project Overview

Offshore LNG facility in Qatar handling 20 MMSCFD sour gas

🎯 Challenge

Solvent degradation and excessive reboiler duty with conventional MDEA

🔧 Design Approach

Thermodynamic screening of blended amines (MDEA + piperazine) using eNRTL and rate-based modeling

📐 Design Diagram

AI-generated project design illustration

📐 Key Calculations

Reboiler Duty per kg CO₂

Q_reb / ṁ_CO₂

Result: 3.8 MJ/kg

Key economic driver for capture cost

CO₂ Loading Capacity

mol_CO₂ / mol_amine

Result: 0.82

Determines solvent circulation rate

📊 Results

37% lower reboiler duty, 2.1× faster absorption kinetics, extended solvent life >3 years

💡 Lessons Learned

• •Electrolyte thermodynamics essential for accurate loading predictions
• •Vapor pressure data quality directly impacted column sizing

✅ Key Takeaways

• 1Electrolyte thermodynamics essential for accurate loading predictions
• 2Vapor pressure data quality directly impacted column sizing