📋 Case Study

Ammonia Synthesis Loop Optimization at Fertilizer Plant

High compressor energy consumption and low single-pass conversion (<15%)

🏗️ Project Overview

1,200 MTPD ammonia plant in Iowa, USA

🎯 Challenge

High compressor energy consumption and low single-pass conversion (<15%)

🔧 Design Approach

Recycle ratio adjustment + interstage cooling integration using pinch analysis

📐 Design Diagram

AI-generated project design illustration

📐 Key Calculations

Single-Pass Conversion

(NH₃_out − NH₃_in)/N₂_in × stoich_factor

Result: 18.2%

Directly impacts recycle load and compression work

Compressor Isentropic Work

ṁ × h_isen_out − h_in

Result: 42.7 MW

Primary energy consumer in loop

📊 Results

22% reduction in compressor power, 9.4% increase in net production, ROI < 2.1 years

💡 Lessons Learned

• •Accurate EOS selection (SRK) was critical for high-pressure H₂/N₂/CH₄ mixture
• •Real-time exergy monitoring enabled dynamic optimization

✅ Key Takeaways

• 1Accurate EOS selection (SRK) was critical for high-pressure H₂/N₂/CH₄ mixture
• 2Real-time exergy monitoring enabled dynamic optimization