Lanran CCUS Application Solutions Series | Case VI
Case: A Refining & Petrochemical Amine Purification Project in Zhejiang
Background: This refinery operates one of Asia’s largest co-exes (40 million t/a refining capacity). Its MDEA (Methyldiethanolamine) solvent system is used for H₂S and CO₂ removal from process gases. Originally, the company used anion resin beds for HSS removal. However, resin replacement was costly, suffered from sodium ion leakage, and could not achieve stable low-HSS operation.
Lanran Solution: In 2024, the refinery replaced its resin system with Lanran’s ED416-250 electrodialysis stacks. Amine solvent circulates through the ED stack. Under a DC electric field, harmful HSS anions are selectively removed. Solvent is regenerated without chemical regenerants. The target was to reduce HSS from 6% → 0.5%.
Technology Advantages
✔ Superior to resin-based purification – lower cost, better performance.
✔ Maintains long-term solvent stability.
✔ Provides a robust solution for large-scale refineries.
Results & Impact
By March 2025, both East and West refining zones achieved stable operation with HSS at 0.5%.
After six months, solvent quality remains stable at the same level.
Energy consumption and chemical costs have been significantly reduced.
