Evaluation of a Third Generation Single-Component Water-Lean Diamine Solvent for Post-Combustion CO2 Capture

This study describes a comprehensive evaluation of a recently developed water-lean diamine solvent, N1-(2-ethoxyethyl)-N2, N2-diisopropylethane-1,2-diamine (2-EEDIPE-DA), to probe its potential post-combustion CO2capture performance. This evaluation includes(1) fundamental sorption characterization such as vapor-liquid equilibria, sorption kinetics, andviscosity impacts; (2) continuous capture characterization using a laboratory-scaleflow systemusing aflue gas simulant; and (3) technoeconomic analysis of the capture process at theindustrial scale with projections for critical capture performance metrics. Using this evaluation,we compare the performance of 2-EEDIPEDA to our current leading water-lean amine-basedsolvent, 2-EEMPA, using the same baseline process plant configuration/pricing. From thiscomparison, we observe a lower total cost of capture as low as $46.8/tonne CO2with 2-EEDIPEDA (20% cheaper than Cansolv), as a direct result of solvent chemistry tuning leading to notable cost savings

Automated summary

This study provides a comprehensive evaluation of a recently developed water-lean diamine solvent for CO2 capture. The evaluation includes fundamental sorption characterization, continuous capture characterization, and technoeconomic analysis. The results show that the new solvent has a lower capture cost compared to the current leading solvent.