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Ralph H. Weiland, Nathan A. Hatcher & Jaime L. Nava, Optimized Gas Treating, Inc., USA
This paper benchmarks the performance of a conventionally-configured 3,000 tonne/day CO2 capture plant using NaGly and MEA-promoted KDiMGly against the standard, 30 wt% MEA. The results are striking—the regeneration energy required appears to be only slightly more than half that required for MEA in an identical plant. Furthermore, solvent rates are considerably lower. Combined with a neutralized amino acid’s complete lack of volatility and its natural resistance to oxidation and thermal degradation, this finding puts caustic-neutralized amino acids into a class of solvents of great potential commercial interest. The paper provides a detailed explanation of how and why a process based on NaGly or MEA-promoted KDiMGly is likely to perform well.