A sterically hindered amino acid promoted acid gas scrubbing process.

摘要

The present invention relates to an absorption composition comprising an alkali metal salt or hydroxide and either N-secondary butyl glycine or a specific mixture of sterically hindered monosubsituted alpha-amino acids and tertiary amino acids. The preferred promoter system comprises a mixture of N-secondary butyl glycine and N-methyl-N-secondary butyl glycine. This composition can be used for the removal of acid gas from a gaseous stream by contact herewith followed by desorption of acid gas from the absorption composition.