University of Texas System

John Cullinane

Gary T Rochelle

Gary Rochelle

Novel solvents and methods of use for the removal of COfrom flue gas, natural gas, hydrogen gas, synthesis gas, and other process and waste gas streams are provided. The solvent contains an alkali salt such as potassium carbonate and a polyamine such as piperazine (PZ) where the polyamine concentration is at least 1.5 equivalents/Kg HO and the alkali salt concentration is at least 0.5 equivalents/Kg HO. The preferred alkali salt/polyamine ratio is from approximately 1:2 to 2:1, and no additional alcohol is required for solubilizing the PZ. This chemical solvent and method of use provides efficient and effective removal of COfrom gaseous streams and other sources.

Polyamine/alkali salt blends for carbon dioxide removal from gas streams

Novel solvents and methods of use for the removal of COfrom flue gas, natural gas, hydrogen gas, synthesis gas, and other process and waste gas streams are provided. The solvent contains an alkali salt such as potassium carbonate and a polyamine such as piperazine (PZ) where the polyamine concentration is at least 1.5 equivalents/Kg HO and the alkali salt concentration is at least 0.5 equivalents/Kg HO. The preferred alkali salt/polyamine ratio is from approximately 1:2 to 2:1, and no additional alcohol is required for solubilizng the PZ. This chemical solvent and method of use provides efficient and effective removal of COfrom gaseous streams and other sources.

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Houston, TX, United States of America

John Cullinane