申请人:Rochelle Gary T.
公开号:US20120043501A1
公开(公告)日:2012-02-23
Novel solvents and methods of use for the removal of CO
2
from 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 H
2
O and the alkali salt concentration is at least 0.5 equivalents/Kg H
2
O. 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 CO
2
from gaseous streams and other sources.