ABSORBING LIQUID FOR CO2, H2S, OR BOTH, AND DEVICE AND METHOD FOR REMOVING CO2, H2S, OR BOTH

摘要

An absorbing liquid according to the present invention absorbs CO₂, H₂S, or both present in a gas, and includes, as components, a (a) secondary linear monoamine, a (b) tertiary linear monoamine, and a (c) secondary cyclic diamine, with the concentration of the (a) secondary linear monoamine being more than 30 wt% to less than 45 wt% and the concentration of the (b) tertiary linear monoamine being more than 15 wt% to less than 30 wt%. As a result, the present invention achieves an absorbing liquid in which the ability to absorb CO₂, H₂S, or both is excellent and dissipation of the absorbed CO₂ or H₂S when reclaiming the absorbing liquid is excellent, and it is possible to reduce the amount of water vapor from a reboiler 26 used when reclaiming the absorbing liquid in a CO₂ recovery device 12.