Ammonia Escape Inhibited by NHD in the Process of Carbon Capture using Ammonia Solution

摘要

Using ammonia solution to absorb CO_2 from flue gas is expected to achieve low cost and high efficiency; however, ammonia escape during CO_2 absorption limits the application of this technique, in this work, we investigated the inhibitory effect of polyethylene glycol dimethyl ether (NHD) on ammonia escape in bubbling absorption using ammonia solution. Various NHD and ammonia concentrations on ammonia escape are considered. Results show that NHD significantly inhibits on ammonia escape and enhances removal of CO_2 at the same time as well. The amount of escaping ammonia was reduced by 24.9% when 5% NHD was used. The study has important implications for application of the ammonia absorption method in carbon capture.