摘要
Dilute aqueous ammonia (NH ) process is considered as one of the alternative post-combustion carbon dioxide capture (PCC) technologies. However, the energy consumption for solvent regeneration is quite high, about 0.15–0.25 MWh/ton CO captured as equivalent work consumption. Therefore, reducing this valuable energy duty is still the major technical challenge to extensive deployment of this PCC technology. In this work, the NH -based carbon capture process was developed using the lean vapor recompression approach. A parametric study revealed that the optimum energy consumption occurs at the lean solvent characterized by NH concentration of 5.0 wt% and CO loading of 0.275 mol CO /mol NH , with the stripper and flash pressures operated at 10.50 bar and 4.17 bar, respectively. Operating under such conditions, the total work duty for a CO capture plant was substantially reduced to 0.087 MWh/ton CO captured. In this process, the need of reboiler is completely eliminated. [Figure not available: see fulltext.].