Technical-energy-economic multi-objective optimization of ionic
liquid-based CO2 /NH3 separation from melamine tail gas
Abstract
Melamine production is known to produce tail gas with a significant
amount of CO2 and NH3. Ionic liquid as a green and excellent solvent is
to be used for separating melamine tail gas. This paper aims to present
a detailed multi-objective optimization (MOO) for the CO2/NH3 separation
of the tail gas by ionic liquid (IL) in technical-energy-economic
evaluation. Functional IL ([Bim][NTf2]) was selected, the ionic
liquid-based process was designed, and process performances were
investigated by process simulation and optimization. According to the
optimization results, specific cases with different objective functions
were chosen, and the relationship between key parameters was analyzed.
The results showed that the ionic liquid-based technology could realize
a better performance regarding the technical-energy-economic than the
base case. Deeper analyses with the influence of operation parameters
with evaluation index were carried out, thus providing support to the
industrial application of the new separation technology.