Affinity regulation of the NH + HO system by ionic liquids with molecular interaction analysis.

This work proposed using an adequate ionic liquid (IL) to weaken the affinity between NH and HO as a potential solution to the issue of high-energy consumption involved in separating NH gas from liquid HO. Two quaternary phosphonium-based ILs were selected according to an optimized regulation strategy. The regulation effects of the ILs were evaluated by the vapor-liquid equilibrium property of the NH + HO + IL systems, and were compared with the regulation effects of traditional additives.