Experimental study and thermodynamical modelling of the solubilities of SO 2 , H 2 S and CO 2 in N-dodecylimidazole and 1,1′-[oxybis(2,1-ethanediyloxy-2,1-ethanediyl)]bis(imidazole): An evaluation of their potential application in the separation of acidic gases Huang, K.; Chen, Y.L.; Zhang, X.M.; Ma, S.L.; Wu, Y.T.; Hu, X.B.; Fluid Phase Equilibria 2014, 378, 21-33