The determination of the existence and composition of homogeneous azeotropes is important both from both theoretical and practical standpoints in the analysis of phase behavior and in the synthesis and design of separation systems. We present here a new method for reliably locating any and all homogeneous azeotropes for multicomponent mixtures. The method also veri es the nonexistence of homoge...

The determination of the existence and composition of homogeneous azeotropes is important both from both theoretical and practical standpoints in the analysis of phase behavior and in the synthesis and design of separation systems. We present here a new method for reliably locating any and all homogeneous azeotropes for multicomponent mixtures. The method also veriies the nonexistence of homoge...

The determination of the existence and composition of reactive azeotropes is important from both theoretical and practical standpoints in the analysis of combined reaction and phase equilibrium and in the synthesis and design of reactive separation systems. We present here a new method for reliably locating, from given thermodynamic models, any and all reactive azeotropes for multicomponent mix...

A novel approach for enclosing all heterogeneous and reactive azeotropes in multi-component mixtures is presented. The thermodynamic conditions for azeotropy form a system of nonlinear equations. A deterministic global optimization approach is introduced in which the global optimization problem may contain multiple global minima and there is a one-to-one correspondence between each global minim...

{Recent advances in global optimization for process synthesis, design and control are discussed. After a review of the chemical engineering contributions, we focus on the enclosure of all solutions of nonlinear constrained systems of equations. Important theoretical results are presented accompanied with computational studies on the enclosure of multiple steady states and all homogeneous azeotr...

The Refrigerant RS02, an azeotrope of CFCllS and HCFC22, is an important refrigerant in commercial refrigeration, especially for low temperature applications using single stage compressors. current users of R502 are faced with an earlier than ~nticipated phase-out and are under great pressure to find suitable alternates for retrofit and o.E.M. (new) applications. Single components like HCFC12S,...

Abstract In this study seven adsorption azeotropes involving binary systems and zeolite-based adsorbents were systematically investigated. Pure component isotherms mixed-gas data taken from published literature except for the benzene–propene system on silicalite, which is newly presented in work using molecular simulations. Experimental adsorbed phase composition total amount of azeotropic comp...