Optimization of hybrid ethanol dehydration systems

A semicontinuous approach for heterogeneous azeotropic distillation processes

“…A variety of algorithms have been used by previous researchers to optimize the design of azeotropic distillation columns (Menezes and Cataluna, 2008;Pommier et al, 2008;Szitkai et al, 2002). In this study, a particle swarm optimization (PSO) algorithm was used.…”

Optimization of brewer’s yeast spray drying process

“…Therefore the relationship was obtained by fitting the simulator results to RSM models. In a similar way that Szitkai et al (2002) used to pervaporate membrane networks model. Three new variables were added to the optimization problem: product and air flow, and air input temperature.…”

“…Nevertheless, RSM may be applied to extract from use improved on mechanistic models to when these models are mathematically complex. For example, (Szitkai, Lelkes, Rev, & Fonyo, 2002) applied a regression model based on simulation results of pervaporation membrane networks to optimize ethanol dehydration systems. In the case of spray drying several mechanistic models representing the process dynamic have been proposed (Palencia, Nava, Herman, Rodríguez-Jimenes, & García-Alvarado, 2002;Pérez-Correa, 1995).…”

Process intensification in the textile industry: the role of membrane technology

“…A typical hybrid process is the coupling of pervaporation (or vapor permeation) and distillation, where a pervaporation unit is combined with a distillation column to achieve facilitated separation near the azeotropic composition of the mixture (Fahmy et al, 2001;Lipnizki et al, 1999). Dehydration of ethanol is a typical application; a 12% reduction in total annual costs is claimed, which may even be further optimized (Szitkai et al, 2002). Other examples of hybrid processes in the chemical industry are the combination of pervaporation with liquid-liquid extractors or with chemical reactors; these represent another type of hybrid process, where the membrane is used to shift the reaction equilibrium to a higher yield by the selective removal of the reaction products (David et al, 1991).…”