Comparison of equilibrium stage and nonequilibrium stage models for reactive distillation

Optimization of coproduction of ethyl acetate and n-butyl acetate by reactive distillation

“…[18,19]. The equilibrium stage model has been successfully used for reactive distillation column simulation [20][21][22][23], so a rigorous equilibrium stage model containing the mass balance, phase equilibrium, summation, and energy balance equations is used to describe the multistage vapor-liquid separation in the reactive distillation. In the simulation, the universal quasi-chemical activity coefficient model is used for the n-BuAc system and the non-random twoliquid activity coefficient model is used for the EtAc system [9].…”

Synthesis of dimethyl ether (DME) by catalytic distillation

“…The catalytic distillation column is divided into three sections: a central reaction zone where the products are continuously removed from the reaction zone, and thus the reaction equilibrium limitation should be broken; an upper rectification zone where the DME product as light component is purified at the top; and a lower stripping zone where water or the mixture of water and methanol as heavy component is separated at the bottom. The model is based on the assumption that both the chemical and phase are in equilibrium at every stage of the reaction zone and the phase is in equilibrium at every nonreactive stage above and below the reaction zone (Baur et al, 2000;Taylor and Krishna, 2000;Smejkal et al, 2001). As for the fixed-bed reactor, a simpler model RGibbs module was used.…”

Extractive Distillation: A Review

“…The model equations of NEQ stage for extractive distillation are similar to those for reaction distillation (Baur et al, 2000(Baur et al, , 2001Higler et al, 1999a,b;Lei et al, 2003;Taylor and Krishna, 2000). Though sophisticated NEQ stage model is available readily, detailed information on the hydrodynamics and mass transfer parameters for the various hardware configurations is woefully lacking in the open reference.…”