Feasible Separation Modes for Various Reactive Distillation Systems

Abstract

The feasibility of steady states of continuous reactive distillation processes is discussed by applying the theory of static analysis (SA). The generality of this approach is proved by applying several industrial examples, all of which have different reaction schemes and thermodynamical properties. For each example process, the entire feed composition region is divided into several subregions, each of which has similar characteristics for the product composition and the column structure. The information derived by this analysis can be used effectively for the selection of the desirable feed composition and column configurations. The results of various examples indicate that the SA is a very convenient tool that provides an answer to the question of feasibility and provides hints for an early stage of design.

On-line Optimizing Control for a Class of Batch Reactive Distillation Columns

“…It must be pointed out that, basically, the nominal closed-loop optimal motion (Figure 2) with analytic SF passive nonlinear controller resembles the ones drawn before with open-loop optimization (Mujtaba and Macchietto, 1997;Giessler et al, 2001). That it is not possible to obtain pure product in this esterification case, because azeotrope boiling points are slightly lower than the desired product (ethyl acetate) is a known fact from previous studies (Giessler et al 1999).…”

“…To test the proposed operation-control design approach, the esterification reaction: ethanol (A) + acetic acid (B) H+ ↔ ethyl acetate (C) + water (D), catalyzed with sulphuric acid, was chosen as application example via simulations, with the understanding that the optimal operation part of our problem has been studied before with open-loop optimization (Mujtaba and Macchietto, 1997;Giessler et al, 2001). The kinetics and the thermodynamic model and parameters were taken from Georgiadis et al (2002) and Giessler et al (1999), respectively. The column model describes an experimental glass batch column (Fernández and Alvarez, 2007) with N = 10 trays, minimum-maximum heat duty (Q -, Q + ) = (0.6, 2) kW, hydraulic parameter set (a η , b η , c η ) = (3.0, 0.2, 1.5), 1.5 L reboiler volume, and 0.02 L tray volume.…”

Feasibility analysis, synthesis, and design of reactive distillation processes: A focus on double‐feed processes

“…In that case, for the feasibility analysis of hybrid processes, the static analysis introduced by Giessler et al16–18 is applied.…”

Preliminary Design of Reactive Distillation Columns

“…Specific approaches were developed for RD processes: the static analysis introduced by Giessler et al (1999aGiessler et al ( , 1999bGiessler et al ( , 2001) and the phenomena based analysis developed by Hauan et al (2000). As reported in Table 1, these different approaches only address one or two out of the four steps listed in Figure 1.…”