Later on RD was categorized as hybrid and non-hybrid columns. However in 1980, with the advent of reactive distillation technology, Eastman Company tentatively carried out synthesis of high-purity methyl acetate. Reactive distillation, which uses heterogeneous catalysts known as catalytic distillation, was firstly considered for RD, but it then remained uninvestigated and lacked research interests until the 1980s. Industrial application of reactive distillation The schematic diagram of reactive distillation column is shown in Figure 1.Ģ. The saving in total energy cost is due to exothermic nature of many chemical reactions which in turn are beneficial in providing heat for separation of components simultaneously. This kind of integration is also beneficial in reducing pump cost and other instrumentation cost.
In the case of reactive distillation, total capital cost is reduced due to two combined process steps held in the single unit. In view of all these constraints, reactive distillation emerged as a novel technique of process intensification in which reaction and separation of product take place simultaneously in a single column. Specifically the conversion limits for reversible reactions are difficult to overcome toward highest purity of product because once the equilibrium is achieved in the system, no more reactant will be converted into products. There are various constraints on this type of processing like more space required for the installation of the unit, higher cost, more energy input requirement, and reduced selectivity. required a reactor followed by separator such as a distillation unit to separate the required product from other constituents on the basis of relative volatility. Manufacturing of various chemicals like esters, ethers, cumene, petroleum processing unit, etc.
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The optimization and sensitivity analysis was carried out using Aspen Plus process simulation software.Ĭhemical engineering deals with the conversion of raw material into products via a chemical unit process or unit operations. The result obtained was observed with change in various variables including the reflux ratio (RR), distillate-to-feed (D/F) ratio, and bottom-to-feed (B/F) ratio with respect to product composition. A strong acidic ion exchange catalyst, Amberlyst-15, was used to enhance the rate of heterogeneous esterification reaction. The synthesis of methyl acetate was carried out in a packed RDC by catalytic esterification using acetic acid and methanol as reactants in a pilot-scale experimental setup. The results are compared for both experimental and simulation studies. Methyl acetate production via reactive distillation is chosen as a case study. In this chapter, modeling, simulation, and optimization of reactive distillation are presented. This makes it a highly complex process because many parameters involved in both reaction and separation are interactive in nature. Reactive distillation is a new technique of combination of both reaction and separation in a single unit beneficial for equilibrium-limited reactions and also cost-effective.
Chemical process industries deal with production which further utilizes reaction followed by separation of the reaction mixtures.
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