Simulation and Experimental System Terner Aseton-Butanol-Ethanol with Batch Distillation
Ni Ketut Sari
Departement of Chemical Engineering, Industrial Technologi Faculty UPN ”Veteran” East Java
- 1. INTRODUCTION
In the chemical industry, the fermentation process is one way to get a chemical compound with the help of microorganisms, fermentation products enter the next stage of separation. At this stage it is very important to produce a product with a certain purity, one of the tools commonly used in the separation process is a batch distillation column. Separation process in the industry generally and the separation of multicomponent separation rarely binary, therefore it is important to review the multicomponent batch distillation. Design of multi-component batch distillation is generally obtained by performing simulations, in order to obtain simulation results are close to the actual state of the required thermodynamic data are accurate.
In the process of separation, thermodynamic data of the most dominant influence on the process performance is the equilibrium phase. One of the modern thermodynamic correlation in mempersentasikan behavior is not ideal mixture UNIQUAC equation, the approximate equilibrium ternary and quaternary systems can be done only based on experimental data of binary systems. Activity coefficient models with UNIQUAC equation was developed from a binary mixture, and has advantages for applications in multi-component mixture system because it only requires a binary parameter (does not require additional parameters). But the loss model does not always succeed in predicting the equilibrium multi-component system that shows a mixture which is not ideal especially for mixtures that have a spouse with limited solubility such as butanol-water. To overcome these measurement data needed to accurately balance the binary system and model parameters estimation of activity coefficient models so that these parameters can be used to estimate the vapor-liquid equilibrium multi-component systems accurately.
From the simulation results obtained ternary system, to see the profile of the movement of the composition of liquida on the bottom then drawn in the form of residue curve maps. From the residue curve maps the ternary system can be known whether they form a ternary mixture zeotropik or azeotropic mixtures. Of the azeotropic mixture can be divided into homogeneous azeotropic mixtures and heterogeneous azeotropic mixtures. For homogeneous azeotropic mixture after separation of the results obtained form a single phase and azeotropnya point does not lie in Liquid-Liquid-Equilibrium (Mademoiselle), while for heterogeneous azeotropic mixture after separation of the results obtained form more than one phase and azeotropnya point is at Mademoiselle. Then further developed for multi-component systems, namely in the form of residue curve maps of homogeneous and heterogeneous azeotropic mixture, the movement of the composition profile in the residue is formed liquida zeotropik or azeotropic mixtures. Ternary systems such as isopropanol-water-benzene to form a pseudo-homogeneous azeotropic mixtures have been studied by Pham and Doherty (1990). Ternary systems such as chloroform-benzene-acetone (Fidkowski et al. 1993), acetone-heptane-benzene (Henley and Seader, 1998), acetone-water-metyl ethyl ketone (Villiers et al. 2002) and isopropanol-methyl cyclohexane-toluene (Egbewatt and Fletcher 2003) to form a homogeneous azeotropic mixtures. Other ternary systems that form the heterogeneous azeotropic mixtures such as ethanol-water-benzene (Henley and Seader, 1998), ethanol-water-toluene (Henley and Seader, 1998). Other ternary systems such as nitrogen-argon-oxygen mixture without forming azeotropic or zeotropik, octane-2-ethoxy ethanol to form ethyl benzene azeotropic binary system, acetone-chloroform-methanol to form binary and ternary azeotropic system (Widagdo and Seider 1996). From the results of previous research, no one has made a map of residue curves for ternary mixtures ABE.
From the residue curve maps obtained and validated, the validation of the topological relations. To validate the topological relations using the equation that already exist in the literature (Henley and Seader, 1998). To determine whether the program listing the ternary system simulation is generally applicable, then validated based on data from the literature. Many ternary systems that already exist in the literature or journals that can be used for validation ABE ternary system, one of the ternary system used is a mixture that forms the ternary system zeotropik the MEP. More