Effect of Operating Parameters on Ethanol–Water Vacuum Separation in an Ethanol Dehydration Apparatus and Process Modeling with ANN

Abstract Bioethanol has been found to be a suitable substitute for gasoline in internal combustion engines. It could be used either in an undiluted form or blended with gasoline. To blend the ethanol and gasoline, the water content of ethanol should reach 0.5% or less. In the present research work, 3A Zeolite was used as an absorbent with vacuum distillation. The effects of the operating parameters such as temperature, vacuum pressure and vapor flow rate on ethanol–water separation were investigated. Final ethanol concentration was obtained at the end of every run as well as the concentration of outlet ethanol. Both linear regression and ANN design were used to determine the best fit for two final parameters. The optimum condition was obtained at 0.4 bar vacuum pressure and 20 l/min ethanol–water vapor flow rate. ANN model is more qualified to the simulation of outspread data while the linear regression is not. L10L10 mode and L5T10 mode provide the best results for final concentration and total time, respectively. The Trainlm Algorithm like the previous research training algorithm is the best.

[1]  Daniel Graupe,et al.  Principles of Artificial Neural Networks , 2018, Advanced Series in Circuits and Systems.

[2]  Iván D. Gil,et al.  Separation of ethanol and water by extractive distillation with salt and solvent as entrainer: process simulation , 2008 .

[3]  Tejraj M. Aminabhavi,et al.  Novel sodium alginate-poly(N-isopropylacrylamide) semi-interpenetrating polymer network membranes for pervaporation separation of water + ethanol mixtures , 2007 .

[4]  F. Banat,et al.  Separation of Ethanol–Water Mixtures Using Molecular Sieves and Biobased Adsorbents , 2004 .

[5]  Xijun Hu,et al.  Simulation and analysis of pressure swing adsorption: ethanol drying process by the electrical analogue , 2003 .

[6]  J. C. Gubulin,et al.  Ethanol-Water Separation in the PSA Process , 2002 .

[7]  P. Sharratt,et al.  Zeolite A membranes for use in alcohol/water separations. Part I: Experimental investigation , 2000 .

[8]  P. Demertzis,et al.  Effect of adsorbent particle size and temperature on water-ethanol separation by starchy and cellulosic substrates , 1998 .

[9]  Martin A. Riedmiller,et al.  A direct adaptive method for faster backpropagation learning: the RPROP algorithm , 1993, IEEE International Conference on Neural Networks.

[10]  M. F. Møller.  A Scaled Conjugate Gradient Algorithm for Fast Supervised Learning , 1990 .

[11]  Gholamhassan Najafi,et al.  Application of artificial neural networks for the prediction of performance and exhaust emissions in SI engine using ethanol- gasoline blends , 2010 .

[12]  Pruksathor.  Production of Pure Ethanol from Azeotropic Solution by Pressure Swing Adsorption , 2009 .