Design and control of reactive dividing-wall column for the synthesis of diethyl carbonate

Abstract In this study, dimethyl carbonate (DMC) and ethanol (EtOH) are used to synthesize diethyl carbonate (DEC) by transesterification. In order to have sufficient activity for application in reactive distillation (RD) column, homogeneous catalyst sodium ethoxide is used and can be recycled to reuse. Due to the presence of azeotrope in the reaction system, feed location is discussed and an unusual feed location is used: the heavier DMC feed should be located in the middle of the reaction section, while the lighter EtOH feed should be located at the top part of the reaction section. A conventional RD process is developed and optimized by minimizing the total annual cost (TAC). A reactive dividing-wall column (R-DWC) is also designed with the same number trays, feed conditions and product specifications. The results show that the R-DWC can save 18.7% of the energy consumption and 13.9% of the TAC compared with the conventional RD process. The control structure for the R-DWC is investigated to control the product composition. The proposed control structure can maintain the product purities close to the set point when disturbances in the feed flow rate and feed composition are introduced.

[1]  W. Luyben.  Distillation Design and Control Using Aspen Simulation , 2006 .

[2]  San-Jang Wang,et al.  Design and Control of a Thermally Coupled Reactive Distillation Process Synthesizing Diethyl Carbonate , 2014 .

[3]  I. Chien,et al.  Design and Control of Thermally Coupled Reactive Distillation for the Production of Isopropyl Acetate , 2012 .

[4]  Renanto Handogo,et al.  Design and control of reactive-distillation process for the production of diethyl carbonate via two consecutive trans-esterification reactions , 2011 .

[5]  Sunwon Park,et al.  Two-Point Temperature Control Structure Selection for Dividing-Wall Distillation Columns , 2012 .

[6]  X. Zhai,et al.  Synthesis of diethyl carbonate by catalytic alcoholysis of urea , 2007 .

[7]  J. Segovia-Hernández,et al.  Reactive dividing wall distillation columns: Simulation and implementation in a pilot plant☆ , 2009 .

[8]  Wen-de Xiao,et al.  Isobaric vapor–liquid equilibria of alkyl carbonates with alcohols , 2000 .

[9]  O. Ryll,et al.  Methyl Acetate Hydrolysis in a Reactive Divided Wall Column , 2007 .

[10]  A. Bell,et al.  An investigation of carbon-supported CuCl2/PdCl2 catalysts for diethyl carbonate synthesis , 2009 .

[11]  Kejin Huang,et al.  Operation of Dividing-Wall Distillation Columns. 2. A Double Temperature Difference Control Scheme , 2013 .

[12]  Eugeny Y. Kenig,et al.  Dividing wall columns in chemical process industry: A review on current activities , 2011 .

[13]  J. Long,et al.  A solid lithium electrolyte via addition of lithium isopropoxide to a metal-organic framework with open metal sites. , 2011, Journal of the American Chemical Society.

[14]  Wen-De Xiao,et al.  A reactive distillation process for a cascade and azeotropic reaction system: Carbonylation of ethanol with dimethyl carbonate , 2001 .

[15]  Juan Gabriel Segovia Hernández,et al.  Analysis of Dynamic Performance for Multiple Dividing Wall Distillation Columns , 2013 .

[16]  A. Górak,et al.  Transesterification of Dimethyl Carbonate with Ethanol To Form Ethyl Methyl Carbonate and Diethyl Carbonate: A Comprehensive Study on Chemical Equilibrium and Reaction Kinetics , 2011 .

[17]  Costin Sorin Bildea,et al.  Reactive DWC leading the way to FAME and fortune , 2012 .

[18]  P. Lutze,et al.  Process analysis and economic optimization of intensified process alternatives for simultaneous industrial scale production of dimethyl carbonate and propylene glycol , 2015 .

[19]  K. Sundmacher,et al.  Reactive distillation : status and future directions , 2003 .

[21]  M. Seehra,et al.  Characterization of CuCl2/PdCl2/Activated Carbon Catalysts for the Synthesis of Diethyl Carbonate , 2002 .

[22]  David Shan-Hill Wong,et al.  Steady-state design of thermally coupled reactive distillation process for the synthesis of diphenyl carbonate , 2013, Comput. Chem. Eng..

[23]  Eugeny Y. Kenig,et al.  Rate-based analysis of reactive distillation sequences with different degrees of integration , 2007 .

[24]  H. Meuzelaar,et al.  Production of Diethyl Carbonate from Ethanol and Carbon Monoxide over a Heterogeneous Catalyst , 2002 .

[25]  J. Canosa,et al.  Vapour–liquid equilibria of dimethyl carbonate with linear alcohols and estimation of interaction parameters for the UNIFAC and ASOG method , 2002 .

[26]  Wei Wang,et al.  Crystal structures, acid–base properties, and reactivities of CexZr1−xO2 catalysts , 2009 .

[27]  I-Lung Chien,et al.  Critical Assessment of the Energy-Saving Potential of an Extractive Dividing-Wall Column , 2013 .

[28]  Ljubica Matijašević,et al.  Dividing wall column—A breakthrough towards sustainable distilling , 2010 .

[29]  Xigang Yuan,et al.  Selective hydrogenation and separation of C3 stream by thermally coupled reactive distillation , 2015 .

[30]  G. Kaibel,et al.  Dividing wall columns: Fundamentals and recent advances , 2010 .

[31]  Jae W. Lee,et al.  Graphical Design of Integrated Reaction and Distillation in Dividing Wall Columns , 2015 .

[32]  Anton A. Kiss,et al.  Innovative dimethyl ether synthesis in a reactive dividing-wall column , 2012, Comput. Chem. Eng..

[33]  Cheng-Liang Chen,et al.  Design and Control of Reactive Distillation System for Esterification of Levulinic Acid and n-Butanol , 2015 .

[34]  Alvaro Orjuela,et al.  Comparison of different reactive distillation schemes for ethyl acetate production using sustainability indicators , 2015 .

[35]  Xinbin Ma,et al.  Study on Wacker-type catalysts for catalytic synthesis of diethyl carbonate from ethyl nitrite route , 2007 .

[36]  William L. Luyben,et al.  Reactive Distillation Design and Control , 2008 .

[37]  Felicia Januarlia Novita,et al.  Self-heat recuperative dividing wall column for enhancing the energy efficiency of the reactive distillation process in the formic acid production process , 2015 .

[38]  S. Hosseini,et al.  Design and simulation of a reactive distillation process to produce high-purity ethyl acetate , 2013 .

[39]  Cheng-Ching Yu,et al.  Plantwide Design of Transesterification Reactive Distillation to Co-Generate Ethyl Acetate and n-Butanol , 2010 .

[40]  Lanyi Sun,et al.  Shortcut Method for the Design of Reactive Dividing Wall Column , 2014 .

[41]  Dengchao An,et al.  Design and control of reactive dividing-wall column for the production of methyl acetate , 2015 .

[42]  William L. Luyben,et al.  New Control Structure for Divided-Wall Columns , 2009 .

[43]  San-Jang Wang,et al.  Optimal design of mixed acid esterification and isopropanol dehydration systems via incorporation of dividing-wall columns , 2014 .

[44]  Radu M. Ignat,et al.  Optimal design, dynamics and control of a reactive DWC for biodiesel production , 2013 .

[45]  Hao Yu,et al.  Design and Control of Dividing-Wall Column for the Synthesis of n-Propyl Propionate by Reactive Distillation , 2015 .

[46]  Eugeny Y. Kenig,et al.  Reactive Distillation in a Dividing Wall Column: Rate-Based Modeling and Simulation , 2007 .