Dissertation > Excellent graduate degree dissertation topics show

Application Research of Catalytic Distillation Technology in the Alcohol Dehydration Reactions

Author: ZouZhiWu
Tutor: LeiZhiGang
School: Beijing University of Chemical Technology
Course: Chemical Engineering and Technology
Keywords: catalytic distillation alcohol dehydration reactions intrinsickinetics dimethyl ether isobutylene process simulation
CLC: TQ202
Type: Master's thesis
Year: 2012
Downloads: 179
Quote: 1
Read: Download Dissertation

Abstract


Catalytic distillation is an important chemical engineering processintegration technology combining catalytic reaction and distillation separationprocesses. It has been receiving a growing attention and has also been wildlyused in industrial production for offering a great number of advantages such ashigh selectivity, high conversion, low energy consumption, low investment,etc. In this thesis, the application of catalytic distillation technology in thealcohol dehydration reactions taking the methanol dehydration betweenmolecules to dimethyl ether and tert-butanol intramolecular dehydration toisobutylene for example was researched.Firstly, the intrinsic kinetics of methanol dehydration to dimethyl etherover an ion exchange resin catalyst was determined in a fixed-bed reactor. Theintrinsic kinetic model was established on the basis of Eley-Rideal mechanism,in which the parameters were estimated by fitting the experimental data, andthe activation energy Eaof68.7kJ·mol-1and the pre-exponential factor k0of120.7m3·kgcat-1·s-1were obtained. Then the kinetic model was tested and thetest results show that the kinetic model established not only agrees with the experimental results well but also is highly reliable, which indicates that thekinetic model can be adopted in the further study.Secondly, a new process consisting of the combination of a fixed-bedreactor and a catalytic distillaiton column for the synthesis of dimethyl etherfrom the dehydration of methanol was proposed. On the basis of the intrinsickinetic equaiton of methanol dehydration obtained above, the equilibriumstage model was adopted to simulate the new process on the Aspen Plussimulation platform and the comparison among the new process, traditionalprocess as well as the process consisting of a single catalytic distillaitoncolumn was also made. It was found that the technology combining afixed-bed reactor and a catalytic distillaiton column is more promising withrespect to the heat duty needed per unit mass of product than other twoprocesses.Finally, a new process for the separation of high-purity isobutylene fromraffinate C4was proposed. The equilibrium stage model was adopted tosimulate the part of tert-butanol dehydration to isobutylene using a singlecatalytic distillation column of the process on the Aspen Plus simulationplatform, into which the intrinsic kinetics of tert-butanol dehydrationdetermined in the reference was input. And the comparison among the processproposed, the process consisting of the combination of a fixed-bed reactor anda catalytic distillaiton column and traditional process was made. It was foundpromising with respect to the equipment investment as well as the heat duty needed per unit mass of product when using a single catalytic distillationcolumn.

Related Dissertations

  1. Density Functional Theory Study of Dimethyl Ether Adsorption on the Low-Index Pt Surface,O485
  2. Separation of Fatty Acid Methyl Ester Mixture,TQ028.3
  3. Preparation and Characterization of Silica-, Alumina-Based Catalysts for Methanol Dehydration,TQ426
  4. Study on Optimization and Energy Saving for the Heat Exchanger Network of 10Mt/a Oil Refinery,TE683
  5. Simulation of Aromatics Extraction and Distillation Process,TQ241
  6. Studies on Two-stage Coal Gasification Technology with Calcium Salt,TQ546
  7. Kinetic Research on Synthesis Tert-Butyl Acetate with Acetic Acid and Isobutylene,TQ225.24
  8. Simulation and Emulation of Methanol Distillation Process in Large-scale Coal Chemical Industry,TQ223.121
  9. Optimization of Ethanol-ether Biofuels Mixtures Separation Process,TQ517
  10. Simulation and Optimization Control of the Acetic Acid Azeotropic Distillation Process,TQ028.31
  11. Simulation and Analysis of Reactive Distillation Using gPROMS Platform,TQ028.31
  12. The Optimization of Acrylic Acid Distillation System,TQ225.131
  13. Study on Process Technology for Production of High Reactivity Polyisobutene,TQ325.15
  14. The Simulation and Optimization of Solvent Recovery System for Ketone-Benzene Dewaxing Device,TE624.53
  15. Study on Synthesis of Tert-butyl Acetate by Direct Esterification with Acetic Acid and Isobutene,TQ225.241
  16. Research on Customization of PLM System Oriented to Power Boiler Industry,TM621.2
  17. Study on Amorphous Copper-Based Catalysts for Direct Synthesis of Dimethyl Ether by Hydrogenation of Carbon Dioxide,TQ223.24
  18. Studies on Catalysts for Hydrogen Production from Low Temperature Steam Reforming of Dimethyl Ether,TQ426.94
  19. Numerical Simulation of LTL Natural Gas Liquefaction Process and Its Heat Exchanger,TE646
  20. The Construction Mechanics Study of the Long-Span Steel Truss Roof Above the Stage in a Zone of Phoenix Valley,TU391
  21. Modeling of the Fischer-Tropsch Synthesis in Slurry Bubble Column Reactor,TQ529.2

CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > General issues > Chemical Process
© 2012 www.DissertationTopic.Net  Mobile