Dissertation > Excellent graduate degree dissertation topics show

Deactivation Mechanism of Cation Resin Catalyst for Esterification of Acetic Acid and Isopropanol

Author: XiongZuo
Tutor: ZhuZhiHua；LiPing
School: East China University of Science and Technology
Course: Chemical processes
Keywords: Cation exchange resin isopropyl acetate kinetic reaction equation deactivation ferric ion adsorption
CLC: O643.3
Type: Master's thesis
Year: 2012
Downloads: 92
Quote: 0
Read: Download Dissertation

Abstract


The cation resin catalyst for isopropyl acetate synthesis can gradually lose its activity during the esterification of acetic acid with isopropanol. Aiming at disclosing the deactivation mechanism of cation resin catalyst, the structure and properties of the catalyst were analyzed and characterized carefully using ICP, EDS, EA and SEM techniques. By making comparison of the structure and properties between the fresh and deactivated catalysts, Fe3+ adsorption on the catalyst was assigned to be the main reason of catalyst deactivation.A minisize fixed-bed catalytic reaction apparatus was set up based on the features of the esterification. A kinetic reaction equation was derived from the experimental data of the reaction occurring in a temperature range of 60 to 90℃. It is shown that the reaction rate is one order to isopropanol and zero order to acetic acid, respectively.In the "acceleration deactivation" experiments, the deactivation process was tested after adding Fe3+(FeCl3, reaction solution as the solvent) to reaction solution deliberately at different temperatures (60～90℃) and different Fe3+ concentrations (0.25-0.75wt%). The results show that the adsorption of Fe3+ on the catalyst fits one-order model, and the deactivation of the catalyst occurs through homogeneous metal adsorption.In addition, the structure and properties of the fresh and deactivated catalysts from the "acceleration deactivation" experiments were characterized by SEM, XRF and XPS techniques, respectively. It was found that Fe3+ adsorption on the catalyst was assigned to be the main reason of catalyst deactivation. It caused the decrease of catalyst activity by replacing H+ of sulfo groups.

Related Dissertations

  1. The Research on Sulfate Leaching Properties of Cation-exchange Resin Used in Power Plants,TQ425.23
  2. Effect of IVM on rP2x4 Channel Deactivation,Q25
  3. Synthesis of 2-methyl-4-methoxylaniline by Pt/C Catalytic Hydrogenation,TQ246.31
  4. Preparationand Performance Evaluation of SnO2 Electrode with Long Service-life,X703.1
  5. Preparation and Recycling Nano-ZnO Composites,TQ426.81
  6. Effect of Support Calcination Temperature on Structure and Performance of Al2O3-Supported Nickel Phosphide Catalysts,O643.36
  7. Study of Continuous Dehydrogenation of Cyclohexane under Multi-phase Reaction Conditions,TQ203
  8. Preparation of Ultra-pure Tetrabutylammonium Hydroxide,TQ226
  9. Engine valve actuator cylinder deactivation technology,U464.334
  10. The Study on Ethane Oxychlorination Reaction Catalyst Properties and Deactivation,TQ222.423
  11. Preparation of L-Methionine by Hollow Fiber Enzymatic Membrane Reactor,TQ226.36
  12. Studies on Preparation, Characterization, Photocatalytic Evaluation and Deactivation Behavior of Sheet-like Nano Titania,O643.36
  13. Exogenous inorganic metal ions chloroperoxidase catalytic performance and structure-activity relationship studies,TQ032
  14. Adsorption of CO2 on Amine-modified SBA-16,X703
  15. The Biological and Electrophysiological Characteristics of the Selective Functional Inhibitory Müller Cell in Rats Model,R774.1
  16. Investingation of Ageing Strategies for NSR Materials under Lean-burn Condition,TQ426.6
  17. Study of the Heavy Metal Deactivation Technology during Pig Manure Compost Process,S141.4
  18. Deactivation in the Functional Brain Imaging Researches,R445.2
  19. The Study on the Hybrid Soft Sensor Modeling of Bisphenol A Production,TP29-A8
  20. Study on the Synthesis of Dimethyl Carbonate by Gas-phase Oxidative Carbonylation of Methanol on the Supported Solid Catalyst,O623.624
  21. Benzene/Propylene Alkylation on Modified β Zeolite,O643.3

CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic
© 2012 www.DissertationTopic.Net  Mobile