Dissertation > Excellent graduate degree dissertation topics show

Studies on γ-Al2O3 Supported Palladium Catalysts for Hydrogenation of C9 Petroleum Resin

Author: LuJia
Tutor: MaLei；LiXiaoNian
School: Zhejiang University of Technology
Course: Industrial Catalysis
Keywords: C9 petroleum resin catalytic hydrogenation γ-Al2O3 Pd modified
CLC: TE624.9
Type: Master's thesis
Year: 2011
Downloads: 79
Quote: 0
Read: Download Dissertation

Abstract


More and more attentions on the hydrogenation of C9 petroleum resin have been attracted in recent years. At present the research of petroleum resin hydrogenation is mainly focused on the hydrogenation of C5 petroleum resin. The hydrogenation technology of petroleum resin in abroad has been used in industry, however, the studies on petroleum resin hydrogenation is still in stage of laboratory domestically. Therefore, it is urgent to develop catalytic hydrogenation technology of C9 petroleum resin. In this study, three types of commercialγ-Al2O3 were used as support of Pd catalysts. And the effects of structural properties ofγ-Al2O3, surface acid properties and active metal components of Pd/γ-Al2O3 catalysts on the catalytic activity and stability for the C9 petroleum resin hydrogenation were investigated, and theγ-Al2O3 supports and supported Pd catalysts were characterized in detail by N2 adsorption, CO chemisorption, XRD (X-ray diffraction), SEM (Scanning Electron Microscope), TEM (transmission electron microscopy), NH3-TPD (temperature-programmed desorption) techniques. The experimental results indicated that pore size of supported hydrogenation catalysts is of an significant influence on the catalytic hydrogenation of C9 petroleum resin. And the adequate macro-pores of catalyst is favorable to increase the catalytic activity and stability in catalytic hydrogenation of macromolecule. The pores ofγ-Al2O3 (W251) are majorly distributed in the range of macroprous size, which is favor to palladium precursor easily accessed to macroprous interior, it consequently promoted Pd dispersion and formed "egg white" catalysts.Furthermore, the deactivation of Pd/γ-Al2O3 catalysts in hydrogenation of C9 petroleum resin could be attributed to the carbon deposition and sulfur poisoning. Mg-modifiedγ-Al2O3 support has stable magnesia alumina spinel (MgAl2O4 structure at matricesγ-Al2O3 surface layer, it is demonstrated that the existence of MgAl2O4 spinel can decrease total amount of both strong acid sites and weak acid sites remarkably. It is extraordinary avail for preventing catalyst carbon deposit. At the sane time, PdPt bi-component catalyst also enhanced the resistance to sulfur poisoning.

Related Dissertations

  1. Study on Preparation of Composite Cross-linked Modified Modified Potato Starch,TS236.9
  2. Coupled Dynamics of Excitable Systems Base on Morris-Lecar Model,Q42
  3. Multi-walled Carbon Nanotubes Au _AT_ of Pt, Au _AT_ of Pd core-shell structure of the catalyst preparation and electrochemical properties of,O643.36
  4. Under microaerobic conditions closed calcium carbide furnace exhaust COS gas adsorption purification,X781
  5. Study on Using Sepiolite As Supported Catalysts in Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol,O643.32
  6. Preparation of Epichlorohydrin from Crude Glycerol of Biodiesel By-product,TQ223.26
  7. Synthesis and Application of A Novel Series of Cation Hydrophobically Modified Polyacrylamide,TQ323.6
  8. Study on the Synthesis and Adsorption Behaviour of Chitosan Derivative,TS254.9
  9. Modification and Application of the Waste Fluorgypsum and the Treating of High Concentrations Fluoride Wastewater,X703
  10. Adsorption Effects of Phosphate and Chromium from Aqueous Solution by Adsorption Using LDH and Mg/Fe/Al Modified Montmorillonites,X703
  11. Study on Detection of Transgenic Ingredients in Genetically Modified Cottonseed Meal and Its Degradation during Feed Processing,S816
  12. Integrable Discretizations to a Class of Soliton Equations,O175.2
  13. Studies on Construction of Specific Gland Expressional Vector of HLF and Modified Fibroblast Cell Line,Q78
  14. The Study of Anode Catalyst Pd/C for Direct Formic Acid Fuel Cell,O643.36
  15. Pd-based cathode catalysts of direct methanol fuel cell,O643.36
  16. An Analysis on Consumers’ Cognition and Attitudes of Genetically Modified Edible Oil,F426.82
  17. Soil Erosion Simulation in Hilly Area of South China,S157
  18. Effects of Modified Ultrafiltration on Aquaporin 1 in Cardiopulmonary Bypass,R654.2
  19. Mouse anti-human PD-L1 functionality Xing monoclonal antibody developed by and its biological characteristics of research,R392
  20. Mouse anti-human PD-L2 monoclonal antibody and the human soluble PD-L2ELISA kit for,R392
  21. Expression and Clinic Significance of PD-1/PD-L1 Costimulatory Molecules in Peripheral Blood of Rheumatoid Arthritis,R593.22

CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Catalyst
© 2012 www.DissertationTopic.Net  Mobile