Browse DORAS
Browse Theses
Search
Latest Additions
Creative Commons License
Except where otherwise noted, content on this site is licensed for use under a:

The preparation and investigation of supported hydrocarbon oxidation catalysts

Dreelan, Michael Joseph (1989) The preparation and investigation of supported hydrocarbon oxidation catalysts. Master of Science thesis, Dublin City University.

Full text available as:

[img]PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1825Kb

Abstract

Alumina has been extensively used as a catalyst support material. It exists in several different phases namely y, r], 8,0 and a. Phase transformations (eg y -» 8 0 —> a) can occur at well defined temperatures. If transformations occur during catalyst use, then the activity of the catalyst can be reduced significantly. In this project, the effect of addition of metals to ti-A120 3 was investigated in an effort to stablise the high surface area phase at high temperatures. The following ions were added at 1 and 3wt% loadings’ Ba2+, Ca2+, Ce3+, Cs+, La3+ and Zr4*. In this investigation the order of the T|-A120 3 stablisation at 1270K was found to be as follows: La3+ > Ce3+ = Cs+ > Zr4* « Ba2+ - Ca2+ Chemisorption measurements on Pt/n-Al20 3 catalysts, showed that the maximum dispersion of platinum (Pt) was obtained at a 3wt% loading. Catalyst samples containing this loading of Pt on tj-A120 3 were then prepared with the incorporation of either of the ions, La3+, Ce3+, Cs+ and Sn4+ The method of preparation of these samples was vaned by using either co-impregriation or step impregnation and the activity of the resulting catalysts was tested using the reaciton, iso - C4 H10 + 0 2 ------> PRODUCTS the most active catalyst sample was found to be lwt%Cs, 3wt%Pt/n-Al20 3, having a catalytic activity of up to 10 times greater than a 3wt% Pt/n-Al20 3.

Item Type:Thesis (Master of Science)
Date of Award:1989
Refereed:No
Supervisor(s):Finlayson, Odilla
Uncontrolled Keywords:Catalysts; Alumina; Catalyst support materials
Subjects:Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 License. View License
ID Code:18547
Deposited On:24 Jul 2013 14:27 by Celine Campbell. Last Modified 24 Jul 2013 14:27

Download statistics

Archive Staff Only: edit this record