Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 66: Issue 3
Thermal Effects Associated with the Incorporation of Transition Metal Catalysts Inside Alumino-silicate Supports
Author:
M. Riad Egyptian Petroleum Research Institute Egypt Egypt

Search for other papers by M. Riad in
Current site
Google Scholar
PubMed Close
Pages:
869–882
Online Publication Date:
26 Oct 2004
Publication Date:
01 Dec 2001
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1013112726838
Keywords:
alumino-silicate; catalysts; clay minerals; DSC; transition metals
Restricted access

Abstract  

Kaolinic and bentonitic-clays are selected to prepare transition metals, iron, cobalt and nickel catalysts. The metals are incorporated into two supports through new impregnation technique. The original clays and the prepared catalysts were subjected to different techniques. The crystallite size (X-ray diffraction analysis) increases from iron to cobalt then to nickel upon heating and the increase for bentonitic-catalysts is higher than that for kaolinic-ones. Infrared spectra show the appearance of bands signifying the presence of iron, cobalt and nickel bonded to OH group constituting the silica-silica tetrahedral sheets inside the clay structure. The enthalpy (ΔH) andentropy (ΔS) values (differential scanning calorimetric) are lower for bentonitic-catalysts than for kaolinic-catalysts. Thus, the incorporation of the metal hydroxide in the interlamella of the silicate-silicate bentonite clay structure facilitates the interaction between the unpaired electrons on the adjacent atoms and the support which enables the prepared catalysts to be more active for catalytic conversion.

  • Collapse
  • Expand
Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Jun 2024 2 0 0
Jul 2024 23 0 0
Aug 2024 17 0 0
Sep 2024 33 0 0
Oct 2024 79 0 0
Nov 2024 15 0 0
Dec 2024 1 0 0