Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 84: Issue 2
Effect of cerium, holmium and samarium ions on the thermal and structural properties of the HZSM-12 zeolite
Authors:
Anne Garrido Pedrosa Federal University of Rio Grande do Norte Department of Chemistry Natal Brazil 59078-970 CP1662 Natal Brazil 59078-970 CP1662

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M. Souza Federal University of Sergipe Department of Chemical Engineering São Cristovão Brazil 49100-000 São Cristovão Brazil 49100-000

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A. Silva UNIFACS Laboratory of Catalysis and Environmental Salvador Brazil 40220-141 Salvador Brazil 40220-141

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Dulce Melo Federal University of Rio Grande do Norte Department of Chemistry Natal Brazil 59078-970 CP1662 Natal Brazil 59078-970 CP1662

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A. Araujo Federal University of Rio Grande do Norte Department of Chemistry Natal Brazil 59078-970 CP1662 Natal Brazil 59078-970 CP1662

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Pages:
503–509
Online Publication Date:
13 Dec 2005
Publication Date:
01 May 2006
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-6911-5
Keywords:
acid properties; DSC; DTA; HZSM-12 zeolite; rare earth; TG
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Abstract  

The study of the incorporation of rare earth elements as additives in Y zeolites is a very interesting field of research, mainly by its potential application as additives in catalytic cracking process. In this work was studied the thermal and structural properties of cerium, holmium and samarium supported on HZSM-12 zeolite. The obtained materials were characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR), nitrogen adsorption, thermogravimetry (TG/DTG), differential scanning calorimetry (DSC) and differential thermal analysis (DTA). TG/DSC/DTA analyses showed that the dehydration temperatures of RE/HZSM-12 zeolites (RE=Ce, Ho, Sm) increase in relation to pure HZSM-12. The acid properties were investigated by pyridine thermo desorption via TG. The results showed two events of mass loss attributed to elimination of pyridine adsorbed on the weak+medium acid sites and on the strong acid sites.

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

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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)

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