Effect of γ-irradiation on the crystallinity and catalytic activity of NdX and NdY zeolites

M. Selim; A. Kira; S. Ali; S. Abdel-Hamid

doi:10.1007/bf02165278

Jump to Content

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 164: Issue 4

Effect of γ-irradiation on the crystallinity and catalytic activity of NdX and NdY zeolites

Authors:

M. Selim

M. Selim National Research Center Dokki Cairo Egypt

Search for other papers by M. Selim in
Current site
Google Scholar
PubMed

A. Kira

A. Kira Egyptian Petroleum Research Institute Nasr City, Cairo Egypt

Search for other papers by A. Kira in
Current site
Google Scholar
PubMed

S. Ali

S. Ali Ain Shams University Faculty of Girls Cairo Egypt

Search for other papers by S. Ali in
Current site
Google Scholar
PubMed

, and

S. Abdel-Hamid

S. Abdel-Hamid Egyptian Petroleum Research Institute Nasr City, Cairo Egypt

Search for other papers by S. Abdel-Hamid in
Current site
Google Scholar
PubMed

View More View Less

Pages:: 229–240

Online Publication Date:: 27 Sep 2005

Publication Date:: 17 Mar 1992

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02165278

Restricted access

Abstract

Different Nd-zeolites were prepared from the original NaX and NaY zeolites by ion exchange. The hydrated and thermally activated (at 550 °C) samples obtained were irradiated with -rays of 1.5 and 10.0 Mrad. The unirradiated and irradiated samples were characterized mainly by X-ray diffraction and tested for catalytic activity in cumene cracking. The X-ray diffraction patterns indicated a slight decrease of crystallinity after irradiation. However, the irradiated samples exhibited higher catalytic activities than unirradiated ones. -Irradiated hydrated zeolites were found to possess comparable activities, whereas the irradiated dehydrated samples were more active. Higher irradiation doses resulted in more active dehydrated zeolites than those irradiated with a lower dose. The observed higher activity was attributed to the formation of tricoordinate aluminium atoms in the zeolite structure, leading to increase of the number of acidic sites and consequently to a catalytic activity.

Save
Cite
Email this content

Share Link

Copy this link, or click below to email it to a friend
Email this content
or copy the link directly:

https://akjournals.com/abstract/journals/10967/164/4/article-p229.xml
The link was not copied. Your current browser may not support copying via this button.

Link copied successfully

Collapse
Expand

Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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 Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
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	0236-5731 (Print)
ISSN	1588-2780 (Online)