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Influence of the final “ageing” temperature on the regeneration behaviour and location of the coke obtained in the HZSM-5 and USY zeolites during the LDPE cracking

Paper ID Volume ID Publish Year Pages File Format Full-Text
43186 45958 2008 6 PDF Available
Title
Influence of the final “ageing” temperature on the regeneration behaviour and location of the coke obtained in the HZSM-5 and USY zeolites during the LDPE cracking
Abstract

In this work, the influence of the “ageing” temperature on the location and regeneration behaviour of the coke obtained in the cracking of LDPE in the presence of HZSM-5 and USY zeolites is studied. The coke content in the zeolites is influenced by the thermal treatment, and for both zeolites studied, the higher the final cracking temperature the lower the coke content. The nitrogen adsorption isotherms have shown the different deactivation mechanisms, related to the possible different locations of the coke on each zeolite and the influence of the final cracking temperature on these parameters. The regeneration study of the coked zeolites has shown that the coke combustion process strongly depends on the insoluble content of the coke (i.e., of the presence of bulky polyaromatic compounds) and of the zeolite framework.

Graphical abstractThe work shows the influence of the final “ageing” temperature on the nitrogen adsorption isotherms which shows the possible deactivation mechanisms and the location of the coke on each zeolite. The regeneration study of the coked zeolites has shown that the coke combustion process strongly depends on the insoluble content of the coke and of the zeolite framework. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
LDPE; deactivation; HZSM-5; USY
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Influence of the final “ageing” temperature on the regeneration behaviour and location of the coke obtained in the HZSM-5 and USY zeolites during the LDPE cracking
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 334, Issues 1–2, 1 January 2008, Pages 20–25
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us