A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents

A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents

The deactivation of USY zeolites with different rare earth contents due to the coke formed from n-heptane at 450oC was studied. The results show that the presence of rare earth elements decreases the cracking and coking activities, increasing catalytic stability. However, reaction selectivity was not significantly influenced. The greater the rare earth content, the lower the coking rates and the coke contents. The TPO/DSC profiles suggested that the catalytic effect of the rare earth elements promoted coke oxidation.

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Main Authors: Henriques,C.A., Santos,J.O.J., Polato,C.M.S., Valle,M.L. Murta, Aguiar,E.F.S., Monteiro,J.L.F.
Format: Digital revista
Language:English
Published: Brazilian Society of Chemical Engineering 1998
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66321998000200003
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spelling oai:scielo:S0104-663219980002000031998-10-09A study on the Deactivation of Usy Zeolites with Different Rare Earth ContentsHenriques,C.A.Santos,J.O.J.Polato,C.M.S.Valle,M.L. MurtaAguiar,E.F.S.Monteiro,J.L.F. Coke deactivation REY zeolites The deactivation of USY zeolites with different rare earth contents due to the coke formed from n-heptane at 450oC was studied. The results show that the presence of rare earth elements decreases the cracking and coking activities, increasing catalytic stability. However, reaction selectivity was not significantly influenced. The greater the rare earth content, the lower the coking rates and the coke contents. The TPO/DSC profiles suggested that the catalytic effect of the rare earth elements promoted coke oxidation.info:eu-repo/semantics/openAccessBrazilian Society of Chemical EngineeringBrazilian Journal of Chemical Engineering v.15 n.2 19981998-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66321998000200003en10.1590/S0104-66321998000200003
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country Brasil
countrycode BR
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databasecode rev-scielo-br
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region America del Sur
libraryname SciELO
language English
format Digital
author Henriques,C.A.
Santos,J.O.J.
Polato,C.M.S.
Valle,M.L. Murta
Aguiar,E.F.S.
Monteiro,J.L.F.
spellingShingle Henriques,C.A.
Santos,J.O.J.
Polato,C.M.S.
Valle,M.L. Murta
Aguiar,E.F.S.
Monteiro,J.L.F.
A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents
author_facet Henriques,C.A.
Santos,J.O.J.
Polato,C.M.S.
Valle,M.L. Murta
Aguiar,E.F.S.
Monteiro,J.L.F.
author_sort Henriques,C.A.
title A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents
title_short A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents
title_full A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents
title_fullStr A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents
title_full_unstemmed A study on the Deactivation of Usy Zeolites with Different Rare Earth Contents
title_sort study on the deactivation of usy zeolites with different rare earth contents
description The deactivation of USY zeolites with different rare earth contents due to the coke formed from n-heptane at 450oC was studied. The results show that the presence of rare earth elements decreases the cracking and coking activities, increasing catalytic stability. However, reaction selectivity was not significantly influenced. The greater the rare earth content, the lower the coking rates and the coke contents. The TPO/DSC profiles suggested that the catalytic effect of the rare earth elements promoted coke oxidation.
publisher Brazilian Society of Chemical Engineering
publishDate 1998
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66321998000200003
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