Repozytorium Uniwersytetu Jagiellońskiego

Influence of the calcination treatment on the catalytic properties of hierarchical ZSM-5

Pokaż opis pozycji

dc.contributor.author

Serrano, David P.

pl
dc.contributor.author

Garcia, Rafael A.

pl
dc.contributor.author

Linares, Maria

pl
dc.contributor.author

Gil, Barbara [SAP11016267]

pl
dc.date.accessioned

2015-02-24T15:12:06Z

dc.date.available

2015-02-24T15:12:06Z

dc.date.issued

2012

pl
dc.identifier.issn

0920-5861

pl
dc.identifier.uri

http://ruj.uj.edu.pl/xmlui/handle/item/3302

dc.language

eng

pl
dc.title

Influence of the calcination treatment on the catalytic properties of hierarchical ZSM-5

pl
dc.type

JournalArticle

pl
dc.description.physical

91-101

pl
dc.abstract.en

The effect of the calcination conditions on the properties and catalytic performance of hierarchical ZSM-5 zeolite has been investigated using different reactions as catalytic tests: acylation of aromatic substrates and rearrangement of linear and cyclic epoxides. The hierarchical h-ZSM-5 material was prepared by crystallization of silanized protozeolitic units. The removal of the organics present in the as-synthesized ZSM-5 samples has been carried out using two different calcination procedures: (i) directly under air atmosphere; (ii) following a two-step (nitrogen-air) treatment. Clear differences are noticed related to the textural properties of the ZSM-5 samples, since the h-ZSM- 5 presents higher BET and external surface area than standard ZSM-5 zeolite. Whereas the calcination method does not affect the properties of the reference ZSM-5 sample, noticeable changes were observed over the hierarchical zeolite. The concentration of Brønsted acid sites decreases by half for one-step air calcination, but only a quarter when using a two-step nitrogen/air calcination, showing that the aluminium present in hierarchical ZSM-5 is very sensitive to the calcination conditions as it may undergo framework extraction and dehydroxylation phenomena. For all the studied reactions, the hierarchical sample, calcined by a two-step treatment, presents higher activity than when using direct air calcination

pl
dc.subject.en

hierarchical ZSM-5 zeolite

pl
dc.subject.en

Friedel–Crafts acylation

pl
dc.subject.en

calcination procedure

pl
dc.subject.en

epoxide rearrangement

pl
dc.description.volume

179

pl
dc.description.number

1

pl
dc.identifier.doi

10.1016/j.cattod.2011.06.029

pl
dc.identifier.eissn

1873-4308

pl
dc.title.journal

Catalysis Today

pl
dc.title.volume

The 4th Czech-Italian-Spanish (CIS-4) workshop on Molecular Sieves and Catalysis

pl
dc.language.container

eng

pl
dc.affiliation

Wydział Chemii : Zakład Chemii Nieorganicznej

pl
dc.subtype

Article

pl
.pointsMNiSW

[2012 A]: 40



Pliki tej pozycji

Plik Rozmiar Format Przeglądanie

Nie ma plików powiązanych z tą pozycją.

Pozycja umieszczona jest w następujących kolekcjach

Pokaż opis pozycji

Szukaj w RUJ


Szukanie zaawansowane

Statystyki