The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization
The structure, basicity and acidity properties of the alkali metals (Na, K and Cs) exchanged zeolite beta were investigated in this work. Infrared (IR) and X-ray diffraction (XRD) were used for structural characterizations, while Temperature programmed desorption of CO2 and NH3 were use for the dete...
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| Format: | Article |
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Indonesian Physical Society
2004
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| _version_ | 1796855140801576960 |
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| author | Wong, Kah Man Hadi, Nur Yacob, Abdul Rahim Ramli, Zainab |
| author_facet | Wong, Kah Man Hadi, Nur Yacob, Abdul Rahim Ramli, Zainab |
| author_sort | Wong, Kah Man |
| collection | ePrints |
| description | The structure, basicity and acidity properties of the alkali metals (Na, K and Cs) exchanged zeolite beta were investigated in this work. Infrared (IR) and X-ray diffraction (XRD) were used for structural characterizations, while Temperature programmed desorption of CO2 and NH3 were use for the determination of basicity and acidity, respectively. Results reveal that the framework structure of zeolite beta is retained after the exchange but with a successive decrease in the relative crystallinity after the modification. The acidity of zeolite beta has decreased significantly with the decrease in the crystallinity. However, the basicity after the exchange was not very significant in comparison to the acidity. The effect of the crystallinity and the type of alkali metal cations on basicity is also shown. |
| first_indexed | 2024-03-05T18:24:16Z |
| format | Article |
| id | utm.eprints-12797 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T18:24:16Z |
| publishDate | 2004 |
| publisher | Indonesian Physical Society |
| record_format | dspace |
| spelling | utm.eprints-127972017-02-08T01:07:48Z http://eprints.utm.my/12797/ The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization Wong, Kah Man Hadi, Nur Yacob, Abdul Rahim Ramli, Zainab QD Chemistry The structure, basicity and acidity properties of the alkali metals (Na, K and Cs) exchanged zeolite beta were investigated in this work. Infrared (IR) and X-ray diffraction (XRD) were used for structural characterizations, while Temperature programmed desorption of CO2 and NH3 were use for the determination of basicity and acidity, respectively. Results reveal that the framework structure of zeolite beta is retained after the exchange but with a successive decrease in the relative crystallinity after the modification. The acidity of zeolite beta has decreased significantly with the decrease in the crystallinity. However, the basicity after the exchange was not very significant in comparison to the acidity. The effect of the crystallinity and the type of alkali metal cations on basicity is also shown. Indonesian Physical Society 2004 Article PeerReviewed Wong, Kah Man and Hadi, Nur and Yacob, Abdul Rahim and Ramli, Zainab (2004) The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization. Physics Journal of the Indonesian Physical Society, A7 (0211). ISSN 14108860 http://www.jurnal.lipi.go.id/publikasi.cgi?tampilpublikasi2&1074191983&Inggris&vol=A7&0401282990 |
| spellingShingle | QD Chemistry Wong, Kah Man Hadi, Nur Yacob, Abdul Rahim Ramli, Zainab The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization |
| title | The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization |
| title_full | The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization |
| title_fullStr | The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization |
| title_full_unstemmed | The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization |
| title_short | The basicity and acidity of beta zeolites after ion-exchange with alkali metal cations: a physicochemical characterization |
| title_sort | basicity and acidity of beta zeolites after ion exchange with alkali metal cations a physicochemical characterization |
| topic | QD Chemistry |
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