2.50
Hdl Handle:
http://hdl.handle.net/2436/30478
Title:
Thermogravimetric Evidence of Nickel or Copper Isomorphously Substituted into a Zeolite.
Authors:
Round, Catherine I.; Williams, Craig D.; Latham, Kay; Duke, Catherine V. A.
Abstract:
The synthesis of pure silica ZSM-5 has been modified to produce highly crystalline material in the protonated form, necessary for catalytic activity, directly from a low water fluoride gel. Tetrahedrally co-ordinated divalent species of nickel and copper have been synthesised as salts of large organic cations and increasing mole fractions incorporated into the zeolite gels. The products have been analysed and characterised using simultaneous thermogravimetric and derivative thermogravimetric analysis (TG-DTG). The thermal decomposition under nitrogen of the metal associated cations, tetraethylammonium (TEA+), occluded within the zeolite channels is indicative and characteristic of the incorporation of heteroatoms into the zeolite framework. Anomalous losses in the systems can be explained by Jahn–Teller distortions. The mass losses increased with increased metal loading and were consistent with those reported in full water system, analysis also confirmed that the material was hydrophobic and thermally stable. Analysis by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR) and Atomic Absorption Spectroscopy (AAS) has confirmed the reliability of TG-DTG as a diagnostic tool. The maximum levels of substitution achieved were (mass%) Ni 3.93 and Cu 4.38.
Citation:
Journal of Thermal Analysis and Calorimetry, 63(2): 329-338
Publisher:
SpringerLink
Journal:
Journal of Thermal Analysis and Calorimetry
Issue Date:
2001
URI:
http://hdl.handle.net/2436/30478
DOI:
10.1023/A:1010133822423
Additional Links:
http://www.springerlink.com/content/q80lk687132nk781/; http://direct.bl.uk/bld/PlaceOrder.do?UIN=097565788&ETOC=RN&from=searchengine
Type:
Article
Language:
en
ISSN:
14182874; 15728943
Appears in Collections:
Plant and Environmental Research Group

Full metadata record

DC FieldValue Language
dc.contributor.authorRound, Catherine I.-
dc.contributor.authorWilliams, Craig D.-
dc.contributor.authorLatham, Kay-
dc.contributor.authorDuke, Catherine V. A.-
dc.date.accessioned2008-06-25T14:15:54Z-
dc.date.available2008-06-25T14:15:54Z-
dc.date.issued2001-
dc.identifier.citationJournal of Thermal Analysis and Calorimetry, 63(2): 329-338en
dc.identifier.issn14182874-
dc.identifier.issn15728943-
dc.identifier.doi10.1023/A:1010133822423-
dc.identifier.urihttp://hdl.handle.net/2436/30478-
dc.description.abstractThe synthesis of pure silica ZSM-5 has been modified to produce highly crystalline material in the protonated form, necessary for catalytic activity, directly from a low water fluoride gel. Tetrahedrally co-ordinated divalent species of nickel and copper have been synthesised as salts of large organic cations and increasing mole fractions incorporated into the zeolite gels. The products have been analysed and characterised using simultaneous thermogravimetric and derivative thermogravimetric analysis (TG-DTG). The thermal decomposition under nitrogen of the metal associated cations, tetraethylammonium (TEA+), occluded within the zeolite channels is indicative and characteristic of the incorporation of heteroatoms into the zeolite framework. Anomalous losses in the systems can be explained by Jahn–Teller distortions. The mass losses increased with increased metal loading and were consistent with those reported in full water system, analysis also confirmed that the material was hydrophobic and thermally stable. Analysis by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR) and Atomic Absorption Spectroscopy (AAS) has confirmed the reliability of TG-DTG as a diagnostic tool. The maximum levels of substitution achieved were (mass%) Ni 3.93 and Cu 4.38.en
dc.language.isoenen
dc.publisherSpringerLinken
dc.relation.urlhttp://www.springerlink.com/content/q80lk687132nk781/en
dc.relation.urlhttp://direct.bl.uk/bld/PlaceOrder.do?UIN=097565788&ETOC=RN&from=searchengineen
dc.subjectSpectroscopy, Fourier Transform Infrareden
dc.subjectX Ray Diffractionen
dc.subjectScanning Electron Microscopeen
dc.subjectMicroscopy, Electronen
dc.subjectSpectroscopy, Atomic Absorptionen
dc.subjectX Ray Fluorescenceen
dc.subjectGeochemistryen
dc.subjectZeolitesen
dc.subjectZSM-5en
dc.subjectNickelen
dc.subjectCopperen
dc.subjectThermogravimetric analysisen
dc.subjectIsomorphous substitutionen
dc.subjectGels, aqueous fluorideen
dc.subjectFluorideen
dc.titleThermogravimetric Evidence of Nickel or Copper Isomorphously Substituted into a Zeolite.en
dc.typeArticleen
dc.identifier.journalJournal of Thermal Analysis and Calorimetryen
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