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Thermogravimetric Evidence of Cobalt or Manganese Isomorphously Substituted into a Zeolite

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Abstract

Pure silica zeolite ZSM-5 has been synthesised in a slightly acidic aqueous fluoride medium which produces the protonated form of the zeolite ZSM-5 [1]. Tetrahalometallate [2] species of cobalt and manganese have been synthesised and increasing mole fractions incorporated into the zeolite synthesis gel. The products have been analysed and characterised using simultaneous thermogravimetric-derivative thermogravimetric analysis (TG-DTG). The thermal decomposition, under nitrogen of the associated tetraethylammonium (TEA+) and tetrapropylammonium (TPA+) cations occluded within the zeolite channels is indicative and characteristic of the incorporation of the heteroatoms into the zeolitic framework. Analysis by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence (XRF), and Fourier transform infrared spectroscopy (FTIR) has confirmed the reliability of thermogravimetric (TG) and derived thermogravimetric analysis (DTG) as a diagnostic tool.

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Authors and Affiliations

  1. University of Wolverhampton, School of Applied Sciences, Wulfruna Street, Wolverhampton, WV1 1SB, United Kingdom

    C. I. Round, C. D. Williams & C. V. A. Duke

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  1. C. I. Round
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  2. C. D. Williams
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  3. C. V. A. Duke
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Round, C.I., Williams, C.D. & Duke, C.V.A. Thermogravimetric Evidence of Cobalt or Manganese Isomorphously Substituted into a Zeolite. Journal of Thermal Analysis and Calorimetry 54, 901–911 (1998). https://doi.org/10.1023/A:1010116625710

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  • DOI: https://doi.org/10.1023/A:1010116625710

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