Thermally Induced Phase Transformation of Mn ‒ LTA and Mn ‒FAU Zeolite to Anorthite Phases

Authors

  • Ana Radosavljević-Mihajlović Institute for technology of nuclear and other mineral raw materials
  • Vojislav Mitić Institute of Technical Sciences of the Serbian Academy of Science and Arts; University of Electronic Nis
  • Aleksandra Šaponjić Department of physical chemistry, VINCA Institute of Nuclear Science-National Institute of the Republic of Serbia, University of Belgrade
  • Vladan Kasić Institute for technology of nuclear and other mineral raw materials

Abstract

Data on thermally induced transformations of Mn exchanged zeolites LTA and FAU topology are presented in this paper. Thermally induced phase transformation of Mn-exchange zeolites are followed in the range from 700 to 1300 oC. Both frameworks collapse into amorphous intermediate products after heating between 600 and 650 oC. Prolonged heating of the intermediate product above 1100 °C results directly in formation of a disorder Mn-anorthiteLTA and Mn-anorthiteFAU. The parameter of unit cell of Mn-anorthiteLTA and Mn-anorthiteFAU, in temperature range between 700 and 1300 oC, was observed in space group C-1. The phase conversions in the temperature range investigated were followed by thermal, X-ray powder diffraction and FT-IR analyses.

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Published

2021-08-31

Issue

Vol. 53 No. 3 (2021)

Section

Articles