ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
Four samples of Ba-exchanged zeolite A, bearing 0.27, 0.43, 0.58 and 0.74 meq/g Na residualamounts, were thermally treated in the temperature range 200-1500 °C for times up to 28 hours.The same samples were pressed at 30 and 60 MPa to manufacture cylindrical pellets, which werethermally treated at 1300 °C for 5 hours. Thermally treated materials were characterized by roomtemperature XRD. The sequence of thermal transformations that Ba-exchanged zeolite A undergoes(zeolite ® amorphous phase ® hexacelsian ® monoclinic celsian) and the strong mineralizingaction developed by Na are confirmed. Pressing the Ba-exchanged zeolite A powder-like samples toobtain cylindrical pellets is found to expedite the sluggish final phase transition hexacelsian ®monoclinic celsian. The optimum residual Na content of Ba-exchanged zeolite A to be transformedinto monoclinic celsian is assessed to range between 0.27 and 0.43 meq/g
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.963.pdf
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