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Izvorni znanstveni članak
https://doi.org/10.5562/cca2055
Zeolite A Synthesis under Dynamic Conditions, after Hydrogel Ageing
Ana Palčić
orcid.org/0000-0002-1092-4739
; Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
Lavoslav Sekovanić
; Geotechnical Faculty, University of Zagreb, Hallerova aleja 7, 42 000 Varaždin, Croatia
Boris Subotić
; Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
Josip Bronić
orcid.org/0000-0001-5846-0235
; Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| Puni tekst: engleski, pdf (4 MB) | str. 297-301 | citiraj | |
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APA 6th Edition Palčić, A., Sekovanić, L., Subotić, B. i Bronić, J. (2012). Zeolite A Synthesis under Dynamic Conditions, after Hydrogel Ageing. Croatica Chemica Acta, 85 (3), 297-301. https://doi.org/10.5562/cca2055 MLA 8th Edition Palčić, Ana, et al. "Zeolite A Synthesis under Dynamic Conditions, after Hydrogel Ageing." Croatica Chemica Acta, vol. 85, br. 3, 2012, str. 297-301. https://doi.org/10.5562/cca2055. Citirano 18.11.2019. Chicago 17th Edition Palčić, Ana, Lavoslav Sekovanić, Boris Subotić i Josip Bronić. "Zeolite A Synthesis under Dynamic Conditions, after Hydrogel Ageing." Croatica Chemica Acta 85, br. 3 (2012): 297-301. https://doi.org/10.5562/cca2055 Harvard Palčić, A., et al. (2012). 'Zeolite A Synthesis under Dynamic Conditions, after Hydrogel Ageing', Croatica Chemica Acta, 85(3), str. 297-301. https://doi.org/10.5562/cca2055 Vancouver Palčić A, Sekovanić L, Subotić B, Bronić J. Zeolite A Synthesis under Dynamic Conditions, after Hydrogel Ageing. Croatica Chemica Acta [Internet]. 2012 [pristupljeno 18.11.2019.];85(3):297-301. https://doi.org/10.5562/cca2055 IEEE A. Palčić, L. Sekovanić, B. Subotić i J. Bronić, "Zeolite A Synthesis under Dynamic Conditions, after Hydrogel Ageing", Croatica Chemica Acta, vol.85, br. 3, str. 297-301, 2012. [Online]. https://doi.org/10.5562/cca2055 |
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Sažetak
Zeolites are crystalline, microporous, alumo-silicate materials (around 400 types) which are used in many applications. Each field of usage (catalysis, ion exchange, sorption, molecular sieving, etc.) has demands regarding crystals’ structural and particulate properties. Detailed understanding of the mechanisms of crystals’ formation and growth enables the control of these properties. Hydrogels of the starting composition 3.2 Na2O × 2 SiO2 × 1.05 Al2O3 × 250 H2O were heated in stainless steel reactor at 80 °C under dynamic conditions, after ageing for tA = 0–209 h at 25 °C. Solid phase samples were characterized using microscopy (OM, SEM), PXRD and laser light scattering (LLS). Specific number of zeolite A crystals was calculated from particle size distributions. It was shown that the some particulate properties: specific number of crystals and crystal size distribution, are changing towards higher number of crystals and wider size distribution while the morphology of the crystals remains the same. Also, the crystal growth rate is higher in the systems which are treated under dynamic conditions. Obtained results were compared with data of systems crystallized under static conditions and commented on the grounds of the autocatalytic nucleation theory. (doi: 10.5562/cca2055)
Ključne riječi
zeolite A; autocatalytic nucleation; crystal size distribution; hydrogel ageing
Hrčak ID: 92098
URI
https://hrcak.srce.hr/92098
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