Abstract
A statistical technique for optimizing zeolite Na-A synthesis as a function of percent yield was investigated. A two-step hydrothermal treatment method assisted by microwave heating was applied on the extracted ion solution for zeolites synthesis. The optimization sequence included the application of an experimental design and the results obtained were fitted to a second order model. The resultant predicted data were used in creation of an optimal set of conditions. Box–Behnken design of response surface methodology of three factors with three levels was applied. The three factors which have been adopted were NaOH concentration (2, 4 and 6 M), microwave power level (10, 55 and 100 % of 800 W) and time of exposure to the irradiation (1, 3.5 and 6 min). With the application of the above experimental design three solid products, Na-A zeolite, sodalite octahydrate and gibbsite were formed. The three products were characterized by their X-ray diffraction images. It was found that the percent yield of Na-A zeolite would be optimized when the extracted Si ion concentration in the response optimizer was higher than 2,000 ppm and the base used in the extraction not more than 4 M. The optimum conditions to maximize the percent yield of zeolite Na-A were 3.8 M of NaOH, 2.5 min of time and 48.2 % W of microwave power level.
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Shafiq N., Nuruddin M.F., Kamaruddin I.: Comparison of engineering and durability properties of fly ash blended cement concrete made in UK and Malaysia. Adv. Appl. Ceramics 106, 314–318 (2007)
Yaping Y. et al.: Synthesis of pure zeolites from supersaturated silicon and aluminum alkali extracts from fused coal fly ash. Fuel 87, 1880–1886 (2008)
Shigemoto N., Hayashi H., Miyaura K.: Selective formation of Na-X zeolite from coal fly ash by fusion with sodium hydroxide prior to hydrothermal reaction. J. Mater. Sci. 28, 4781–4786 (1993)
Woolard CD., Petrus K., Horst M.: van der The use of a modified fly ash as an adsorbent for lead. Water SA 26, 531–536 (2000)
Hollman GG., Steenbruggen G., Janssen-Jurkovicova M.: A two-step process for the synthesis of zeolites from CFA. Fuel 78, 1225–1230 (1999)
Querol X. et al.: Synthesis of Na-zeolites from fly ash. Fuel 76, 793–799 (1997)
Steenbruggen G., Hollman GG.: Synthesis of zeolites from fly ash and the properties of the zeolite products. J. Geochem. Explor. 62, 305–309 (1998)
Murayama N., Yamamoto H., Shibita J.: Mechanism of zeolite synthesis from coal fly ash by alkali hydrothermal reaction. Int. J. Min. Process. 64, 1–17 (2002)
Shih W-H., Chang H-L.: Conversion of fly ash into zeolites for ion-exchange applications. Mater. Lett. 28, 263–268 (1996)
Tanaka H., SakaiY. , Hino R.: Formation of Na-A and -X zeolites from waste solutions in conversion to zeolites. Mater. Res. Bull. 37, 1873–1884 (2002)
Querol X. et al.: Synthesis of zeolites from fly ash in a pilot plant scale: examples of potential environmental applications. Fuel 80, 857–865 (2001)
Ferreira-Dias S. et al.: Contribution of response surface design to the development of glycerolysis systems catalyzed by commercial immobilized lipases. J. Mol. Catal. B Enzym 11, 699–711 (2001)
Øye G., Sjöblom J., Stöcker M.: A multivariate analysis of the synthesis conditions of mesoporous materials. Micropor. Mesopor. Mater. 34, 291–299 (2000)
Guervenou J. et al.: Experimental design methodology and data analysis technique applied to optimize an organic synthesis Chemometr. Intell. Lab. Syst. 63, 81–89 (2002)
Anunziata O.A., Beltramone A.R., Cussa J.: Studies of Vitamin K3 synthesis over Ti-containing mesoporous material. Appl. Catal. A Gen. 270, 77–85 (2004)
Du G. et al.: Statistical design and modeling of the process of methane partial oxidation using V-MCM-41 catalysts and the prediction of the formaldehyde production Appl. Catal. A Gen. 313, 1–13 (2006)
Montgomery D.C.: Design and Analysis of Experiments, 4th edn. Wiley, New York (1997)
Querol X. et al.: Synthesis of zeolites from coal fly ash: an overview. Int. J Coal Geol. 50, 413–423 (2002)
Del Vecchio R.J.: Understanding Design of Experiments: A Primer for Technologists. Hanser/Gardner, Cincinnati (1977)
Moreno N. et al.: Pure zeolites synthesis from silica extracted from coal fly ashes. J. Chem. Technol. Biotechnol. 77, 274–279 (2002)
Kettinger R. et al.: Preparing zeolite Na-A. PQ corporation, US Patent (1979)
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Matlob, A.S., Kamarudin, R.A., Jubri, Z. et al. Response Surface Methodology for Optimizing Zeolite Na-A Synthesis. Arab J Sci Eng 38, 1713–1720 (2013). https://doi.org/10.1007/s13369-012-0382-3
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DOI: https://doi.org/10.1007/s13369-012-0382-3