Textural properties of prepared alumina, stania and iron oxide catalysts
DOI:
https://doi.org/10.54172/mjsc.v29i1.265Keywords:
Alumina, Stania, Iron oxide, Texture, PorosityAbstract
Aluminum, Iron and Tin oxides were prepared by precipitation method using ammonia solution. The prepared gels were dried and calcined for three hours at 873 K to give the appropriate metal oxides Al2O3, Fe2O3 and SnO2. These samples have been characterized by means of nitrogen adsorption at 77 K. Textural data obtained from N2 adsorption show that alumina has higher surface area than other oxides indicating the presence of small particle size in alumina samples. Moreover, these oxides have mixed porosity ranging from micro and mesopores. The analysis of t- and αS curves shows the agreement between the values of specific surface area, SBET, St and SS.
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References
Arata, K. (1990). Solid Superacids. Adv. Catal., 37: 165-212. DOI: https://doi.org/10.1016/S0360-0564(08)60365-X
Brunauer, S., P. H. Emmett and T. Teller. (1938). Adsorption of gases in multimolecular layers. J. Am. Chem. Soc., 60: 309–319. DOI: https://doi.org/10.1021/ja01269a023
Gates, B. C. (1992). Catalytic chemistry. John wiley & sons, Inc., New York. p. 378.
Gregg, S. J. and K. S. W. Sing. (1982). Adsorption, surface area and porosity. 2nd Edn., Academic Press, London.
Hua, W., A. Goeppert, and J. Sommer. (2001). H/D Exchange and isomerization of small alkanes over unpromoted and Al2O3-Promoted SO −4/ZrO2 catalysts. J. Catal., 197: 406-413. DOI: https://doi.org/10.1006/jcat.2000.3106
Khalaf, H. A. (2005). Characterization and catalytic activity of acidified aluminas. PhD Thesis, Minia University, Egypt.
Khalaf, H. A. (2009). Textural properties of sulfated iron oxide promoted with Al(III). Monatshefte für Chemie., 140: 669-674. DOI: https://doi.org/10.1007/s00706-009-0118-6
Khalaf, H. A., S. E. Mansour and E. A. El-Madani. (2010). Copper-modified sulfated stannia; surface properties and catalytic activity towards phenol hydroxylation. Monatshefte für Chemie., 141: 729-735. DOI: https://doi.org/10.1007/s00706-010-0321-5
Khalaf, H.A., G. A. H. Mekhemer, S. A. A. Mansour and A. K. H. Nohman. (2007). Phosphated alumina catalysts: Surface properties and reactivity towards 2-PrOH decomposition. Monatshefte für Chemie., 138: 641-648. Pereira, A. L. C., S. G. Marchetti, A. A. P. Reyes and C. Range. (2008). DOI: https://doi.org/10.1007/s00706-007-0674-6
Effect of iron on the properties of sulfated zirconia. App. Catal. A: General, 334: 187-189. Sakthivel, R., H. A. Prescott, J. Deutsch, H. Lieske and E. Kemnitz. (2003). Synthesis, characterization, and catalytic activity of SO4/Zr −xSnxO2. Appl. Catal. A: General, 253: 237-247. DOI: https://doi.org/10.1016/S0926-860X(03)00523-4
Schoonheydt, R.A. (1984). in: F .Delnnay (Ed.), Characterization of heterogeneous catalysis. Marcel Dekker, New York, p.125.
Sing, K.S.W., D.H. Everett, R. A. W. Haul, L. Moscou, R. A. Pierotti, J. Rouquerol and T. Siemieniewska. (1985). Reporting physisorption data for gas solid systems with special reference to the determination of surface area and porosity. Pure Appl. Chem., 57: 603-619. DOI: https://doi.org/10.1351/pac198557040603
Thomas, J. M. and W. J. Thomas. (1996). Principles and practice of heterogeneous catalyst. New York, VCH, weinhiem. p.257.
Webb, P.A. and C. Orr. (1997). Analytical methods in fine particle technology, Micromeritics Instrument Corporation. Norcross, Georgia, USA.
Chap.1-4. Yadav, G. D. and J. J. Nair. (1999). Sulfated zirconia and its modified versions as promising catalysts for industrial processes. Microporous Mesoporous Mater., 33: 1- 48. DOI: https://doi.org/10.1016/S1387-1811(99)00147-X
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