Textural properties of prepared alumina, stania and iron oxide catalysts

• Galal Elmanfe Elmanfe

  Chemistry Department, Faculty of Science, Omar–AlMukhtar University, El-Beida, Libya

  Author

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 α_S curves shows the agreement between the values of specific surface area, S_BET, S_t and S_S.

Arata, K. (1990). Solid Superacids. Adv. Catal., 37: 165-212.

Brunauer, S., P. H. Emmett and T. Teller. (1938). Adsorption of gases in multimolecular layers. J. Am. Chem. Soc., 60: 309–319.

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 SO2−4/ZrO2 catalysts. J. Catal., 197: 406-413

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.

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.

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). 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/Zr1−xSnxO2. Appl. Catal. A: General, 253: 237-247.

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.

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.

• PDF

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Copyright of the articles Published by Almukhtar Journal of Science (MJSc) is retained by the author(s), who grant MJSc a license to publish the article. Authors also grant any third party the right to use the article freely as long as its integrity is maintained and its original authors and cite MJSc as the original publisher. Also, they accept the article remains published by the MJSc website (except in the occasion of a retraction of the article).