JSEMAT  Vol.4 No.1 , January 2014
Development of Alkylation Toluene with Methanol for Fuel on Modified ZSM-5 Zeolites by Amphoteric Surfactant
Abstract: Methylation of toluene over ZSM-5 zeolites modified by the introduction of Sr of 2.5%, 5%, and 10% by weight was studied. Experiments were performed in a fixed bed under the conditions of reaction temperatures between 300°C-500°C, liquid hour space velocity of 4 g toluene/h.g catalyst, methanol to toluene ratio 4:1, and 0.01% of N-Octyl-N-benzyl-N-methylglycine as emulsifier. Data for conversion of toluene and selectivity towards xylene isomers showed that 2.5% Sr/ZSM-5 catalyst has the highest conversion of toluene at 500°C, and the lowest p-xylene selectivity, while 10% Sr/ZSM-5 catalyst has the highest selectivity for p-xylene production. Nevertheless, the catalyst 2.5% Sr/ZSM-5 has the highest selectivity for m-xylene. The two catalysts 2.5% and 5% Sr/ZSM-5 give nearly the same selectivity for the three xylene isomers at all conversions obtained at the reaction conditions under study.
Cite this paper: Morsi, A. , Omar, A. and Almehbad, N. (2014) Development of Alkylation Toluene with Methanol for Fuel on Modified ZSM-5 Zeolites by Amphoteric Surfactant. Journal of Surface Engineered Materials and Advanced Technology, 4, 41-46. doi: 10.4236/jsemat.2014.41007.

[1]   Th. F. Tadros, “In Surfactant in Solution,” Plenun Press, New York, 1984, pp. 1501-1532

[2]   D. O. Shah, “Macro- and Micro-Emulsion, Theory and Applications,” American Chemical Society, Washington DC, 1985.

[3]   J. Drelich, A. Atia, M. Yalamanchil and J. D. Miller, “Formation and Wetting Characteristics of Adsorbed Layers of Unsaturated Carboxylic Acids at a Fluorite Surface,” Journal of Colloid and Interface Science, Vol. 178, No. 2, 1996, pp. 720-732.

[4]   J. A. Mielczarskin and C. Mielczarski, “Determination of Molecular Orientation and Thickness of Self-Assembled Monolayers of Oleate on Apatite by FTIR Reflection Spectroscopy,” The Journal of Physical Chemistry, Vol. 99, No. 10, 1995, pp. 3206-3217.

[5]   P. Somasundaran, “Separation and Purification Methods,” Vol. 1, Marcel Dekker, New York, 1972, p.117.

[6]   P. M. Holland and D. N. Rubingh, “Mixed Surfactant System,” American Chemical Society, Washington DC, 1992.

[7]   J. L. Sotelo, M. A. Vguina, J. L. Valverde and D. P. Serano, “Kinetics of Toluene Alkylation with Methanol over Magnesium-Modified ZSM-5,” Industrial & Engineering Chemistry Research, Vol. 32, No. 11, 1993, 2548-2554.

[8]   M. Guisnet and P. Magnoux, “Coking and Deactivation of Zeolites: Influence of the Pore Structure,” Applied Catalysis, Vol. 54, No. 1, 1989, pp. 1-27.

[9]   D. M. Bibby, R. F. Dowe and G. M. Mcleellan, “Coke Formation in High-Silica Zeolites,” Applied Catalysis A: General, Vol. 93, No. 1, 1992, pp. 1-34.

[10]   A. M. A. Omar, “Separation of Emulsifiable Oil from a Flotation Solution by Surface Tension Control,” Adsorption science & Technology, Vol. 19, No. 1, 2001, pp. 91-100.

[11]   S. G. T. Bhat, “Selectivity for Xylene Isomers in the Reaction of Alkylation of Toluene with Methanol on Zeolite Catalysts,” Journal of Catalysis, Vol. 75, No. 1, 1982, pp. 196-199.

[12]   S. M. Csicsery, “Acid Catalyzed Isomerization of Dialkylbenzenes,” The Journal of Organic Chemistry, Vol. 34, No. 11, 1969, pp. 3338-3342.