OJMetal  Vol.3 No.3 , September 2013
Synthesis of Solid Acid Catalysts Based on TiO2- SO42-and Pt/TiO2- SO42- Applied in n-Hexane Isomerization
ABSTRACT
The physicochemical properties and catalytic activity of pure and sulfated titanium oxide (TiO2 and ) is described in this work. Titanium hydroxide synthesized by the sol-gel method was impregnated with a 1 N H2SO4 solution, varying amount of sulfate ions () in the range from 10 to 20 wt%. Pure and modified hydroxides were calcined at 500°C for 3 h and then characterized by TGA-DTG, XRD, BET, FT-IR, potentiometric titration with n-butylamine and 2-propanol dehydration. Catalytic activity of materials was tested in the n-hexane isomerization at 350°C. The results showed that TiO2 and mainly developed anatase phase. All have acceptable specific surface area (95-105 m2/g). Potentiometric titration with n-butylamine revealed that showed higher acidity (430-530 mV) than compared to pure TiO2 (﹣15 mV), indicating that this oxide only has weak acidity. The results showed good relationship between acidity determined by potentiometric titration with n-butylamine and the catalytic activity evaluated by 2-propanol dehydration and n-hexane isomerization. Titanium oxide with 20 wt% ofions was the material that demonstrated the highest catalytic activity for both reactions.


Cite this paper
J. Enríquez, L. Lajas, R. Alamilla, E. Martín, P. Alamilla, E. Handy, G. Galindo and L. Serrano, "Synthesis of Solid Acid Catalysts Based on TiO2- SO42-and Pt/TiO2- SO42- Applied in n-Hexane Isomerization," Open Journal of Metal, Vol. 3 No. 3, 2013, pp. 34-44. doi: 10.4236/ojmetal.2013.33006.
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