Use of seydi?ehir alumina as a support for CO oxidation catalysts

An Al 2 O 3 sample obtained from Seydi y ehir Eti Alüminyum A. z was treated and characterized for its potential use as a catalyst support. Atomic absorption spectroscopy and flame photometry characterization revealed the presence of 95.52% Al 2 O 3 , 4.44% Na 2 O, and 0.043% Fe 2 O 3 in the original sample. Both n -Al 2 O 3 and f -Al 2 O 3 phases were identified in the crystalline structure by X-ray diffraction analysis. However, f -Al 2 O 3 was found to be the phase in abundance. The BET surface area of the original sample was found to be 40.85 m 2 /g. The original sample was treated in various concentrations of hydrochloric acid to remove Na 2 O impurity. The acid concentration was optimized for the Na 2 O removal efficiency and surface area enhancement. The optimum HCl concentration was found to be 1 M. 1 Pt/Al 2 O 3 catalysts prepared from these supports and a reference support (Johnson Matthey n -Al 2 O 3 ) were tested for CO oxidation reactions. Catalysts prepared fromSeydis¸ehir alumina showed reasonable activity for the CO oxidation reaction.