1 kjmol 145 23rd 25th june 2010 3rd icyc 2010

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Unformatted text preview: al importance. In this study, an acidic solid catalyst was prepared and used to study the liquid -phase alkylation of phenol with tertbutanol (TBA) as an alkylating agent. The sulfanilic acid was immobilized onto rice husk ash (RHA) sili ca via 3-(chloropropyl)triethoxysilane to form a new catalyst denoted as RHAPhSO 3H. The BET surface area 2 −1 was found to be 308 m g with a narrow pore diameter of 8.93 nm. Pyridine -FT-IR adsorption study revealed the presence of Brønsted acid sites. Elemental analysis of RHAPhSO 3H by EDX and CHN confirmed the presence of S (10.88 %) and N (10.37 %). In alkylation of phenol, RHAPhSO 3H yielded 95 % conversion of TBA at 120 °C with mole ratio of TBA:phenol = 1:1 with high selectivity towards 4 -tertbytylphenol (4-TBP = 52 %) with some by products. The high conversion and selectivity for 4 -TBP could be due to its strong acidity as observed by Pyridine-FT-IR. The catalyst can be reused several times without significant loss of catalytic activity. MAT-O8 LOW TEMPERATURE SYNTHESIS OF ZnSnO3 AT Al-Hinai and MH Al-Hinai Department of Chemistry, College of Science, Sultan Qaboos Unive rsity, Alkoud, Sultanate of Oman E-mail: muna.h@windowslive.com ZnSO3 particles were synthesized at low temperature. The pH of a solution containing stoichiometric 2+ 4+ amounts of Zn and Sn was controlled in order to precipitate the ZnSnO3 in one step at low temperature. The particles produced where identified using powder X -Ray Diffraction. Scanning electron microscope images show that the particles are monodispersed cubes with an average size of two microns. 146 3rd ICYC 2010 Universiti Sains Malaysia MAT-O9 23rd-25th June 2010 MECHANOCHEMICAL SYNTHESIS AND CHARACTERIZATION OF CALCIUM DOPED CERIA SYSTEM 1 P. S. Ong, 1,2 Y. P. Tan, Y. H. Taufiq-Yap and Z. Zainal 1,2 1 Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia 2 Putra Laboratory for Catalysis Science and Technology, Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia E-mail: yptan@science.upm.edu.my Doped ceria is considered the...
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