Equipment corrosion, complex product separation, disposal of high amount of corrosive mineral acids and difficulty in catalyst recovery has led to the replacement of homogeneous catalyst recovery with alternate heterogeneous catalyst system. Solid acid catalysts have proved to be a better substitute for Acylation and Alkylation reactions. Heteropolyacids particularly Cssubstituted keggin-type12- Tungstophosphoric acid was synthesized. SBA-15,owing to its low reactivity with the Keggin anions best suited to support Cs-HPW was prepared. Both catalyst and support were characterization for their surface area, pore volume and pore size distribution using BET method. The catalyst system made will be used for trans esterification reactions.

Key words:Keggin, Solid Acids, Trans-Esterification Reaction, Cs-H₃ PW₁₂O₄₀ , SBA-15