Abstract
Monometallic and bimetallic noble metal supported catalysts have been tested for the catalytic glycerol oxidation to lactic acid. Modification of zirconia, (ZrO2) using CaO, which is an alkaline earth metal as the base source and Ce as the metal source to give, 30wt%CaxCey/ZrO2 was investigated. The catalysts were prepared using co-precipitation method at different of Cax to Cey ratios (x:y = 1.0:0.5 – 1.0:3.0) and subsequently calcined at 800 °C. Subsequently, the glycerol reaction to lactic acid was carried out at a 250 °C for 2 h in a base free condition using pure glycerol. The interaction between the metallic sites and CeO2 support showed was characterized to elucidate the developed morphology of catalyst. The textural and structural properties of the catalysts were studied using Field emission scanning electron microscope (FESEM) and Transmission electron microscope (TEM). It was found that the morphology of the catalyst well developed and contribute to the significant reaction activity through the reaction mechanism. The spent catalyst also could produce the lactic acid and the morphology is still in a good condition showing capability of cyclability.
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