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|Title:||Role of acidity for the production of carvacrol from carvone over sulfated zircona|
Ammonia - TPD
|Abstract:||A simple and eco-friendly process for the isomerization of carvone to carvacrol in the presence of SO<sub>4</sub><sup>2</sup><sup>−</sup>/ZrO<sub>2</sub> catalyst has been described. The reaction is conducted without solvent at moderate temperature with reaction times of 1 to 2 h. In most instances, nearly quantitative yield of carvacrol is obtained without any by-products. The total acidity, different acid concentration, zircona phases and crystallites size were co-related with the catalytic activity. Activation energy is found to be 11.317 kJ/mol using 8% SO<sub>4</sub><sup>2</sup><sup>−</sup>ions modified zircona. The bulk and surface properties of the prepared catalysts are examined by X-ray powder diffraction, BET surface area and ammonia-TPD.|
|ISSN:||0975-0991 (Online); 0971-457X (Print)|
|Appears in Collections:||IJCT Vol.18(1) [January 2011]|
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