Catalytic liquid-phase oxidation of toluene to benzoic acid
Makaleler > Tam Makale · 2008
Yazarlar: Ali GIZLI, Gülin ERSÖZ, Erden ALPAY, SÜHEYDA ATALAY
CHEMICAL ENGINEERING & TECHNOLOGY, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2008, cilt 31, ss 409-416
Özet
The production of benzoic acid from toluene in the liquid phase with pure oxygen was studied. Investigations have been carried out with a view to determining the most suitable reaction conditions with respect to operating variables including oxygen flow rate, reaction temperature, batch time and catalyst loading. In a series of batch experiments carried out at 4 atm, the optimum values of mole ratio of oxygen to toluene, temperature, reaction time, and catalyst loading were found to be 2, 157 degrees C, 2 h and 0.57 g/L, respectively. In addition, a kinetic study was carried out by taking into consideration the optimum reaction conditions. The model dependent on the formation of benzyl radical was found to be feasible for describing the catalytic oxidation of toluene to benzoic acid in the liquid phase. The activation energy was determined as 40 kJ/mol.