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    STUDIA CHEMIA - Issue no. 3 / 2015  
         
  Article:   CATALYTIC WET AIR OXIDATION OF PHENOL USING METAL MODIFIED ZEOLITIC VOLCANIC TUFFS.

Authors:  HOREA BEDELEAN, MIRCEA DARABANTU, ANDRADA MĂICĂNEANU. 		 
       
         
  Abstract:   Zeolitic volcanic tuff modified with metals (Cu, Ce, Co, Ni, Zn, Mn and Fe) by ionic exchange was tested as catalyst in wet air oxidation process for phenol removal from aqueous solutions. The influence of temperature, air flow, catalyst quantity, phenol concentration, reaction time and catalyst grain size were considered. Also, the reaction was tested in two reactor types: batch and fixed bed. In the case of the batch reactor maximum value for the process efficiency, about 34%, was reached in the following conditions: 60°C, 60 L/h, 4 g catalyst, 1000 mg/L and 6 h reaction time. In case of the fixed bed reactor higher efficiencies were obtained, in the same reaction conditions. 

Keywords: zeolite, phenol, catalytic wet air oxidation, chemical oxygen demand
 
         
     
         
         
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