Title of article :
Preparation and Characterization of Bimetallic Catalyst (NiO – CoO) for Desulfurization of Gas Oil
Author/Authors :
ugal, jalil r. university of baghdad - college for science for women - department of chemistry, Iraq , hussein, asmaa h. university of baghdad - college of science for women - department of chemistry, Iraq
From page :
75
To page :
83
Abstract :
In this study NiO - CoO bimetallic catalysts are prepared with two Ni/Co ratios (70:30 and 80: 20) using the precipitation method of nitrate salts. The effects of Ni /Co ratio and preparation methods on the catalyst are analyzed by using different characterization techniques, i.e. atomic absorption (AA) , XRD, surface area and pore volume measurements according to the BET method .The results indicate that the best catalyst is the one containing the percentage of Ni :Co ( 70 : 30 ). Experiments indicate that the optimal conditions to prepare catalyst are stirring for three hours at a temperature of 60oC of the preparation ,pH= (8-9) , calcination temperature at 400oC for two hours using the impregnation method.The catalyst activity is studied through the application in the process of oxidative desulfurization of gas oil fuel . The optimal conditions for deep oxidative desulfurization processes are : catalysts 3% , 2 gm. Na2 CO3 , refluxe time 3 hours at 400 C , using a mechanical stirrer at moderate speed (700 rpm), the volume ratio of gas oil : H2O2 : acetic acid is 10: 1: 0.5 and extracted with 1:1 ratio of acetonitrile to the gas oil for three times .The results indicate that the catalysts are efficient to remove sulfur from gas oil depending on temperature, time, concentration of hydrogen peroxide H2O2 30 % and solvent used for extraction.The efficiency of the best catalyst gives a maximum sulfur removal reaching 68.97%.
Keywords :
Bimetallic Catalyst , N i , Co , Desulfurization , Gas Oil.
Journal title :
Baghdad Science Journal
Journal title :
Baghdad Science Journal
Record number :
2691794
Link To Document :
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