Iron Oxide Catalyst for Oxidative Desulfurization of Model Diesel Fuel

Abstract:

— The catalytic oxidative desulfurization (Cat-ODS) process has been introduced as a new technology to achieve ultra-low sulphur levels in diesel fuels. In this study, the performance of the alumina supported iron oxide based catalysts doped with cobalt, synthesized via wet impregnation method on the Cat-ODS of the model diesel with the total sulphur 500ppm was investigated using tert-butyl hydroperoxide (TBHP) as an oxidizing agent and N,N-dimethylformamide as an extraction solvent. A series of dopant was being screened. Co/Fe-Al₂O₃ (10:90) and Co/Fe-Al₂O₃ (20:80) prepared at 400°C. Overall, the catalytic activity decreased as dopant ratio increased. Catalyst with 10 wt% of Co was successfully removed 96% of thiophene, 100% of DBT and 92% of 4,6-DMDBT in model diesel. Further investigation, potential catalyst that calcined at 400°C contributed higher sulphur removal compared to the catalyst calcined at 500°C. X-ray diffraction analysis (XRD) result showed that Co/Fe-Al₂O₃ (10:90) prepared at 400°C was amorphous, while micrograph of the field emission scanning electron microscopy (FESEM) illustrated an inhomogeneous distribution of various particle sizes. The energy dispersive X-ray analysis (EDX) result have confirmed the presence of Fe and Co in all of the prepared catalyst.

• Periodical: Materials Science Forum (Volume 1010)
• Pages: 418-423
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1010.418
• Online since: September 2020
• Authors: Nor Atiq Syakila Mohd Nazmi*, Wan Nazwanie Wan Abdullah, Farook Adam, Wan Nur Aini Wan Mokhtar, Noorfatimah Yahaya, Nurasmat Mohd Shukri
• Keywords: Bimetallic, Catalyst, Catalytic Oxidative Desulfurization, Model Diesel, Tert-Butyl Hydroperoxide

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