IMPACT OF MAGNETIC NANOPARTICLES ON THE KINETICS OF BIODESULFURIZATION OF DIESEL
The need to reduce sulfur content has become imperative. The sulfur content of hydrodesulfurized fuel are still high because of the presence of some sulfur compounds that are either recalcitrant or are refractory. The regulatory agencies are mounting pressure because the combustion of sulfur containing fuel produce substances that are harmful to the environment. Biodesulfurization readily comes handy as a complimentary method to hydrodesulfurization, however, biodesulfurization like other bioreactions is slow. For biodesulfurization to play the complimentary role effectively, deliberate attempt must be made to make it faster. This study in an attempt to do that has synthesized a magnetic nanoparticle, characterized it using Telescopic Electron Microscope, TEM and X-ray Electronic Microscope and then coat the synthesised particle with an isolated Pseudomonas stutzeri. The impact of the nanoparticle on the biodesulfurization activity of Pseudomonas stutzeri on diesel was investigated. The synthesized magnetic nanoparticles have a size range of predominantly between 9.75 and 10.25 nm. The results from this work showed a high level of desulfurization of 88% for coated bacteria as compare to 68% for uncoated bacteria. A kinetic model describing the desulfurization was also developed. In all cases, the coated organism desulfurise better than the uncoated one. The simulated data from the developed model were found to fit well to all the experimental data.