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The oxidation of diesel fuel sample was carried out using tertiary butyl hydroperoxide oxidant in the presence of two commercially available Ni-Mo catalysts. The studies were carried out by changing reaction conditions such as treat ratios (oxidant/sulfur molar ratio), WHSV, temperature, etc., to achieve product diesel with sulfur content of <20 ppm. The results of the study on diesel were compared by carrying out similar experiments on model compound, namely, dibenzothiophene dissolved in sulfur-free liquid paraffin oil. GC-PFPD instrument was used to identify and group different sulfur compounds present in diesel and the kinetics of desulfurization was studied.
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Selvavathi et al. (2008) studied this question.
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