Sorokhaibam Laxmi Gayatri - A Non-catalytic Deep Desulphurization Process using Hydrodynamic Cavitation

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      Publication Details (including relevant citation   information):

      Suryawanshi, Nalinee B, Bhandari, Vinay M, Sorokhaibam, Laxmi   Gayatri, Ranade, Vivek V Nature Publishing Group  2016 -

      Abstract: A novel approach is developed for   desulphurization of fuels or organics without use of catalyst. In   this process, organic and aqueous phases are mixed in a   predefined manner under ambient conditions and passed through a   cavitating device. Vapor cavities formed in the cavitating device   are then collapsed which generate (in-situ) oxidizing species   which react with the sulphur moiety resulting in the removal of   sulphur from the organic phase. In this work, vortex diode was   used as a cavitating device. Three organic solvents (n-octane,   toluene and n-octanol) containing known amount of a model sulphur   compound (thiophene) up to initial concentrations of 500 ppm were   used to verify the proposed method. A very high removal of   sulphur content to the extent of 100% was demonstrated. The   nature of organic phase and the ratio of aqueous to organic phase   were found to be the most important process parameters. The   results were also verified and substantiated using commercial   diesel as a solvent. The developed process has great potential   for deep of various organics, in general, and for transportation   fuels, in particular. Deep desulphurization or reducing sulphur   content of various organics, in general, and transportation   fuels, in particular to very low level (~10 ppm) is a demanding   but essential operation, especially from pollution point of view.   In the case of transportation fuels, Governments worldwide   mandate sulphur concentration to the level of 15 ppmw and 30 ppmw   in diesel and gasoline respectively 1–3

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