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Substrate preferences in biodesulfurization of diesel range fuels by Rhodococcus sp. strain ECRD-1
Roger C Prince1, Matthew J Grossman
1ExxonMobil Research and Engineering Co., Annandale, New Jersey 08801, USA. Roger.C.Prince@ExxonMobil.com
Abstract:
The range of sulfur compounds in fuel oil and the substrate range and preference of the biocatalytic system determine the maximum extent to which sulfur can be removed by biodesulfurization. We show that the biodesulfurization apparatus in Rhodococcus sp. strain ECRD-1 is able to attack all isomers of dibenzothiophene including those with at least four pendant carbons, with a slight preference for those substituted in the alpha-position. With somewhat less avidity, this apparatus is also able to attack substituted benzothiophenes with between two and seven pendant carbons. Some compounds containing sulfidic sulfur are also susceptible to desulfurization, although we have not yet been able to determine their molecular identities.
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