Microbial desulfurization of model and straight-run diesel oils

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Abstract

The desulfurization kinetics of Nocardia globerula R-9 was investigated initially in a model system consisting of dibenzothiophene (DBT) dissolved in dodecane. The ability to desulfurize straight-run diesel oil by resting cells of this strain was also evaluated. The course of desulfurization of DBT in dodecane could be represented by the Michaelis-Menten equation. The desulfurization of DBT and 4,6-dimethyl dibenzothiophene (4,6-DMDBT) in a mixture of the two proceeded simultaneously without preference for either of them. The sulfur content of the straight-run diesel oil could be reduced from 1807 to 741 mg dm-3 by treatment with resting cells of this strain, at a mean rate of 5.1 mmol sulfur kg-1 h-1. This showed that Nocardia globerula R-9 could be a potential bacterium for reducing the sulfur content of petroleum products. © 2003 Society of Chemical Industry.

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Mingfang, L., Zhongxuan, G., Jianmin, X., Huizhou, L., & Jiayong, C. (2003). Microbial desulfurization of model and straight-run diesel oils. Journal of Chemical Technology and Biotechnology, 78(8), 873–876. https://doi.org/10.1002/jctb.862

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