Bordoloi, Naba K. ; Rai, Sudhir K. ; Chaudhuri, Mihir K. ; Mukherjee, Ashis K. (2014) Deep-desulfurization of dibenzothiophene and its derivatives present in diesel oil by a newly isolated bacterium Achromobacter sp. to reduce the environmental pollution from fossil fuel combustion Fuel Processing Technology, 119 . pp. 236-244. ISSN 03783820
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Official URL: http://doi.org/10.1016/j.fuproc.2013.10.014
Related URL: http://dx.doi.org/10.1016/j.fuproc.2013.10.014
Abstract
Thiophenic compounds viz. dibenzothiophene (DBT) and its derivatives present in fossil fuels contribute significantly to air pollution. Here we report for the first time the efficacy of a strain of Achromobacter sp., isolated from a contaminated petroleum–oil soil sample, at efficiently cleaving carbon–sulfur (C–S) bonds in DBT under mesophilic growth conditions. This bacterium utilized DBT and its derivative viz. 4-methyl DBT as the sole source of sulfur and degraded them to 2-hydroxybiphenyl (2-HBP). The 2-HBP was finally converted to 2-methoxybiphenyl (2-MBP) by methylation at the hydroxyl group of 2-HBP suggesting that this bacterium followed sulfur-specific pathway (4S pathway) for deep-desulfurization. Further, 2-MBP is much less pollutant than DBT and therefore, it reduces the environmental pollution from fossil fuel combustion. Gas chromatography and X-ray fluorescence analyses revealed that the resting cells of Achromobacter sp. reduced 7.1% of the total sulfur content of diesel oil, obtained typically by treating 5 mL of diesel oil with 14 g of dry cell, without compromising the quality of diesel oil. For the industrial application, DBT desulfurization was optimized by using response surface methodology. Our study demonstrates that Achromobacter sp. is a potential candidate for biodesulfurization of diesel oil with anticipated application as an eco-friendly biodesulfurizing agent.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier B.V. |
Keywords: | Deep-desulfurization, Achromobacter sp., Fossil fuel processing, Response surface method, Diesel oil |
ID Code: | 126829 |
Deposited On: | 13 Oct 2022 07:02 |
Last Modified: | 13 Oct 2022 07:02 |
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