Improvement of Biodesulfurization Rate by Assembling Nanosorbents on the Surfaces of Microbial Cells

Shan, Guobin; Zhang, Huaiying; Cai, Weiquan; Jian-wei, Xing; Liu, Huizhou

doi:10.1529/biophysj.105.073718

Cited by 50 publications

(22 citation statements)

References 6 publications

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“…However, product inhibition has not been fully appreciated as the main impediment to developing improved biocatalysts, and effective means of overcoming the inhibition caused by 2-HBP are just beginning to be developed [33]. Only about half of the DBT consumed can be accounted for as 2-HBP in some biodesulfurization studies, implying that 2-HBP accumulates intracellularly [34][35][36][37].…”

Section: Discussionmentioning

confidence: 99%

Desulfurization of Dibenzothiophene by Pseudomonas fluorescens (UCP 1514) Leading to the Production of Biphenyl

Silva¹,

Schwartz²,

Souza³

et al. 2018

Recent Insights in Petroleum Science and Engineering

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Dibenzothiophene (DBT) is a typical recalcitrant thiophenic sulfur component of fuels, and its desulphurization has been a model reaction in the treatment of these compounds. Based on this information, the potential of Pseudomonas fluorescens (UCP 1514) on the desulfurization of dibenzothiphene was studied, in order to use it for reducing the sulfur content of diesel oil in compliance with environmental regulations. The result of biodegradation by the bacteria was determined by undertaking high-performance liquid chromatography of the metabolites produced. These can also be identified by gas chromatography with a mass spectrometry detector, and doing so revealed a sulfur-free product, biphenyl, as the final product of the degradation process. The results showed a decrease of 73% in dibenzothiophene content, which means that P. fluorescens removes sulfur from dibenzothiophene with a good selectivity to form biphenyl. These promising results indicate that P. fluorescens has an interesting potential to degrade sulfur-containing compounds in diesel oil and thereby could help in removing sulfur content from diesel oil. The process of microbial desulfurization described herein can be used particularly after carrying out hydrodesulfurization. Consequently, the sulfur content could be reduced even further. Applying P. fluorescens UCP 1514 in dibenzothiophene could help to understand the nature of the biodegradation process and to achieve the regulatory standards for sulfur level in fossil fuels.

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Section: Discussionmentioning

confidence: 99%

Desulfurization of Dibenzothiophene by Pseudomonas fluorescens (UCP 1514) Leading to the Production of Biphenyl

Silva¹,

Schwartz²,

Souza³

et al. 2018

Recent Insights in Petroleum Science and Engineering

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“…Alumina is used in the chemical industry, metallurgy, pharmaceutical and food industries due to the cheapness and having good mechanical and optical properties. 6,7 Al 2 O 3 has been widely used as catalyst and catalyst support, and also it has extensive applications in ceramic industry and structural composites. 8 The Surface of mostly ceramic NPs such as alumina is polar and hydrophilic nature.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Alumina Nanoparticles: A Dispersion Study in Organic Media

Soleimani

Zamani

2017

ACSi

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The alumina nanoparticles (NPs) have been synthesized from reaction between alum with ammonia and then calcined the precipitate at 1200 °C for 4 h. Its surface was modified by oleic acid (OA) and trimethoxyvinylsilane (TMVS) in o-xylene at 50 °C. The alumina NPs and its modified were characterized by XRD, FT-IR, SEM, EDX and TGA. The TGA analysis indicated that the grafting amount of OA and TMVS were 10.5 and 8.0% respectively. The dispersion of modified NPs was determined in monomers such as methyl methacrylate (MMA), butyl acrylate (BuA) and styrene (St) and in solvents such as ethanol, hexane and acetone. The experimental results showed that the highest dispersion was happened NPs modified by oleic acid in n-hexane, while the highest dispersion was observed NPs modified by TMVS in acetone. The results indicate that NPs modified by oleic acid formed a stable dispersion in MMA and BuA. The highest amount of dispersion happened NPs modified by oleic acid in MMA and BuA in initial weight of 5 and 2.5% respectively, while stable dispersion is formed in styrene when TMVS is used as modifier. The highest amount of dispersion was happened NPs modified by TMVS in styrene in initial weight of 2.5%.

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“…The partial challenge that is encountered by BDS through the rate of transfer of sulphur heterocyclic compounds from oil phase into the microbial cell is also hindered during BDS, which affects the full application of BDS at industrial scale. Goubin et al [177] assembled γ-Al 2 O 3 nanosorbents on Pseudomonas delafieldii R-8 strain. It was shown from the result that adsorption rate was higher when compared to the rate of BDS.…”

Section: Issues In Biodesulfurization For Its Industrial Applicationmentioning

confidence: 99%

Biodesulfurization of Petroleum Distillates—Current Status, Opportunities and Future Challenges

2017

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Sulfur oxide (SO 2 ) and hydrogen sulfide (H 2 S) are considered as one of the major air pollutants in the world today. In addition, high sulfur levels in petroleum distillates can promote the deactivation of catalysts through poisoning in fluidized catalytic cracking (FCC) during hydrocracking of the heavy distillates to lighter ones. The presence of high sulfur-containing compounds in the process streams could cause corrosion of piping and fittings and equipment, thereby damaging the pipelines and leading to air emissions of sulfur-containing compounds, which are undesirable for mankind and his environment. In many cases, a large quantity of SO x is released into the atmosphere when petroleum distillates that contain substantial amount of sulphur-containing compounds are used as fuel and combust. In this article, a short overview of different desulfurization methods that are employed to remove sulfur from petroleum distillates is provided. In particular, the review concentrates on biodesulfurization technique. In addition, this article intends to provide its readers current status of biodesulfurization (BDS). It critically analyses the trend in the development of the technology to showcase its strength and weakness that could pave a way for future opportunities. Approaches that are suitable to remediate sulfur-contaminated environment are discussed as well. Lastly, speculations on future directions or opportunities that require exploration are provided as a way of provoking the thoughts of researchers in this field.

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Improvement of Biodesulfurization Rate by Assembling Nanosorbents on the Surfaces of Microbial Cells

Cited by 50 publications

References 6 publications

Desulfurization of Dibenzothiophene by Pseudomonas fluorescens (UCP 1514) Leading to the Production of Biphenyl

Desulfurization of Dibenzothiophene by Pseudomonas fluorescens (UCP 1514) Leading to the Production of Biphenyl

Surface Modification of Alumina Nanoparticles: A Dispersion Study in Organic Media

Biodesulfurization of Petroleum Distillates—Current Status, Opportunities and Future Challenges

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