Biodesulfurization of gas oil using inorganic supports biomodified with metabolically active cells immobilized by adsorption

Dinamarca, M. Alejandro; Ibacache-Quiroga, Claudia; Baeza, P.; Galvez, S.; Villarroel, M.; Olivero, Pablo; Ojeda, J.

doi:10.1016/j.biortech.2009.11.086

Cited by 66 publications

(36 citation statements)

References 31 publications

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“…The number of immobilized cells was measured by loses of turbidity of solution at 600 nm (OD 600 ). The biocatalysts were designated as bacterial cell/solid systems, where the bacterial cells correspond to P. aeruginosa and the solid corresponds to the polymeric supports [38]. For morphological studies on biocatalyst scanning electron microscope (MIRA TESCAN SEM) images were prepared before and after cell immobilization process.…”

Section: Microorganism and Cell Immobilizationmentioning

confidence: 99%

“…The bands at 3418. 43 [38,39]. The methods for bacterial cells immobilization considered the cells entrapment and cells adsorption [26,33].…”

Section: Cells Immobilizationmentioning

confidence: 99%

“…The methods for bacterial cells immobilization considered the cells entrapment and cells adsorption [26,33]. However, the adsorption of cells on polymer support require more complex chemical and biochemical analysis that also consider non-electrostatic interactions and bacterial hydrophobic behaviour [38]. Although the interactive forces are important in the adsorption process of bacteria on solids, other physical and biological factors can also influence this process, such as the size of bacterial cells, ionic strength and the surface structure of the supports [39][40][41]].…”

Section: Cells Immobilizationmentioning

confidence: 99%

“…Thus, the major level of BDS activity observed in biocatalysts can be explained by high no-electrostatic interaction between the cells and supports [42]. So the access of P. aeruginosa cells to the hydrophobic phase is facilitated, in comparison to whole non-adsorbed cells [38].…”

Section: Cells Immobilizationmentioning

confidence: 99%

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Biodesulphurization of thiophene as a sulphur model compound in crude oils by Pseudomonas aeruginosa supported on polyethylene

Karimi

Sadeghi

Salimi

2017

Ecological Chemistry and Engineering S

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Abstract:A new biodesulphurization method has been considered using Pseudomonas aeruginosa supported on polyethylene (PE) for biodesulphurization (BDS) of thiophene as an aromatic sulphur model compound of crude oils. Also the biodegradation of thiophene has been modified in the presence of potassium hexacyanoferrate(III) as a terminal electron acceptor to approach the maximum biodesulphurization efficiency. The obtaining results according to UV-Spectrophotometry at 240 nm, 83.3% of thiophene at the primary concentration of 50 mg/dm 3 , pH = 7, by 0.5 g of biocatalyst in 37°C after 4 h of contact time has been removed. The bacterial cells exhibited a greater and faster biodegradation in the presence of potassium hexacyanoferrate(III) and 94.8% of thiophene has been removed after 3 h of contact time. Kinetic study predicted chemisorption of thiophene on the surface of the biocatalyst, as it followed the pseudo-second-order rate equation. Morphology and surface functional groups of the biocatalyst have been investigated by SEM and FT-IR, respectively.

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Section: Microorganism and Cell Immobilizationmentioning

confidence: 99%

“…The bands at 3418. 43 [38,39]. The methods for bacterial cells immobilization considered the cells entrapment and cells adsorption [26,33].…”

Section: Cells Immobilizationmentioning

confidence: 99%

Section: Cells Immobilizationmentioning

confidence: 99%

Section: Cells Immobilizationmentioning

confidence: 99%

See 2 more Smart Citations

Biodesulphurization of thiophene as a sulphur model compound in crude oils by Pseudomonas aeruginosa supported on polyethylene

Karimi

Sadeghi

Salimi

2017

Ecological Chemistry and Engineering S

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“…In addition, HDS is not effective in removing refractory heterocyclic sulfur species such as DBT and its derivatives, especially 4,6-dimethyldibenzothiophene (4,6-DMDBT) [4,5]. Oxidative desulfurization (ODS) [6,7], extractive desulfurization (EDS) [8,9], adsorptive desulfurization [10,11] and biodesulfurization (BDS) [12,13] are other desulfurization techniques that have the potential to produce ultra clean fuel. In ODS, the sulfur species are oxidized to sulfone by chemical reaction using oxidants such as hydrogen peroxide (H 2 O 2 ), nitric acid, ozone, air and others.…”

Section: Introductionmentioning

confidence: 99%

PREPARATION AND CHARACTERIZATION OF Cu-Fe/TiO2 PHOTOCATALYST FOR VISIBLE LIGHT DEEP DESULFURIZATION

Kait¹

2016

MJAS

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A photooxidative system for deep desulfurization of model diesel fuel was explored. Nanoparticles of anatase titania (TiO 2 ) were synthesized via sol-gel hydrothermal method. The TiO 2 was further modified with bimetallic Cu-Fe using wet-impregnation method followed by calcination process in order to extend the activity region of the photocatalyst to visible-light. A series of bimetallic 2.2 wt% Cu-Fe/TiO 2 photocatalysts with different Cu:Fe mass compositions were characterized for their physical, chemical and optical properties using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), diffuse reflectance UV-visible spectroscopy (DR-UV-Vis), Fourier Transform Infrared Spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET) surface area analysis. The performance of the photocatalysts was evaluated for photooxidation of dibenzothiophene (DBT) as the sulfur species from model oil in the presence of hydrogen peroxide, H 2 O 2 under 500 W visible light illumination. The highest sulfur conversion of 82.36 % was observed for photocatalyst with 10:1 Cu:Fe mass composition.Keywords: photocatalyst, titania, oxidation, desulfurization, visible light, copper-iron Abstrak Sistem fotopengoksidaan untuk proses nyahsulfur daripada model minyak diesel dikaji. Nanopartikel titania (TiO 2 ) dengan fasa anatas disediakan menggunakan kaedah hidrotermal sol-gel. Pengubahsuaian dengan dwilogam Cu-Fe dilakukan terhadap TiO 2 menggunakan kaedah impregnasi basah diikuti dengan proses pengkalsinan untuk melanjutkan aktiviti fotokatalis ke bahagian cahaya tampak. Siri fotokatalis dwilogam 2.2 wt% Cu-Fe/TiO 2 dengan komposisi jisim Cu:Fe yang berlainan dicirikan untuk menentukan sifat-sifat fizikal, kimia dan optik menggunakan pembelauan sinar-X (XRD), pemancaran medan mikroskopi imbasan elektron (FESEM), mikroskopi transmisi elecktron beresolusi tinggi (HRTEM), spektroskopi pantulan resapan ultraungu-tampak (DR-UV-Vis), spektroskopi transformasi Fourier inframerah (FTIR) dan analisis luas permukaan BrunauerEmmett-Teller (BET). Kajian terhadap fotopengoksidaan dibenzothiophene (DBT) sebagai spesis sulfur di dalam model minyak menggunakan fotokatalis tersebut dilakukan dalam kehadiran hidrogen peroksida, H 2 O 2 di bawah sinaran cahaya tampak 500 W. Prestasi tertinggi penukaran sulfur yang tercapai adalah 82.36 %, daripada fotokatalis yang mempunyai komposisi jisim untuk Cu:Fe sebanyak 10:1.

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Enhancement of BDS Efficiency

2018

Biodesulfurization in Petroleum Refining

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Biodesulfurization of gas oil using inorganic supports biomodified with metabolically active cells immobilized by adsorption

Cited by 66 publications

References 31 publications

Biodesulphurization of thiophene as a sulphur model compound in crude oils by Pseudomonas aeruginosa supported on polyethylene

Biodesulphurization of thiophene as a sulphur model compound in crude oils by Pseudomonas aeruginosa supported on polyethylene

PREPARATION AND CHARACTERIZATION OF Cu-Fe/TiO2 PHOTOCATALYST FOR VISIBLE LIGHT DEEP DESULFURIZATION

Enhancement of BDS Efficiency

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