Conversion of bio-oil extracted from Chlorella vulgaris micro algae to biodiesel via modified superparamagnetic nano-biocatalyst

Nematian, Tahereh; Salehi, Zeinab; Shakeri, Alireza

doi:10.1016/j.renene.2019.08.048

Cited by 87 publications

(20 citation statements)

References 55 publications

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“…Synthesis of MDCV/Fe 3 O 4 particles were performed by the co-precipitation method [86,87] particles were dried at 50℃ for 24 hr and then powdered by mortar [32,88].…”

Section: Mdcv/ Preparationmentioning

confidence: 99%

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

Salehi

Naziri

2021

Preprint

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Background:A novel biosorbent based on defatted Chlorella vulgaris (DCV) as a by-product of the biofuel industry was considered as an economical and inexpensive biosorbent in the form of magnetic modified defatted Chlorella vulgaris (MDCV/Fe3O4) for methylene blue (MB) removal. The lipid extraction was performed on raw Chlorella vulgaris (RCV). Phosphoric acid was selected as a DCV modifier. During acid modification, the variables affecting the biosorption capacity and the residual algae such as temperature (30-70 ), the contact time of DCV with acid (3-9 hr), the concentration of acid (2-6 mol/L), and the ratio of acid volume to DCV (30-70 mL/g) were investigated and optimized using Minitab-18 software. The modified defatted Chlorella vulgaris (MDCV) was prepared by acidification of DCV under optimal conditions. MDCV/ was prepared using the co-precipitation method for easy and low-cost separation of biosorbent. The XRD, FTIR, SEM, EDS, BET, and VSM analyses were performed to identify the structures and characteristics of RCV, DCV, MDCV, and MDCV/. Some experimentsere designed using Minitab-18 software to investigate the effects of temperature (5-45 ), contact time (30-90 min), biosorbent dosage (15-45 mg), initial concentration of MB (20-100 mg/L), and pH (5-9) on the biosorption capacity of MDCV/. The kinetic, isothermal and thermodynamic parameters were investigated on MDCV/.Results:The specific surface area of MDCV/ was 25.20 . RCV, DCV, and MDCV/ had a crystalline structure and MDCV had an amorphous structure. The data were most consistent with Pseudo-second-order and Freundlich models. The maximum biosorption capacity of MDCV/ was calculated in the amount of 32.44‌ mg/g. According to the positive values of and negative values of (-46.56 kJ/mol) and (-0.17 kJ/mol.K), the biosorption of MB on MDCV/ was non-spontaneous, exothermic with a decrease in irregularity.Conclusions:In this study, MDCV/ was applied as the MB biosorbent. Modifications such as lipid extraction, phosphoric acid modification and magnetization improved this biosorbent in its biosorption capacity and separation. Data were optimized in the acid modification and MB biosorption steps. Comparison of the characteristics of MDCV/ with unmodified species confirmed its high efficiency. Kinetic, isothermal and thermodynamic studies were also performed.

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“…Synthesis of MDCV/Fe 3 O 4 particles were performed by the co-precipitation method [86,87] particles were dried at 50℃ for 24 hr and then powdered by mortar [32,88].…”

Section: Mdcv/ Preparationmentioning

confidence: 99%

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

Salehi

Naziri

2021

Preprint

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“…Microalgae because of high oil production efficiency and rapid growth rate and growing ability in the wastewater or non-arable lands has been highly regarded as affordable and economical feedstock for biodiesel production [8]. Among algal species, Chlorella vulgaris, due to its lipid-rich biomass content and easy cultivation has great potential as a feedstock for biodiesel production [9][10][11].…”

mentioning

confidence: 99%

Lipase immobilized on functionalized superparamagnetic few-layer graphene oxide as an efficient nanobiocatalyst for biodiesel production from Chlorella vulgaris bio-oil

Nematian

Shakeri

Salehi

et al. 2020

Biotechnol Biofuels

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Background: Microalgae, due to its well-recognized advantages have gained renewed interest as potentially good feedstock for biodiesel. Production of fatty acid methyl esters (FAMEs) as a type of biodiesel was carried out from Chlorella vulgaris bio-oil. Biodiesel was produced in the presence of nano-biocatalysts composed of immobilized lipase on functionalized superparamagnetic few-layer graphene oxide via a transesterification reaction. A hybrid of few-layer graphene oxide and Fe 3 O 4 (MGO) was prepared and characterized. The MGO was functionalized with 3-aminopropyl triethoxysilane (MGO-AP) as well as with a couple of AP and glutaraldehyde (MGO-AP-GA). The Rhizopus oryzae lipase (ROL) was immobilized on MGO and MGO-AP using electrostatic interactions as well as on MGO-AP-GA using covalent bonding. The supports, MGO, MGO-AP, and MGO-AP-GA, as well as nano-biocatalyst, ROL/MGO, ROL/ MGO-AP, and ROL/MGO-AP-GA, were characterized using FESEM, VSM, FTIR, and XRD. The few-layer graphene oxide was characterized using AFM and the surface charge of supports was evaluated with the zeta potential technique. The nano-biocatalysts assay was performed with an evaluation of kinetic parameters, loading capacity, relative activity, time-course thermal stability, and storage stability. Biodiesel production was carried out in the presence of nanobiocatalysts and their reusability was evaluated in 5 cycles of transesterification reaction. Results: The AFM analysis confirmed the few-layer structure of graphene oxide and VSM also confirmed that all supports were superparamagnetic. The maximum loading of ROL (70.2%) was related to MGO-AP-GA. The highest biodiesel conversion of 71.19% achieved in the presence of ROL/MGO-AP-GA. Furthermore, this nano-biocatalyst could maintain 58.77% of its catalytic performance after 5 cycles of the transesterification reaction and was the best catalyst in the case of reusability. Conclusions: In this study, the synthesized nano-biocatalyst based on bare and functionalized magnetic graphene oxide was applied and optimized in the process of converting microalgae bio-oil to biodiesel for the first time and compared with bare lipase immobilized on magnetic nanoparticles. Results showed that the loading capacity, kinetic parameters, thermal stability, and storage stability improved by the functionalization of MGO. The biocatalysts, which were prepared via covalent bonding immobilization of enzyme generally, showed better characteristics.

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“…The results showed that the glucose yield obtained was 91% performed by the mechanism of metal-oxides. Meanwhile, Nematian et al [39] reported the use of superparamagnetic nano-biocatalysts for the conversion of bio-oil extraction from Chlorella vulgaris microalgae to biodiesel production. The results showed that the transesterification reaction using 3-aminopropyl triethylenesilane-glutaraldehyde (MNPs-AP-GA) was 69.8 wt %.…”

Section: Nanotechnology For Bioenergy Production From Microalgal Biomassmentioning

confidence: 99%

Nanomaterials Utilization in Biomass for Biofuel and Bioenergy Production

et al. 2020

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The world energy production trumped by the exhaustive utilization of fossil fuels has highlighted the importance of searching for an alternative energy source that exhibits great potential. Ongoing efforts are being implemented to resolve the challenges regarding the preliminary processes before conversion to bioenergy such as pretreatment, enzymatic hydrolysis and cultivation of biomass. Nanotechnology has the ability to overcome the challenges associated with these biomass sources through their distinctive active sites for various reactions and processes. In this review, the potential of nanotechnology incorporated into these biomasses as an aid or addictive to enhance the efficiency of bioenergy generation has been reviewed. The fundamentals of nanomaterials along with their various bioenergy applications were discussed in-depth. Moreover, the optimization and enhancement of bioenergy production from lignocellulose, microalgae and wastewater using nanomaterials are comprehensively evaluated. The distinctive features of these nanomaterials contributing to better performance of biofuels, biodiesel, enzymes and microbial fuel cells are also critically reviewed. Subsequently, future trends and research needs are highlighted based on the current literature.

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Conversion of bio-oil extracted from Chlorella vulgaris micro algae to biodiesel via modified superparamagnetic nano-biocatalyst

Cited by 87 publications

References 55 publications

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

Lipase immobilized on functionalized superparamagnetic few-layer graphene oxide as an efficient nanobiocatalyst for biodiesel production from Chlorella vulgaris bio-oil

Nanomaterials Utilization in Biomass for Biofuel and Bioenergy Production

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Conversion of bio-oil extracted from Chlorella vulgaris micro algae to biodiesel via modified superparamagnetic nano-biocatalyst

Cited by 87 publications

References 55 publications

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4)&nbsp;as a Novel Biosorbent for Methylene Blue Removal

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4)&nbsp;as a Novel Biosorbent for Methylene Blue Removal

Lipase immobilized on functionalized superparamagnetic few-layer graphene oxide as an efficient nanobiocatalyst for biodiesel production from Chlorella vulgaris bio-oil

Nanomaterials Utilization in Biomass for Biofuel and Bioenergy Production

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Product

Resources

About

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal