Catalytic performance of MgO /Fe2O3-SiO2 core-shell magnetic nanocatalyst for biodiesel production of Camelina sativa seed oil: Optimization by RSM-CCD method

The present study was aimed to analyze the physicochemical properties of Camelina sativa L. seed oil in order to identify its utilization as a primary feedstock for biofuel production. Efforts were also made to identify and quantify the amount of α- tocopherols in Camelina seed oil and evaluated in vitro antioxidant potential of Camelina sativa seed oil and were compared with α–tocopherol standard. Physicochemical properties such as oil yield content (36.66 %), less acid value (5.39 mg KOH/g) make it a prominent feedstock for biodiesel production. Saponification value (182.66 mg KOH/g) also makes this oil useful in soap and cosmetic industries. To check in vitro antioxidant potential of Camelina seed oil H2O2, DPPH and ABTS were used as free radical inducers. Oil showed remarkable inhibition potential of trapping these free radicals. Tocopherol content was analyzed through HPTLC. Camelina sativa seed oil was found to contain 59.34 mg/100 g of tocopherol content. It is evident from this study that Camelina oil has high antioxidant potential and there is no need to add other antioxidant substances in the products formed by using Camelina sativa seed oil.

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Magnetic COFs as satisfied support for lipase immobilization and recovery to effectively achieve the production of biodiesel by great maintenance of enzyme activity.

10.21203/rs.3.rs-110352/v1 ◽

2020 ◽

Author(s):

Zi-Wen Zhou ◽

Xiu Xing ◽

Jun Li ◽

Zu-E Hu ◽

Zong-Bo Xie ◽

...

Keyword(s):

Surface Area ◽

High Surface ◽

Enzymatic Catalysis ◽

High Surface Area ◽

Rhizomucor Miehei ◽

Catalytic Performance ◽

Biodiesel Production ◽

Core Shell ◽

Water Medium ◽

Practical Applications

Abstract Background: Production of biodiesel from renewable sources such as non-edible vegetable oils by enzymatic catalysis has been a hotspot but remains a challenge on the efficient use of an enzyme. COFs featuring large surface area and porosity should be applied as an ideal support to impede aggregation of lipase and methanol. However, the naturally low density limits its application. In this work, we reported a facile synthesis of core-shell magnetic COF composite (Fe3O4@COF-OMe) to immobilize RML (Rhizomucor miehei lipase), in order to achieve its utilization in biodiesel production.Result: This strategy gives extrinsic magnetic property, and the magnetic COFs is much heavier and could disperse in water medium well, facilitating the attachment with enzyme. The resultant biocomposite exhibited an excellent capacity of RML due to its high surface area and fast response to the external magnetic field, as well as good chemical stability. The core-shell magnetic COF-OMe structure not only achieved highly efficient immobilization and recovery processes, but also maintained the activity of lipase to a great extent. RML@Fe3O4@COF-OMe performed well in practical applications, while free lipase did not. The biocomposite successfully achieved the production of biodiesel from Jatropha curcas Oil with a yield of about 70% in the optimized conditions. Conclusion: Magnetic COFs (Fe3O4@COF-OMe) for RML immobilization greatly improved catalytic performance in template reaction and biodiesel preparation. The magneticity makes it easily recovered and separated from system. This first successful attempt of COFs-based immobilized enzyme broadened the prospect of biodiesel production by COFs with some inspiration.

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Magnetic COFs as satisfied support for lipase immobilization and recovery to effectively achieve the production of biodiesel by great maintenance of enzyme activity

Biotechnology for Biofuels ◽

10.1186/s13068-021-02001-0 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Zi-Wen Zhou ◽

Chun-Xian Cai ◽

Xiu Xing ◽

Jun Li ◽

Zu-E. Hu ◽

...

Keyword(s):

Surface Area ◽

High Surface ◽

Enzymatic Catalysis ◽

High Surface Area ◽

Rhizomucor Miehei ◽

Catalytic Performance ◽

Biodiesel Production ◽

Core Shell ◽

Water Medium ◽

Practical Applications

Abstract Background Production of biodiesel from renewable sources such as inedible vegetable oils by enzymatic catalysis has been a hotspot but remains a challenge on the efficient use of an enzyme. COFs (Covalent Organic Frameworks) with large surface area and porosity can be applied as ideal support to avoid aggregation of lipase and methanol. However, the naturally low density limits its application. In this work, we reported a facile synthesis of core–shell magnetic COF composite (Fe3O4@COF-OMe) to immobilize RML (Rhizomucor miehei lipase), to achieve its utilization in biodiesel production. Result This strategy gives extrinsic magnetic property, and the magnetic COFs is much heavier and could disperse in water medium well, facilitating the attachment with the enzyme. The resultant biocomposite exhibited an excellent capacity of RML due to its high surface area and fast response to the external magnetic field, as well as good chemical stability. The core–shell magnetic COF-OMe structure not only achieved highly efficient immobilization and recovery processes but also maintained the activity of lipase to a great extent. RML@Fe3O4@COF-OMe performed well in practical applications, while free lipase did not. The biocomposite successfully achieved the production of biodiesel from Jatropha curcas Oil with a yield of about 70% in the optimized conditions. Conclusion Magnetic COFs (Fe3O4@COF-OMe) for RML immobilization greatly improved catalytic performance in template reaction and biodiesel preparation. The magneticity makes it easily recovered and separated from the system. This first successful attempt of COFs-based immobilized enzyme broadened the prospect of biodiesel production by COFs with some inspiration.

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Magnetic COFs as Satisfied Support for Lipase Immobilization and Recovery to Effectively Achieve the Production of Biodiesel by Great Maintenance of Enzyme Activity

10.21203/rs.3.rs-110352/v2 ◽

2021 ◽

Author(s):

Zi-Wen Zhou ◽

Chun-Xian Cai ◽

Xiu Xing ◽

Jun Li ◽

Zu-E Hu ◽

...

Keyword(s):

Surface Area ◽

High Surface ◽

Enzymatic Catalysis ◽

High Surface Area ◽

Rhizomucor Miehei ◽

Catalytic Performance ◽

Biodiesel Production ◽

Core Shell ◽

Water Medium ◽

Practical Applications

Abstract Background: Production of biodiesel from renewable sources such as inedible vegetable oils by enzymatic catalysis has been a hotspot but remains a challenge on the efficient use of an enzyme. COFs (Covalent Organic Frameworks) with large surface area and porosity can be applied as ideal support to avoid aggregation of lipase and methanol. However, the naturally low density limits its application. In this work, we reported a facile synthesis of core-shell magnetic COF composite (Fe3O4@COF-OMe) to immobilize RML (Rhizomucor miehei lipase), to achieve its utilization in biodiesel production.Result: This strategy gives extrinsic magnetic property, and the magnetic COFs is much heavier and could disperse in water medium well, facilitating the attachment with the enzyme. The resultant biocomposite exhibited an excellent capacity of RML due to its high surface area and fast response to the external magnetic field, as well as good chemical stability. The core-shell magnetic COF-OMe structure not only achieved highly efficient immobilization and recovery processes but also maintained the activity of lipase to a great extent. RML@Fe3O4@COF-OMe performed well in practical applications, while free lipase did not. The biocomposite successfully achieved the production of biodiesel from Jatropha curcas Oil with a yield of about 70% in the optimized conditions. Conclusion: Magnetic COFs (Fe3O4@COF-OMe) for RML immobilization greatly improved catalytic performance in template reaction and biodiesel preparation. The magneticity makes it easily recovered and separated from the system. This first successful attempt of COFs-based immobilized enzyme broadened the prospect of biodiesel production by COFs with some inspiration.

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Mango (Magnifera indica) seed oil grown in Dilla town as potential raw material for biodiesel production using NaOH- a homogeneous catalyst

10.31221/osf.io/xsq5y ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Diesel Engine ◽

Physicochemical Properties ◽

Seed Oil ◽

Methyl Esters ◽

Pollution Prevention ◽

Raw Material ◽

Biodiesel Production ◽

Molar Ratio ◽

Homogeneous Catalyst ◽

Minimal Amount

Biodiesel produced by transesterification process from vegetable oils or animal fats is viewed as a promising renewable energy source. Now a day’s diminishing of petroleum reserves in the ground and increasing environmental pollution prevention and regulations have made searching for renewable oxygenated energy sources from biomasses. Biodiesel is non-toxic, renewable, biodegradable, environmentally benign, energy efficient and diesel substituent fuel used in diesel engine which contributes minimal amount of global warming gases such as CO, CO2, SO2, NOX, unburned hydrocarbons, and particulate matters. The chemical composition of the biodiesel was examined by help of GC-MS and five fatty acid methyl esters such as methyl palmitate, methyl stearate, methyl oleate, methyl linoleate and methyl linoleneate were identified. The variables that affect the amount of biodiesel such as methanol/oil molar ratio, mass weight of catalyst and temperature were studied. In addition to this the physicochemical properties of the biodiesel such as (density, kinematic viscosity, iodine value high heating value, flash point, acidic value, saponification value, carbon residue, peroxide value and ester content) were determined and its corresponding values were 87 Kg/m3, 5.63 Mm2/s, 39.56 g I/100g oil, 42.22 MJ/Kg, 132oC, 0.12 mgKOH/g, 209.72 mgKOH/g, 0.04%wt, 12.63 meq/kg, and 92.67 wt% respectively. The results of the present study showed that all physicochemical properties lie within the ASTM and EN biodiesel standards. Therefore, mango seed oil methyl ester could be used as an alternative to diesel engine.

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Efficient Production of Biodiesel Catalyzed by Acidic Nanoporous Carbon Materials：A Review

Current Nanoscience ◽

10.2174/1573413716666200319131508 ◽

2020 ◽

Vol 16 ◽

Author(s):

Anping Wang ◽

Heng Zhang ◽

Hu Li ◽

Song Yang

Keyword(s):

Pore Structure ◽

Active Sites ◽

Catalytic Performance ◽

Nanoporous Carbon ◽

Biodiesel Production ◽

Efficient Production ◽

Fossil Energy ◽

Catalytic Materials ◽

High Acid ◽

Carbon Based

Background: With the gradual decrease of fossil energy, the development of alternatives to fossil energy has attracted more and more attention. Biodiesel is considered to be the most potent alternative to fossil energy, mainly due to its green, renewable and biodegradable advantages. The stable, efficient and reusable catalysts are undoubtedly the most critical in the preparation of biodiesel. Among them, nanoporous carbon-based acidic materials are very important biodiesel catalysts. Objective: The latest advances of acidic nanoporous carbon catalysts in biodiesel production was reviewed. Methods: Biodiesel is mainly synthesized by esterification and transesterification. Due to the important role of nanoporous carbon-based acidic materials in the catalytic preparation of biodiesel, we focused on the synthesis, physical and chemical properties, catalytic performance and reusability. Results: Acidic catalytic materials have a good catalytic performance for high acid value feedstocks. However, the preparation of biodiesel with acid catalyst requires relatively strict reaction conditions. The application of nanoporous acidic carbon-based materials, due to the support of carbon-based framework, makes the catalyst have good stability and unique pore structure, accelerates the reaction mass transfer speed and accelerates the reaction. Conclusion: Nanoporous carbon-based acidic catalysts have the advantages of suitable pore structure, high active sites, and high stability. In order to make these catalytic processes more efficient, environmentally friendly and low cost, it is an important research direction for the future biodiesel catalysts to develop new catalytic materials with high specific surface area, suitable pore size, high acid density, and excellent performance.

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Superior co-catalysis by bimetallic nanostructure for TiO2 photocatalysis

Journal of Photocatalysis ◽

10.2174/2665976x01999201022194257 ◽

2020 ◽

Vol 01 ◽

Author(s):

Bonamali Pal ◽

Anila Monga ◽

Aadil Bathla

Keyword(s):

Visible Light ◽

Catalytic Performance ◽

Transition Metal Catalysts ◽

Core Shell ◽

Structural Morphology ◽

Tio2 Photocatalysis ◽

Co Catalysts ◽

Bimetallic Nanocomposites ◽

Bimetallic Nanostructure ◽

Bimetallic Nanostructures

Background:: Bimetallic nanocomposites have currently gained significant importance for enhanced catalytic applications relative to monometallic analogues. The synergistic interactions modified electronic and optical properties in the bimetallic (M1@M2) structural morphology e.g., core-shell /alloy nanostructures resulted in a better co-catalytic performance for TiO2 photocatalysis. Objective:: Hence, this article discusses the preparation, characterization, and co-catalytic activity of different bimetallic nanostructures namely, Cu@Zn, Pd@Au, Au@Ag, and Ag@Cu, etc. Method:: These bimetallic co-catalysts deposited on TiO2 possess the ability to absorb visible light due to surface plasmonic absorption and are also expected to display the new properties due to synergy between two distinct metals. As a result, they reveal the highest level of activity than the monometal deposited TiO2. Result:: Their optical absorption, emission, charge carrier dynamics, and surface structural morphology are explained for the improved photocatalytic activity of M1@M2 loaded TiO2 for the hydrogenation of certain organic compounds e.g., quinoline, crotonaldehyde, and 1,3-dinitrobenzene, etc. under UV/ visible light irradiation. Conclusion:: It revealed that the use of bimetallic core@shell co-catalyst for hydrogenation of important industrial organics by M1@M2-TiO2 nanocomposite demonstrates beneficial reactivity in many instances relative to conventional transition metal catalysts.

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