Methyl Oleate Production in a Supported Sol–Gel Immobilized Lipase Packed Bed Reactor

An optimal continuous production of biodiesel by methanolysis of soybean oil in a packed-bed reactor was developed using immobilized lipase (Novozym 435) as a catalyst in atert-butanol solvent system. Response surface methodology (RSM) and Box-Behnken design were employed to evaluate the effects of reaction temperature, flow rate, and substrate molar ratio on the molar conversion of biodiesel. The results showed that flow rate and temperature have significant effects on the percentage of molar conversion. On the basis of ridge max analysis, the optimum conditions were as follows: flow rate 0.1 mL/min, temperature52.1∘C, and substrate molar ratio 1 : 4. The predicted and experimental values of molar conversion were83.31±2.07% and82.81±.98%, respectively. Furthermore, the continuous process over 30 days showed no appreciable decrease in the molar conversion. The paper demonstrates the applicability of using immobilized lipase and a packed-bed reactor for continuous biodiesel synthesis.

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Synthesis and Characterization of TiO2/SiO2 Monoliths as Photocatalysts on Methanol Oxidation

International Journal of Photoenergy ◽

10.1155/2018/8478240 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Rigoberto Regalado-Raya ◽

Rubí Romero-Romero ◽

Osmín Avilés-García ◽

Jaime Espino-Valencia

Keyword(s):

Thin Film ◽

Methanol Oxidation ◽

Immersion Time ◽

Film Formation ◽

Anatase Phase ◽

Sol Gel ◽

Packed Bed ◽

Dip Coating ◽

Packed Bed Reactor ◽

Titanium Butoxide

Photocatalytic materials based on silica-titania (SiO2-TiO2) were synthesized by sol-gel and dip-coating method. TEOS and titanium butoxide were used as precursors of the silica-titania, respectively. A thin film with anatase phase was obtained on the surface of the support. The effect of variables as dispersion mechanism, immersion time, and number of treatment cycles were studied. The materials were characterized using X-ray diffraction, scanning electron microscopy, energy dispersion scanning, and N2 adsorption-desorption. The highest crystallinity of TiO2 on silica, high specific surface area in TiO2-SiO2 materials, and thin film formation were obtained by using a stirring plate and minimum immersion time. The so synthesized catalyst allowed the production of formaldehyde from the photocatalyzed methanol oxidation in a packed-bed reactor.

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Rapid solvent-free esterification of conjugated linoleic acid and glycerol in a packed bed reactor containing an immobilized lipase

Studies in Surface Science and Catalysis - 12th International Congress on Catalysis, Proceedings of the 12th ICC ◽

10.1016/s0167-2991(00)80549-2 ◽

2000 ◽

pp. 3405-3410 ◽

Cited By ~ 1

Author(s):

Jose A. Arcos ◽

Charles G. Hill

Keyword(s):

Linoleic Acid ◽

Conjugated Linoleic Acid ◽

Immobilized Lipase ◽

Packed Bed ◽

Solvent Free ◽

Packed Bed Reactor

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Thermochemical water-splitting for H2 generation using sol-gel derived Mn-ferrite in a packed bed reactor

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2011.03.010 ◽

2012 ◽

Vol 37 (3) ◽

pp. 2924-2934 ◽

Cited By ~ 69

Author(s):

Rahul R. Bhosale ◽

Rajesh V. Shende ◽

Jan A. Puszynski

Keyword(s):

Water Splitting ◽

Sol Gel ◽

Packed Bed ◽

Packed Bed Reactor ◽

H2 Generation

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Photocatalytic Active Coatings for Lignin Degradation in a Continuous Packed Bed Reactor

International Journal of Photoenergy ◽

10.1155/2014/502326 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 6

Author(s):

Colin Awungacha Lekelefac ◽

Johannes Hild ◽

Peter Czermak ◽

Michael Herrenbauer

Keyword(s):

Photocatalytic Degradation ◽

Solid Phase ◽

Sol Gel ◽

Packed Bed ◽

Reaction Rates ◽

Packed Bed Reactor ◽

Dissolved Carbon ◽

Degradation Rates ◽

Vis Spectroscopy ◽

Lignin Sulfonate

The synthesis of immobilized catalyst on porous glass support material via the sol-gel route is reported. TiO2-P25-SiO2+ Pt, TiO2-P25-SiO2, TiOSO4_30.6 wt%, and ZnO + TiO2-P25-SiO2catalysts were synthesized and a comparative study is done regarding morphology of coatings, degradation rates, reaction rates, dissolved carbon (DC), formation of peaks, and fluorescence of products formed from the photocatalytic degradation of lignin sulfonate obtained from a local paper plant. Through simultaneous reaction-extraction pathways applying dialysis filtration and highly porous polystyrene divinylbenzene adsorbent resin (HR-P) for solid phase extraction (SPE), an attempt has been made to isolate smaller molecules produced from photocatalytic degradation. Moreover relatively high lignin sulfonate (0.5 g/L) concentrations are used in the reactions. UV-Vis spectroscopy revealed a faster reduction in the concentration values for the aliphatic moiety compared to the aromatic moiety. Peaks were observed by both fluorescence spectroscopy and HPLC suggesting the production of new substances and fluorophores.

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