Urea-nitrate combustion synthesis of MgO/MgAl2O4 nanocatalyst used in biodiesel production from sunflower oil: Influence of fuel ratio on catalytic properties and performance

2016 ◽  
Vol 126 ◽  
pp. 362-372 ◽  
Author(s):  
Behgam Rahmani Vahid ◽  
Mohammad Haghighi
Keyword(s):  
Combustion Synthesis ◽  
Sunflower Oil ◽  
Catalytic Properties ◽  
Biodiesel Production ◽  
Fuel Ratio ◽  
Urea Nitrate ◽  
And Performance

scholarly journals Immobilized Biocatalysts of Eversa® Transform 2.0 and Lipase from Thermomyces Lanuginosus: Comparison of Some Properties and Performance in Biodiesel Production

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 738 ◽  
Author(s):  
Javier A. Martínez-Sanchez ◽  
Sara Arana-Peña ◽  
Diego Carballares ◽  
Malcom Yates ◽  
Cristina Otero ◽  
...  
Keyword(s):  
Sunflower Oil ◽  
Specific Activity ◽  
Immobilized Enzymes ◽  
Biodiesel Production ◽  
Thermomyces Lanuginosus ◽  
Tert Butanol ◽  
Agarose Beads ◽  
And Performance

Eversa® Transform (ET), and the lipase from Thermomyces lanuginosus (TLL), liquid commercial lipases formulations, have been immobilized on octyl agarose beads and their stabilities were compared. Immobilized and free ET forms were more thermostable than TLL formulations at pH 5.0, 7.0, and 9.0, and the ET immobilized form was more stable in the presence of 90% methanol or dioxane at 25 °C and pH 7. Specific activity versus p-nitrophenyl butyrate was higher for ET than for TLL. However, after immobilization the differences almost disappeared because TLL was very hyperactivated (2.5-fold) and ET increased the activity only by 1.6 times. The enzymes were also immobilized in octadecyl methacrylate beads. In both cases, the loading was around 20 mg/g. In this instance, activity was similar for immobilized TLL and ET using triacetin, while the activity of immobilized ET was lower using (S)-methyl mandelate. When the immobilized enzymes were used to produce biodiesel from sunflower oil and methanol in tert-butanol medium, their performance was fairly similar.

scholarly journals The effect of the nitrogen source type on the growth and consumption of crude glycerol by Streptomyces hygroscopicus CH-7

2021 ◽  
Vol 10 (1) ◽  
pp. 41-45
Author(s):  
Slavica Ilić ◽  
Jovan Ćirić ◽  
Gordana Gojgić-Cvijović
Keyword(s):  
Amino Acids ◽  
Sunflower Oil ◽  
Crude Glycerol ◽  
Biomass Concentration ◽  
Nitrogen Sources ◽  
Biodiesel Production ◽  
Streptomyces Hygroscopicus ◽  
Basic Medium ◽  
Source Type ◽  
Glycerol Consumption

In this paper we studied the effect of different amino acids (arginine, tryptophan, tyrosine, and phenylalanine) as nitrogen sources on the growth of actinomycete Streptomyces hygroscopicus CH-7 and the consumption of crude glycerol, obtained as a by-product in the biodiesel production from sunflower oil. The highest biomass concentration (9.5 g/L) was achieved using the basic medium and the medium with tryptophan (9.2 g/L), while the crude glycerol consumption was the highest in the basic medium (5.9 mg/mL) and the medium with phenylalanine (3.3 mg/mL).

scholarly journals Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study

2019 ◽  
Vol 73 (6) ◽  
pp. 351-362 ◽  
Author(s):  
Dusica Djokic-Stojanovic ◽  
Zoran Todorovic ◽  
Dragan Troter ◽  
Olivera Stamenkovic ◽  
Ljiljana Veselinovic ◽  
...  
Keyword(s):  
Reaction Temperature ◽  
Sunflower Oil ◽  
Acid Ethyl Ester ◽  
Fatty Acid Ethyl Ester ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Calcium Leaching ◽  
Stirred Reactor ◽  
Optimization Study ◽  
Purification Stage

Triethanolamine was applied as an efficient ?green? cosolvent for biodiesel production by CaO-catalyzed ethanolysis of sunflower oil. The reaction was conducted in a batch stirred reactor and optimized with respect to the reaction temperature (61.6-78.4?C), the ethanol-to-oil molar ratio (7:1-17:1) and the cosolvent loading (3-36 % of the oil weight) by using a rotatable central composite design (RCCD) combined with the response surface methodology (RSM). The optimal reaction conditions were found to be: the ethanol-to-oil molar ratio of 9:1, the reaction temperature of 75?C and the cosolvent loading of 30 % to oil weight, which resulted in the predicted and actual fatty acid ethyl ester (FAEE) contents of 98.8 % and 97.9?1.3 %, respectively, achieved within only 20 min of the reaction. Also, high FAEE contents were obtained with expired sunflower oil, hempseed oil and waste lard. X-ray diffraction analysis (XRD) was used to understand the changes in the CaO phase. The CaO catalyst can be used without any treatment in two consecutive cycles. Due to the calcium leaching into the product, an additional purification stage must be included in the overall process.

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