Efficiencies of Acid and Base-Catalyzed Methylation of Vegetable Oils by Ambient Mass Spectrometry

Júnior, Oscar O. Santos; Montanher, Paula Fernandes; Bonafé, Elton Guntendorfer; Maruyama, Swami Arêa; Carbonera, Fabiana; Alberici, Rosana M.; Eberlin, Marcos N.; Visentainer, Jesuí V.

doi:10.5935/0103-5053.20130221

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The protocol is based on a previous work by Santos Júnior et al [44]. A 5% phenyl fused silica capillary column (10.0 m × 0.32 mm ID × 0.1 m film thickness) was connected to an uncoated, deactivated 5.0 m × 0.53 mm ID fused silica pre-column with a press tight fitting.…”

Section: Quantification Of Biodiesel By Gc Analysismentioning

confidence: 99%

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Caldas

Nunes

Souza

et al. 2016

Applied Catalysis B: Environmental

Self Cite

View full text Add to dashboard Cite

Section: Quantification Of Biodiesel By Gc Analysismentioning

confidence: 99%

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Caldas

Nunes

Souza

et al. 2016

Applied Catalysis B: Environmental

Self Cite

View full text Add to dashboard Cite

“…Interestingly, the TAG prole of the P. caimito seed oil was found to be very similar to that of andiroba oil. 18 Since the andiroba and P. caimito oils are from the Amazonian region and since the andiroba oil has attracted great interest from the cosmetics and pharmaceutical industries, 26 the immediate and effective characterization of the TAG and FFA should be important for their quality control and adulteration if they indeed become similarly explored.…”

Section: Easi(+)-ms Analysismentioning

confidence: 99%

“…Note that the EASI(+)-MS TAG prole of soybean oil also presents major ions of m/z 877 and 901. 18,28,42,43 It can be expected therefore that biodiesel from the H. tiliaceus seed oil should display similar chemical properties as that from soybean oil. This feedstock, which is not a food source, seems to offer a nonedible competitive alternative for biofuel production.…”

Section: Easi(+)-ms Analysismentioning

confidence: 99%

“…Gas (GC-MS) or liquid (LC-MS) chromatography coupled to mass spectrometry 18 have been the main techniques applied to characterize vegetable oils but they require substantial sample preparation and time-consuming separation protocols. MS-only protocols using different ionization techniques have also been applied for the immediate analysis of oils providing comprehensive TAG and FFA proles in a direct and rapid fashion.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Immediate differentiation of unusual seed oils by easy ambient sonic-spray ionization mass spectrometry and chemometric analysis

Santos

Mesquita

et al. 2016

Anal. Methods

Self Cite

View full text Add to dashboard Cite

show abstract

Charred shrimp shells treated with potassium fluoride used as a catalyst for the transesterification of soybean oil with methanol

Biondo

Visentainer

et al. 2015

Journal of Renewable and Sustainable Energy

View full text Add to dashboard Cite

A basic catalyst made of charred shrimp shells treated with potassium fluoride (KF) was employed in the transesterification reaction of soybean oil in the presence of methanol to produce methyl esters. The shells used here are wastes from freshwater shrimp farming in the western region of the state of Paraná, Brazil, which are normally discarded in dumps/landfills and are a rich source of the biopolymer chitin (poly-β-1,4-N-acetyl-D-glucosamine). Charring of the shells (at 450 °C for 2 h) is aimed at partially eliminating rests of proteins and fibers, as well as acetyl groups (-CH3CO), carbon dioxide (-CO2) and water, causing the rearrangement of the chitin structure. The subsequent treatment of the shells with KF (impregnation and activation at 250 °C for 2 h) potentiated the basic sites on the catalyst surface, rendering it active in the transesterification reaction. The catalysts and shrimp shells were characterized by thermal gravimetric analysis, differential thermal analysis, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, N2 physisorption (Braunauer, Emmet and Teller) (BET), and Hammett basicity. An experimental design was created to evaluate the effect of the following variables of the transesterification reaction:temperature, catalyst weight ratio, and molar ratio of oil:alcohol. The results indicate that the treatment with KF increased the basicity of the catalyst. The highest conversion into methyl esters obtained with the experimental design was 86.3%, using an oil:alcohol molar ratio of 1:9, 3.0% (w/w) of catalyst, 85 °C, and 3 h of reaction. Leaching tests indicated that, after 10 h of refluxing in methanol, a conversion rate of 52.4% was achieved using the catalyst leached in optimized conditions. Kinetic studies showed that chemical equilibrium was established after 8 h of reaction, reaching a conversion rate of 96.7%, which reveals the potential of the catalyst to produce methyl esters (biodiesel).

show abstract

Efficiencies of Acid and Base-Catalyzed Methylation of Vegetable Oils by Ambient Mass Spectrometry

Cited by 3 publications

References 0 publications

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Immediate differentiation of unusual seed oils by easy ambient sonic-spray ionization mass spectrometry and chemometric analysis

Charred shrimp shells treated with potassium fluoride used as a catalyst for the transesterification of soybean oil with methanol

Contact Info

Product

Resources

About