Characterization of biodiesel from frying oil obtained by hydro-esterification using vermiculite as heterogeneous catalyst

Lacerda, José Gorete Pedroza de.; Candeia, Roberlucia Araújo; Sales, Luciano Leal de Morais; Cunha, Antônio Fernando Portela da; Wanderley, Albaneide F.; Campos, Adriana

doi:10.1007/s10973-019-08092-0

Cited by 6 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Between 1500 and 900 cm −1 , this region is known as “fingerprint” of spectra because there is a difference in terms of chemistry structure of oils and methyl esters obtained from oils or the region discriminates biodiesel from its source (oils). However, in this region, it was also observed that similar bands such as band around 1464 cm −1 , associated with asymmetrical stretching vibration (CH groups in CH 2 ) and absorption band at 1380 cm −1 , associated with symmetric stretching vibration of group CH 2 (methylene group) 77,78 . The absorption bands between 1300 and 800 cm −1 , in particular band around 1241 cm −1 represents bending vibrations of CH groups in CH 3 , and bands around 1164 and 1101 cm −1 , exhibited the vibration of CO group in esters 79,80 .…”

Section: Resultsmentioning

confidence: 81%

See 1 more Smart Citation

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

et al. 2021

View full text Add to dashboard Cite

Summary Different types of waste oils (soybean, sunflower, corn, and cottonseed) were evaluated in simultaneous esterification and transesterification reactions for more sustainable production of biodiesel by heterogeneous magnetic catalysis. The Ni0.5Zn0.5Fe2O4 magnetic nanoparticles (MNPs) were synthesized by combustion reaction on a pilot‐scale of 200 g/batch, showing obvious conditions for possible scalability for large scale production. The properties of the MNPs were investigated by X‐ray diffraction, Rietveld refinement, UV‐Vis, Brunauer, Emmett, and Teller/Barrett, Joyner, and Halenda method, granulometric distribution, pH, zeta potential, and NH3‐TPD. The results confirmed the formation of the majority phase of the inverse NiZn spinel, with median particle of 39.6 nm, and surface area of 64 m2/g with acid character. The quality measures provide the adequacy of the biodiesel obtained and the gas chromatography showed conversions from 86.65% to 98.12%. Finally, the MNPs were successfully recovered and reused in three more cycles without activity loss, and with capacity for new recycles due to its high reactivity and stability.

show abstract

Section: Resultsmentioning

confidence: 81%

“…The absorption bands found at 2926 and 2857 cm −1 correspond to the CH asymmetric stretching vibration and CH symmetric stretching vibration in CH 2 and CH 3 groups 76 . In addition, the absorption bands at 1743 cm −1 are associated to stretching of carbonyl group (CO) of esters in triglycerides and in FAMEs 77,78 …”

Section: Resultsmentioning

confidence: 98%

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The results in Figure 4 and Table 2 present their estimated compositions according to observed mass losses. Each thermogram was divided into the observed three stages of thermal degradation corresponding of free fatty acids in stage I, some middle components in stage II, which have been designated as mono- and diglycerides based on data from the literature, 31 and triglycerides in stage III. In addition, the thermograms could account for over 99 wt % of the three samples.…”

Section: Results and Discussionmentioning

confidence: 99%

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

et al. 2022

View full text Add to dashboard Cite

In this present work, the hydrolysis of a sample of rapeseed oil (RSO) and two waste cooking oil (WCO) samples in subcritical water has been carried out in a stirred batch stainlesssteel reactor to produce fatty acids. Using RSO as a model triglyceride, the effects of reaction parameters on the yields of fatty acids were investigated to determine the optimum set of hydrolysis conditions to be a temperature of 300 °C, a reaction time of 60 min, and a vegetable oil−water mass ratio of 1:2. The set of optimum conditions was applied to the hydrolysis of the WCOs. Oleic acid was the dominant fatty acid with yields of 74.4 wt % from RSO and 57.5 and 72.4 wt % from the two WCOs, respectively, while palmitic acid was the second most abundant fatty acid with yields of up to 31 wt %. The feedstocks and fatty acid products were characterized by acid−base titration and thermogravimetric analysis (TGA). Thereafter, the hydrolysis products from the optimum conditions were esterified to their fatty acid methyl esters (FAMEs), which were further characterized by gas chromatography−mass spectrometry (GC/MS) and TGA. With RSO at the optimum hydrolysis conditions, acid−base titration gave a fatty acid yield of 97.2 wt %, while TGA gave 86 wt %. Under the same conditions, the yield of FAMEs from GC/MS analysis was 88.6 wt %, while TGA gave a FAMEs' yield of 91 wt %. This study showed that the simple TGA method provided detailed and complete characterization of lipid feedstocks and their conversion products. In addition, subcritical water hydrolysis can be used to valorize WCOs to fatty acids, with little or no extensive feedstock purification, for various applications including biodiesel production.

show abstract

SolidWorks visualization of 3D fracture geometry in tight oil reservoirs

Liu

Shi

Sun

et al. 2019

J Therm Anal Calorim

View full text Add to dashboard Cite

Characterization of biodiesel from frying oil obtained by hydro-esterification using vermiculite as heterogeneous catalyst

Cited by 6 publications

References 24 publications

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

SolidWorks visualization of 3D fracture geometry in tight oil reservoirs

Contact Info

Product

Resources

About