Effect of methanol content on enzymatic production of biodiesel from waste frying oil

Maceiras, R.; Vega, M.; Costa, Clauber Henrique Souza da; Ramos, P.; Márquez, M. Carmen

doi:10.1016/j.fuel.2009.05.007

Cited by 85 publications

(45 citation statements)

References 28 publications

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“…With the decrease of petroleum reserves and the increase of environment protection consciousness, bio-diesel, as a renewable energy source, has been considered to be a significant alternative to petroleum based diesel fuel over recent years [119,120]. Bio-diesel produced through hydrolysis-esterification reactions has attracted great interest [121][122][123].…”

Section: Biomass Related Catalytic Reactionsmentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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Zinc oxide (ZnO), with the unique chemical and physical properties of high chemical stability, broad radiation absorption range, high electrochemical coupling coefficient, and high photo-stability, is an attractive multifunctional material which has promoted great interest in many fields. What is more, its properties can be tuned by controllable synthesized morphologies. Therefore, after the success of the abundant morphology controllable synthesis, both the morphology-dependent ZnO properties and their related applications have been extensively investigated. This review concentrates on the properties of morphology-dependent ZnO and their applications in catalysis, mainly involved reactions on green energy and environmental issues, such as CO 2 hydrogenation to fuels, methanol steam reforming to generate H 2 , bio-diesel production, pollutant photo-degradation, etc. The impressive catalytic properties of ZnO are associated with morphology tuned specific microstructures, defects or abilities of electron transportation, etc. The main morphology-dependent promotion mechanisms are discussed and summarized.

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Section: Biomass Related Catalytic Reactionsmentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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“…A more recent study by Maceiras et al (2009) was also conducted to investigate the enzymatic conversion of waste cooking oils into biodiesel using immobilized lipase Novozym 435 as catalyst. The effects of methanol to oil molar ratio, dosage of enzyme and reaction time were investigated.…”

Section: Enzymatic Transesterificationmentioning

confidence: 99%

“…At the 6:1 methanol-oil molar ratio, the addition of 1.25 volume of tetrahydrofuran per volume of methanol produces an oil dominant one phase system in which methanolysis speeds up dramatically to 5-10 min, at ambient temperatures, atmospheric pressure and without agitation. No catalyst residues in either the ester or the glycerol phase (Meher et al, Reaction conditions: first-step: WFO 2 g; 10 wt % immobilized C. antarctica; reaction temperature 50 o C; reaction time 4 h. Second step was conducted under the same conditions after 10% of fresh enzyme was added in the reaction mixture (Maceiras et al, 2009) Relative activity (%) Fig. 12: Operational stability of immobilized PEL.…”

Section: Non-catalytic Transesterificationmentioning

confidence: 99%

Different techniques for the production of biodiesel from waste vegetable oil

Refaat

2009

Int. J. Environ. Sci. Technol.

283

118

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ABSTRACT:The production of biodiesel from waste vegetable oil offers a triple-facet solution: economic, environmental and waste management. The new process technologies developed during the last years made it possible to produce biodiesel from recycled frying oils comparable in quality to that of virgin vegetable oil biodiesel with an added attractive advantage of being lower in price. Thus, biodiesel produced from recycled frying oils has the same possibilities to be utilized. While transesterification is well-established and becoming increasingly important, there remains considerable inefficiencies in existing transesterification processes. There is an imperative need to improve the existing biodiesel production methods from both economic and environmental viewpoints and to investigate alternative and innovative production processes. This study highlights the main changes occurring in the oil during frying in order to identify the characteristics of oil after frying and the anticipated effects of the products formed in the frying process on biodiesel quality and attempts to review the different techniques used in the production of biodiesel from recycled oils, stressing the advantages and limitations of each technique and the optimization conditions for each process. The emerging technologies which can be utilized in this field are also investigated. The quality of biodiesel produced from waste vegetable oil in previous studies is also reviewed and the performance of engines fueled with this biodiesel and the characteristics of the exhaust emissions resulting from it are highlighted. The overarching goal is to stimulate further activities in the field.

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“…Aside from the environmental issues related to the extraction and refining of the crude oil to get the diesel fuel, the diminishing of the petroleum reserves urges the researchers to find new renewable and sustainable sources for the diesel [1]. Over the last years biodiesel has become new energy source that have great importance [2].…”

Section: Introductionmentioning

confidence: 99%

Nano-Magnetic Catalyst CaO-Fe3O4 for Biodiesel Production from Date Palm Seed Oil

Ali

Disher

Al-Hattab

2017

Bull. Chem. React. Eng. Catal.

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A nanocatalyst of CaO supported by Fe3O4 magnetic particles was prepared by a chemical precipitation method. It was characterized by various techniques including X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy (SEM); Fourier transforms infrared spectroscopy (FTIR), and Hammett indicator. It has been found that the catalyst consists of CaO and Fe3O4 accompanied by CaFe2O4. This composite catalyst was used for the catalytic transesterification of palm seed oil. The results revealed that the highest biodiesel yields for palm seed oil of 69.7% can be obtained under the conditions of (65 °C reaction temperature, 300 min reaction time, 20 methanol/oil molar ratio, and 10 wt.% of CaO/Fe3O4 catalyst loading). The physicochemical properties of the biodiesel produced from palm seed oil were further studied and compared with the ASTM and the EN biodiesel specifications. The results showed that the properties of the biodiesel produced comply with the international standard specifications.

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Effect of methanol content on enzymatic production of biodiesel from waste frying oil

Cited by 85 publications

References 28 publications

The Applications of Morphology Controlled ZnO in Catalysis

The Applications of Morphology Controlled ZnO in Catalysis

Different techniques for the production of biodiesel from waste vegetable oil

Nano-Magnetic Catalyst CaO-Fe3O4 for Biodiesel Production from Date Palm Seed Oil

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