Biodiesel from fried vegetable oils via transesterification by heterogeneous catalysis

Viola, Egidio; Blasi, Alessandro; Valerio, V.; Guidi, Ivan; Zimbardi, Francesco; Braccio, Giacobbe; Giordano, G.

doi:10.1016/j.cattod.2011.08.050

Cited by 69 publications

(35 citation statements)

References 28 publications

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“…The reaction time effect studies prove that ultrasonication, in general, can reduce the reaction time and energy consumption. A 93.5% of biodiesel yield was obtained at a reaction time of 0.5 min under pulse conditions which can be compared to the 92% yield obtained during 3 h reaction time using 5 wt.% CaO catalyst under conventional heating and stirring, although this is a heterogeneous catalyst [43]. Our observations were found to be similar to those by Chand et al [41].…”

Section: Effect Of Reaction Timesupporting

confidence: 86%

Continuous and pulse sonication effects on transesterification of used vegetable oil

Martinez‐Guerra

Gude

2015

Energy Conversion and Management

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Section: Effect Of Reaction Timesupporting

confidence: 86%

Continuous and pulse sonication effects on transesterification of used vegetable oil

Martinez‐Guerra

Gude

2015

Energy Conversion and Management

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“…Many authors tested the reusability of commercial calcium oxide or calcium oxide obtained by calcination of natural sources. Viola et al [62] found that the reutilization of the commercial CaO catalyst without regeneration, has showed a loss of efficiency with a reduction of FAME yield equal to 14% for CaO compared to SrO 22%. When Piker et al [37] proposed a regeneration process of Figure 1.…”

Section: Calcium and Magnesium Single Oxidesmentioning

confidence: 99%

Deactivation Processes, Regeneration Conditions and Reusability Performance of CaO or MgO Based Catalysts Used for Biodiesel Production—A Review

Oueda¹,

Bonzi-Coulibaly²,

Ouédraogo³

2017

MSA

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The activity of a catalyst in transestrification reaction usually declines with repeated uses and this limits the possibility to use it many times. This paper presents a review of various techniques used to evaluate the activity changes, the recycling processes for calcium and magnesium oxides based heterogeneous catalysts for biodiesel production. The activity of calcium and magnesium oxides based catalysts declines due to leaching, surface or active sites poisoning by reactant or product molecules and modification of physical aspects. Physico-chemical methods (AAS, BET, CO 2 -TPD, EDS, FTIR, ICP-AES, SEM, TG/DTA and XRD) were used to check the catalyst modification and to confirm the deactivation. When separated from the reaction mixture by filtration, the catalyst could be reused without any treatment or recycled by washing, drying or/and recalcination. Between various recycling processes for calcium and magnesium oxides based catalysts, mixed oxides showed less leaching and performed FAME or FAEE yield >90% with reusability.

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“…The other advantages of biodiesel are that it is nontoxic, biodegradable, suitable for sensitive environments, and can reduce global warming gas emissions (Bhatti et al, 2008;Viola et al, 2012).Today, most biodiesel is produced through the transesterification of triglycerides using alcohol and a catalyst (homogeneous or heterogeneous bases or acids), as in Eq. (1).…”

Section: Introductionmentioning

confidence: 99%

Biodiesel production using alkali earth metal oxides catalysts synthesized by sol-gel method

2014

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Biodiesel fuel is considered as an alternative to diesel fuel. This fuel is produced through transesterification reactions of vegetable oils or animal fat by alcohols in the presence of different catalysts. Recent studies on this process have shown that, basic heterogeneous catalysts have a higher performance than other catalysts. In this study different alkali earth metal oxides (CaO, MgO and BaO) doped SiO2 were used as catalyst for the biodiesel production process. These catalysts were synthesis by using the sol-gel method. A transesterification reaction was studied after 8h by mixing corn oil, methanol (methanol to oil molar ratio of 16:1), and 6 wt. % catalyst (based on oil) at 60 o C and 600rpm. Catalyst loading was studied for different catalysts ranging in amounts from 40, 60 to 80%. The purity and yield of the produced biodiesel for 60% CaO/SiO2 was higher than other catalysts and at 97.3% and 82.1%, respectively. et al. / Biofuel Research Journal 1 (2014) [30][31][32][33] Please cite this article as: Mohadesi, Hojabri and Moradi .Biodiesel production using alkali earth metal oxides catalysts synthesized by sol-gel method. © 2014 BRTeam. All rights reserved. Catalyst synthesis Mohadesi

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Biodiesel from fried vegetable oils via transesterification by heterogeneous catalysis

Cited by 69 publications

References 28 publications

Continuous and pulse sonication effects on transesterification of used vegetable oil

Continuous and pulse sonication effects on transesterification of used vegetable oil

Deactivation Processes, Regeneration Conditions and Reusability Performance of CaO or MgO Based Catalysts Used for Biodiesel Production—A Review

Biodiesel production using alkali earth metal oxides catalysts synthesized by sol-gel method

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