The effect of agitation intensity on alkali-catalyzed methanolysis of sunflower oil

Stamenković, Olivera S.; Lazić, Miodrag L.; Todorović, Zoran B.; Veljković, Vlada B.; Skala, Dejan

doi:10.1016/j.biortech.2006.09.024

Cited by 141 publications

(67 citation statements)

References 29 publications

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“…Furthermore, the kinetic study of solid catalysts is still very scarce. Only a few researchers have examined the kinetics of transesterification catalyzed by solid catalysts [20][21][22] and all of them only investigated the kinetics of single promoted catalysts. The kinetics data are crucial for designing the industrial operation and optimization of the process.…”

Section: B Introductionmentioning

confidence: 99%

Kinetics of Palm Oil Transesterification Using Double Promoted Catalyst CaO/KI/ γ - Al 2 O 3

Asri¹,

Budikarjono²,

Suprapto³

et al. 2015

J. Eng. Technol. Sci.

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Abstract. Double promoted catalyst (CaO/KI/γ-Al 2 O 3 ) was used as the catalyst for transesterification of palm oil into biodiesel. The experiment was carried out in a batch reactor consisting of a three-neck glass flask (500 ml capacity) equipped with a reflux condenser, thermometer and magnetic stirrer. Kinetic study was carried out with methanol under reflux conditions at different temperatures (35-75°C) and different times of reaction (1-7 hours). The effects of temperature and time of the reaction on the conversion of palm oil into biodiesel and reaction rate constants were investigated. The results showed that the conversion and rate constants of reaction increased with the increasing of the reaction temperature. The highest conversion of 97% was obtained at 65°C and 5 hours of reaction time. Meanwhile, the activation energy and the frequency factor were 15.47 kJ/mol and 1.22.10 2 , respectively.

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Section: B Introductionmentioning

confidence: 99%

Kinetics of Palm Oil Transesterification Using Double Promoted Catalyst CaO/KI/ γ - Al 2 O 3

Asri¹,

Budikarjono²,

Suprapto³

et al. 2015

J. Eng. Technol. Sci.

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“…Biofuel can be derived from these commodity crops, such as soybean [4], rapeseed oil [5], palm oil, sunflower [6], jathropa [7][8], even from coffee [9]. However, CPO-based biodiesel is the strongest candidates to be developed, because this commodity has a relatively low production cost and has equal performance compared with diesel fuel properties, therefore engine modification is relatively minimum [7,10].…”

Section: Introductionmentioning

confidence: 99%

Cradle to Gate Simple Life Cycle Assessment of Biodiesel Production in Indonesia

Hidayatno¹,

Zagloel²,

Purwanto³

et al. 2011

MST

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The focus of this research is to analyze potential environmental impact in the supply chain of palm oil biodiesel industries. Simple Life Cycle Assessment (LCA) is applied to analyze impacts, produced by the three main units in the supply chain of Palm-Oil-based Biodiesel, which are Palm Plantation, CPO mill, and Biodiesel Plant. We developed LCA calculation model using spreadsheet software, used to assess a number of input scenarios to evaluate the best scenario, in variation of: land quality, land area and the rate of clearing, land clearing technique and type of the original land. The biggest potential environmental impact is the contribution to global warming impact which emissions are produced mostly from unit plantation. Although plantation has biggest potential to contribute to environmental impact, it also gives biggest reduction to global warming impact. In general, the biggest environmental impact in the LCA category is climate change, followed by photo-oxidant formation and eutrophication. The biggest impacts in the supply chain are from the plantation, especially when choosing the right technique for land clearing. In addition, due to LCA linearity nature, the scenario that we tested does not change the total accumulative environmental impacts.

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“…Investigations into the transesterification reaction have shown that it transitions from a biphasic liquid mixture (oil and methanol) to another biphasic mixture (FAME and glycerol) via a pseudo-single phase emulsion (Noureddini and Zhu, 1997;Stamenkovic et al, 2007;Stamenkovic et al, 2008). Throughout the reaction a continuous non-polar phase (Oil, FAME and reaction intermediates) and a dispersed polar phase (methanol, glycerol and catalyst) are present with the composition of the phases constantly changing.…”

mentioning

confidence: 99%

“…During the first stage it is most likely that the rate of mass transfer between the Page 6 of 49 A c c e p t e d M a n u s c r i p t 6 phases is slower than the rate of chemical reaction, thus mass transfer is the rate limiting factor (Noureddini and Zhu, 1997;Stamenkovic et al, 2007).…”

mentioning

confidence: 99%

“…The reaction medium during this stage has been described by some as a pseudo single phase emulsion (Ma et al, 1999;Zhou and Boocock, 2006) . Different authors have attributed the self-enhanced mass transfer rate to the surfactant action of the reaction intermediates (Boocock et al, 1998;Stamenkovic et al, 2007), while others have attributed it to the solvent properties of FAME (Noureddini and Zhu, 1997).…”

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confidence: 99%

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Development and validation of a two phase CFD model for tubular biodiesel reactors

Boer

Bahri

2015

Computers & Chemical Engineering

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The use of biodiesel as an alternative to diesel has gained increasing momentum over the past 15 years. To meet this growing demand there is a need to optimise the transesterification reactor at the heart of the biodiesel production system. Assessing the performance of innovative reactors is difficult due to the liquid-liquid reaction mixture that is affected by mass transfer, reaction kinetics and component solubility. This paper presents a Computational Fluid Dynamic model of a tubular reactor developed in ANSYS CFX that can be used to predict the onset of mixing via turbulent flow. In developing the model an analysis of the reaction mixture is provided before the presentation of experimental data, which includes flow visualisation results and temperature dependant viscosity and density data for each phase. The detailed data and model development procedure represents an advancement in the modeling of the two phase transesterification reaction used in biodiesel production..

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The effect of agitation intensity on alkali-catalyzed methanolysis of sunflower oil

Cited by 141 publications

References 29 publications

Kinetics of Palm Oil Transesterification Using Double Promoted Catalyst CaO/KI/ γ - Al 2 O 3

Kinetics of Palm Oil Transesterification Using Double Promoted Catalyst CaO/KI/ γ - Al 2 O 3

Cradle to Gate Simple Life Cycle Assessment of Biodiesel Production in Indonesia

Development and validation of a two phase CFD model for tubular biodiesel reactors

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