A review of laboratory-scale research on lipid conversion to biodiesel with supercritical methanol (2001–2009)

Sawangkeaw, Ruengwit; Bunyakiat, Kunchana; Ngamprasertsith, Somkiat

doi:10.1016/j.supflu.2010.06.008

Cited by 119 publications

(83 citation statements)

References 72 publications

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“…This process does not require any catalysts or auxiliary chemicals and does not generate significant wastes [10], [15]. Supercritical methanol was used to obtain biodiesel from different oils such as rapeseed, sunflower, soybean and palm kernel [15], [17]- [19].…”

Section: Biodiesel Production From Castor Oil Under Subcritical Methamentioning

confidence: 99%

“…The use of supercritical methanol conditions was suggested to avoid the use of catalyst for the reaction of transesterification, because one of the main stages of biodiesel production is its washing [10]. However this technology shows some limitations such us the high energy consumption and the huge cost of the equipments that have to work at high temperature and pressure [22].…”

Section: Effect Of Catalyst Concentration On Biodiesel Productionmentioning

confidence: 99%

“…In this process, a large volume of waste water and some saponified components that need to be treated before discharging to the environment or recycling to the process are produced. Moreover, chemicals that are used as catalyst and neutralizers are difficult to recover and the washing step that removes the saponified components in the crude biodiesel is the longest of these steps, since the saponified components interfere with a retard phase separation [10].…”

Section: Introductionmentioning

confidence: 99%

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Biodiesel Production from Castor Oil under Subcritical Methanol Conditions

Sánchez‍¹,

Martín²,

Martínez³

et al. 2015

IJESD

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Abstract-Biodiesel is a potentially sustainably renewable fuel for diesel engines; transesterification is the most used method to produce it and high quality vegetable oils are the most usual raw material. Non-edible vegetable oils such as castor oil can provide an alternative feedstock. In this work biodiesel was obtained by transesterification of castor oil with subcritical methanol; the reaction was carried out in an hermetic reactor at temperatures higher than methanol boiling point and with a small amount of potassium methoxide as catalyst. The effect of methanol:oil molar ratios were analyzed, observing that high proportion of alcohol is needed to reach high ester content, the best results were reached with 24:1 MeOH:oil molar ratio. Regarding catalyst concentration, 8.7 mM (0.12 wt%) were enough to achieve good results. A temperature of 150 º C and 1 h of reaction, at 10 bar, were the mildest conditions to reach an ester content higher than 90 wt %. The highest ester content, 94.7 wt %, was achieved at 220 º C, 36 bar and 4 h of reaction time. Hence good quality biodiesel from castor oil can be produced in subcritical methanol conditions, using a small amount of basic catalyst.

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Section: Biodiesel Production From Castor Oil Under Subcritical Methamentioning

confidence: 99%

Section: Effect Of Catalyst Concentration On Biodiesel Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biodiesel Production from Castor Oil under Subcritical Methanol Conditions

Sánchez‍¹,

Martín²,

Martínez³

et al. 2015

IJESD

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“…For extended details, the review articles on supercritical transesterification with methanol (de Boer & Bahri, 2011;Sawangkeaw et al, 2010), or ethanol (Balat, 2008;Pinnarat & Savage, 2008) and other supercritical technologies (Lee & Saka, 2010;Tan & Lee, 2011) are also available elsewhere. Even though the knowledgebase of this process has been growing the past decade, more work is still required for an adequate understanding of the process.…”

Section: Resultsmentioning

confidence: 99%

“…However, the first-order kinetic model is only suitable for a high alcohol to oil molar ratio, due to the insignificant changes in the alcohol concentration, but this increasingly becomes untrue as the alcohol to oil molar ratio decreases. For the first-order model, the rate constants for each vegetable oil have a different temperature sensitivity, as noticed by the slope of Arrhenius' plot (Sawangkeaw et al, 2010). For example, the rate constants of rapeseed and soybean oil depend more strongly on the temperature than that for sunflower, palm and groundnut oils.…”

Section: The Chemical Kinetics and Phase Behavior In Supercritical Trmentioning

confidence: 99%

Transesterification in Supercritical Conditions

Ngamprasertsith¹,

Sawangkeaw²

2011

Biodiesel - Feedstocks and Processing Technologies

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Biomass for Polygeneration and District Heating

Baratieri

Prando

2015

Handbook of Clean Energy Systems

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This article deals with biomass‐based technologies for polygeneration and district heating ( DH ). The relevant technologies for the generation of heat, power, and biofuels are presented in Section 1 taking into account thermochemical, chemical, and biological pathways. In particular, the opportunity of integrating them for polygeneration—also according to the biorefinery concept—is analyzed here. Biomass combined heat and power ( CHP ) systems for DH application have been compared considering size, efficiency, flexibility of operation, and field experience. In Section 2, heat distribution systems have been described taking advantage of the previous analysis on generation technologies and pointing out the existing relation between distribution, generation efficiencies, and DH network temperature. The current trend toward low temperature DH systems has been then extensively analyzed. The effects of the possible variation in the heat demand—both in the short term (i.e., daily to seasonal utilization profiles) and in the medium term (e.g., building refurbishment)—on the DH system operation and efficiency, are presented here. The biomass CHP systems are also discussed in the vision to extend the smart grid concept to thermal networks. As a whole, pilot or real‐plant data and validated theoretical models are used to support the analysis.

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A review of laboratory-scale research on lipid conversion to biodiesel with supercritical methanol (2001–2009)

Cited by 119 publications

References 72 publications

Biodiesel Production from Castor Oil under Subcritical Methanol Conditions

Biodiesel Production from Castor Oil under Subcritical Methanol Conditions

Transesterification in Supercritical Conditions

Biomass for Polygeneration and District Heating

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