A PLS regression model using NIR spectroscopy for on-line monitoring of the biodiesel production reaction

Killner, Mário Henrique Montazzolli; Rohwedder, Jarbas José R.; Pasquini, Célio

doi:10.1016/j.fuel.2011.06.025

Cited by 63 publications

(36 citation statements)

References 26 publications

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“…They generally require special training, samples collection and involve solvent for sampling preparation. Up to now, only a few works with different analytical techniques such as mid-infrared (MIR) spectroscopy [22,23], near infrared (NIR) spectroscopy [24][25][26][27], Raman spectroscopy [28], ultrasonication-assisted spray ionization mass spectroscopy [29], fluorescence [30] or UV spectroscopy [31] are able to on-line monitor organic reactions (mostly different from transesterification reaction). With these methods, process state can be obtained from whole sample finger-printing.…”

Section: Introductionmentioning

confidence: 99%

On-line monitoring of the transesterification reaction carried out in microreactors using near infrared spectroscopy

Richard

Dubreuil

Thiébaud‐Roux

et al. 2013

Fuel

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Biodiesel can be produced from vegetable oils, animal fats, and waste cooking oils by transesterification with ethanol (also called ethanolysis) in order to substitute fossil fuels. In this work, the batch ethanolysis of high oleic sunflower oil was transferred into a continuous microstructured device, which induces a better control of heat and mass transfers. Various parameters were studied, notably the initial ethanol to oil molar ratio.An innovative method using NIR spectroscopy was also developed to on-line monitor the transesterification reaction of high oleic sunflower oil with ethanol in microreactors (circular PFA tube 1/16" OD, 0.02" ID). The reactions were monitored directly in the microreactors through sequential scans of the reaction medium by the means of an adequate probe. The asset of the method is that no sample collection or preparation is necessary. Partial least squares regression was used to develop calibration and prediction models between NIR spectral data and analytical data obtained by a reference method (gas chromatography with flame ionization detection, GC-FID). This method is fast, safe, reliable, non destructive and inexpensive contrary to conventional procedures, such as gas chromatography and high performance liquid chromatography generally used to determine the composition of crude transesterification medium.

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Section: Introductionmentioning

confidence: 99%

On-line monitoring of the transesterification reaction carried out in microreactors using near infrared spectroscopy

Richard

Dubreuil

Thiébaud‐Roux

et al. 2013

Fuel

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“…Ultrasound is a mechanical wave that propagates in fluids or solid materials at frequencies greater than 20 kHz, i.e., out of the audible range for healthy humans [19][20][21][22][23][24][25].…”

Section: Ultrasound As a Tool For Liquid Characterizationmentioning

confidence: 99%

Ultrasound as a Metrological Tool for Monitoring Transesterification Kinetics

Baêsso¹,

Oliveira²,

Moraes³

et al. 2018

Advanced Chemical Kinetics

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Ultrasound has been widely used as a technological alternative way to analyse noninvasively an assortment of materials. It includes liquids with dissimilar physical characteristics, including mono-and multi-phasic mixtures, suspension formation and dissolution, in-line processing, among other practical applications. Regardless the huge spread of uses, so far ultrasound has not been proved to be able to quantify transesterification kinetics with a metrological approach. The aim of this chapter is to demonstrate that a properly designed ultrasonic experiment can be developed to identify remarkable stages of a transesterification reaction to produce biodiesel. The method was compared both with gas chromatography and hydrogen nuclear magnetic resonance ( 1 H NMR). For an in-line application, ultrasound has been proved to work properly as a monitoring tool for chemical reaction kinetics.

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“…This can be accomplished, for example, using infrared monitoring. [6][7][8] Recently, the refraction index was used to study the mechanism of a transesterification reaction by this method. 9,10 With the aim to develop a simple procedure for monitoring this reaction in real time so that more detailed investigations about the transesterification reaction can be conducted, the feasibility of using an analytical balance was studied.…”

Section: Introductionmentioning

confidence: 99%

Continuous Monitoring of a Transesterification Reaction Using an Analytical Balance

Tubino

Júnior

Salomão

2017

J. Braz. Chem. Soc.

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A PLS regression model using NIR spectroscopy for on-line monitoring of the biodiesel production reaction

Cited by 63 publications

References 26 publications

On-line monitoring of the transesterification reaction carried out in microreactors using near infrared spectroscopy

On-line monitoring of the transesterification reaction carried out in microreactors using near infrared spectroscopy

Ultrasound as a Metrological Tool for Monitoring Transesterification Kinetics

Continuous Monitoring of a Transesterification Reaction Using an Analytical Balance

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