Intensification of biodiesel synthesis using zigzag micro-channel reactors

Zhang, Wen; Yu, Xinhai; Tu, Shan‐Tung; Yan, Jinyue; Dahlquist, Erik

doi:10.1016/j.biortech.2009.01.022

Cited by 155 publications

(100 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Depending on the reactional scheme and the thermokinetic properties of the system, continuous processes may withdraw existing obstacles of batch processes such as numerous steps, secondary reactions, stable equilibria and difficulties to separate the reaction products. Several works on biodiesel production using microreactors have recently been published [11][12][13][14]. The methanolysis system is complex due to changing phase equilibria [15]: two 4 immiscible phases are present at the beginning (vegetable oil and methanol), then a single phase appears after a few minutes of reaction.…”

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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…For instance, 98% soybean conversion was achieved at 60°C with contact time 180 s [60]. This result was further improved to 99.5% conversion at 56°C and 28 s contact time by improving the microreactor configuration, with zig-zag channels and optimised micromixers [61].…”

Section: -Organometallic and Enzyme-catalysed Reactions In Organic Symentioning

confidence: 94%

Continuous flow (micro-)reactors for heterogeneously catalyzed reactions: Main design and modelling issues

Rossetti

2018

Catalysis Today

View full text Add to dashboard Cite

“…Some of the technologies have been applied successfully in commercial production (Qiu et al, 2010) where the reaction rate is greatly enhanced and thus residence time may be reduced. To reduce the limitations of mass and heat transfer in chemical reactions, literature recommends to conduct such reactions in micro-reactors (Pohar and Plazl, 2008;Hessel et al, 2005;Wen et al, 2009) and in packed bed reactors (Yu et al, 2010;Santacesaria et al, 2011;Su, 2011) or assisted reaction with hydrodynamic cavitation (Gogate et al, 2008;Sedahmed et al, 2011;, microwave (Gole and Gogate, 2013) and ultrasound Gole and Gogate, 2013;Gobikrishnan et al, 2013).…”

Section: Intensification Technologies In Continuous Mode For Scmmentioning

confidence: 99%

“…Higher conversion and selectivity were obtained in a shorter reaction time as compared to batch system. Wen et al (2009) reported the influence of the main geometric parameters on the performance of the zigzag micro-channel reactors in the continuous alkali-catalyzed biodiesel synthesis. The authors concluded that the high reaction efficiency of the zigzag micro-channel reactor can be attributed to the intensification of the overall volumetric mass transfer by passive mixing at the microscale.…”

Section: Intensification Technologies In Continuous Mode For Scmmentioning

confidence: 99%

Biodiesel production through non-catalytic supercritical transesterification: current state and perspectives

Silva

Oliveira

2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-The inconveniences of the conventional method for biodiesel production by alkaline catalysis suggests research towards alternative methods, with the non-catalytic transesterification using an alcohol at supercritical conditions proposed as a promising technique for biodiesel production. The so-called supercritical method (SCM) has powerful advantages over conventional techniques, such as fast reaction rates, feedstock flexibility, production efficiency and environmentally friendly benefits. However, application of this methodology has some limitations, like operating conditions (elevated temperature and pressure and higher amounts of alcohol), which result in high energy costs and degradation of the products generated. In this review paper the state of the art in relation to the use of the SCM for biodiesel production is reported and discussed, describing the characteristics of the method, the influence of operational parameters on the ester yield, patents available in the field and the perspectives for application of the technique.

show abstract

Intensification of biodiesel synthesis using zigzag micro-channel reactors

Cited by 155 publications

References 21 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

Continuous flow (micro-)reactors for heterogeneously catalyzed reactions: Main design and modelling issues

Biodiesel production through non-catalytic supercritical transesterification: current state and perspectives

Contact Info

Product

Resources

About