Numerical simulation of mixing and reaction of Jatropha curcas oil and ethanol for synthesis of biodiesel in micromixers

Santana, Harrson Silva; Silva, João L.; Taranto, Osvaldir Pereira

doi:10.1016/j.ces.2015.04.014

Cited by 43 publications

(15 citation statements)

References 24 publications

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“…The corresponding quantity of mesh nodes varied from 104 500–5 530 000 and pressure drop varied less than 2 % for 2 100 000 nodes, corresponding to an average element size of 17.5 μm, as seen in Figure . This result is in the same order of magnitude as those found by Santana et al and Yang et al for microchannels of similar dimensions.…”

Section: Resultssupporting

confidence: 90%

“…It was also verified that mixing reached stagnation at 250 μL min −1 . Liu et al and Santana et al verified the same effect on T‐junctions. At the stagnation flow rate, mixing depends mainly on the slow diffusional mechanism, and cannot be increased as approximation between species molecules by convective transport is at the maximum degree.…”

Section: Resultsmentioning

confidence: 71%

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Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

et al. 2018

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Microreactors eliminate batch‐to‐batch variability and allow better control over nanocrystal synthesis. A serpentine microreactor fabricated by femtosecond laser ablation is presented and characterized by computational fluid dynamics, since the micro channels show a trapezoidal cross‐section mainly due to the relatively high numerical aperture of the focusing lens. Mixing, macro and micro, throughout the device was investigated for inlet flow rates between 10–500 μL min−1 and the injection of an inert tracer with the same transport properties of water. The simulation of the whole microreactor enabled the analysis of the formation and destruction of structures. For instance, secondary flows played a major role in mixing behaviour: small flow rates did not promote mixing of the tracer and a stream of pure water even after 43 curved segments, while they were perfectly mixed after 9 segments for higher flow rates. According to the mixing index, the maximum effect of convective mixing was achieved for an inlet flow rate of 250 μL min−1. Tracer dispersion and the mixing index guided a scale‐up process of the microreactor, optimizing the number of curved segments while increasing total throughput. The upscaled design exhibited mixing saturation at 400 μL min−1 and promoted better control of residence time to allow nanocrystal growth.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 71%

Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

et al. 2018

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“…In experimental study, they reported 99.53%, while in numerical investigation, they noted only 91.53 of FAEE yield. Santana et al also performed the similar study.…”

Section: Introductionmentioning

confidence: 60%

Biodiesel production in a serpentine minireactor—Effect of flow distribution

et al. 2019

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Summary The present work aims to find out the influence of flow pattern on pressure drop and fatty acid methyl ester (FAME) yield in a reactive system. Experiments are carried out with Jatropha oil and methanol by using potassium hydroxide (KOH) as catalyst for biodiesel production in two serpentine minireactors made of glass capillary of 2‐mm internal diameter. One is having a circular cross section, and the other is annulus. Slug flow, slug with droplet flow, and dispersed flow are observed in both the reactors. Effects of flow distribution on pressure drop and FAME yield have been studied. FAME yield of 98.5% is observed in both reactors for a molar ratio 20 (methanol to Jatropha oil), and the time for this yield in the first reactor is 16.6 minutes and that for the second reactor is 7.7 minutes. Higher yield also resulted in lower pressure drop due to lower viscosity of biodiesel in comparison with oil.

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“…Their applications in chemical engineering include sprays (Davanlou et al, 2015) and jets (Homma et al, 2006;Nabavi et al, 2015) from nozzles, the droplet impingement on walls (Mahulkar et al, 2015), compounding in micro-devices (Santana et al, 2015;Wang et al, 2015), stirred tanks (Solsvik and Jakobsen, 2015), bubble columns and high-viscosity mixers (Barailler et al, 2006). Efficient, accurate and robust computation of these flow problems are gaining increasing attentions in recent years.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of two-phase flows in complex geometries by using the volume-of-fluid/immersed-boundary method

Sun

Sakai

2016

Chemical Engineering Science

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Numerical simulation of mixing and reaction of Jatropha curcas oil and ethanol for synthesis of biodiesel in micromixers

Cited by 43 publications

References 24 publications

Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

Biodiesel production in a serpentine minireactor—Effect of flow distribution

Numerical simulation of two-phase flows in complex geometries by using the volume-of-fluid/immersed-boundary method

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