Rapid Production of Biodiesel in Mesoscale Oscillatory Baffled Reactors
Identifieur interne : 000080 ( PascalFrancis/Checkpoint ); précédent : 000079; suivant : 000081Rapid Production of Biodiesel in Mesoscale Oscillatory Baffled Reactors
Auteurs : Anh N. Phan [Royaume-Uni] ; Adam P. Harvey [Royaume-Uni] ; Valentine Eze [Royaume-Uni]Source :
- Chemical engineering & technology [ 0930-7516 ] ; 2012.
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- topic : Production.
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Abstract
Continuous alkali-catalyzed transesterification of rapeseed oil with methanol was carried out in three mesoreactor designs. The induction time decreased with oscillatory Reynolds number for all three reactors. Stable steady states were achieved within induction times of 1.5, 2.5, and 4.0 residence times for the integral, wire wool, and helical baffle designs, respectively. Both experimental and simulated results indicated that under the given conditions there is an optimal residence time for homogeneous transesterification. Higher residence times resulted in reduced fatty acid methyl ester content due to the saponification side reaction. The results demonstrate that biodiesel can be produced at an industrially acceptable level of conversion (> 95 %) in < 5 min residence time. This requires a combination of high catalyst concentration and good mixing.
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Baffle</term>
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<term>Design</term>
<term>Induction</term>
<term>Mixing</term>
<term>Production</term>
<term>Reactor</term>
<term>Reynolds number</term>
<term>Saponification</term>
<term>Steady state</term>
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<term>Wire</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Production</term>
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<term>Réaction catalytique</term>
<term>Transestérification</term>
<term>Conception</term>
<term>Induction</term>
<term>Nombre Reynolds</term>
<term>Régime permanent</term>
<term>Fil métallique</term>
<term>Chicane</term>
<term>Saponification</term>
<term>Catalyseur</term>
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<front><div type="abstract" xml:lang="en">Continuous alkali-catalyzed transesterification of rapeseed oil with methanol was carried out in three mesoreactor designs. The induction time decreased with oscillatory Reynolds number for all three reactors. Stable steady states were achieved within induction times of 1.5, 2.5, and 4.0 residence times for the integral, wire wool, and helical baffle designs, respectively. Both experimental and simulated results indicated that under the given conditions there is an optimal residence time for homogeneous transesterification. Higher residence times resulted in reduced fatty acid methyl ester content due to the saponification side reaction. The results demonstrate that biodiesel can be produced at an industrially acceptable level of conversion (> 95 %) in < 5 min residence time. This requires a combination of high catalyst concentration and good mixing.</div>
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