2- and 3-Stage temperature ramping for the direct synthesis of adipic acid in micro-flow packed-bed reactors

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dc.contributor.authorShang, M.
dc.contributor.authorNoël, T.
dc.contributor.authorWang, Q.
dc.contributor.authorSu, Y.
dc.contributor.authorMiyabayashi, K.
dc.contributor.authorHessel, V.
dc.contributor.authorHasebe, S.
dc.date.issued2015
dc.description.abstractThe synthesis of adipic acid from cyclohexene and hydrogen peroxide was investigated in micro-flowpacked-bed reactors. The isolated yield of adipic acid increases with increasing residence time inmicro-flow packed-bed reactors. The addition of phosphoric acid cannot effectively improve the isolatedyield of adipic acid though it is generally known to reduce the decomposition of H2O2. Then, differenttemperatures were tested along the reactor length, since the adipic acid synthesis is known to consistof 6 elementary reactions with different temperature needs. For experiments with 2-stage temperatureramping, 70°C and 100°C, respectively, are the optimal temperatures for the first stage and second stagereactor, which lead to 63% isolated yield of adipic acid. Furthermore, 3-stage temperature rampingimproves the yield of adipic acid to 66%. Multi-injection of hydrogen peroxide at different stages doesnot lead to a further increase in adipic acid yield. Although high temperatures are used in this transfor-mation, the in-line recording of temperature profiles along the flow axis shows that safe operation for thisexothermic reaction can be realized in the micro-flow packed-bed reactors. Notably, the space–timeyields in micro-flow packed-bed reactors are more than one order of magnitude higher than thoseobtained in batch reactors.
dc.description.statementofresponsibilityMinjing Shang, Timothy Noël, Qi Wang, Yuanhai Su, Keisuke Miyabayashi, Volker Hessel, Shinji Hasebe
dc.identifier.citationChemical Engineering Journal, 2015; 260:454-462
dc.identifier.doi10.1016/j.cej.2014.08.061
dc.identifier.issn1385-8947
dc.identifier.issn1873-3212
dc.identifier.orcidHessel, V. [0000-0002-9494-1519]
dc.identifier.urihttp://hdl.handle.net/2440/120769
dc.language.isoen
dc.publisherElsevier
dc.rights© 2014 Elsevier B.V. All rights reserved
dc.source.urihttps://doi.org/10.1016/j.cej.2014.08.061
dc.subjectAdipic acid; hydrogen peroxide; micro-flow packed-bed reactor; temperature ramping; novel process windows
dc.title2- and 3-Stage temperature ramping for the direct synthesis of adipic acid in micro-flow packed-bed reactors
dc.typeJournal article
pubs.publication-statusPublished

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