Intensification of TEMPO-mediated aerobic alcohol oxidations under three-phase flow conditions

Aellig, Christof; Scholz, David; Conrad, Sabrina; Hermans, Ive

doi:10.1039/c3gc40159f

Cited by 75 publications

(60 citation statements)

References 58 publications

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“…Due to the strong shear force generated by centrifugal forces in the CCCS, liquid-liquid mixing is enhanced considerably, accelerating reactions with fast kinetics that are limited by mass transfer. [134] Typically, microreactors have been used for single liquid phase and biphasic (gas-liquid or liquid-liquid) catalytic transformation of biomass derivatives to valuable products using homogeneous or heterogeneous catalysts (e. g., the (biphasic) synthesis of furans from sugars, [135][136][137][138][139][140][141][142][143][144] (aerobic) oxidation, [144][145][146][147][148][149] and hydrogenation of biomass derivatives [144,[150][151][152][153] ). [126] Another intensified reactor configuration for multiphase (gasliquid or liquid-liquid) catalytic biomass transformation is the spinning disc reactor, consisting of a rotating disc around which fluids are fed.…”

Section: Process Intensification For Biomass Conversionmentioning

confidence: 99%

“…In such cases, the synthesis of DFF appears to be more feasible if performed in continuous flow reactors. [146] A gas-liquid slug flow was generated before entering the packed bed. [269] A continuous flow aerobic HMF oxidation was performed in a packed bed stainless steel milli-reactor (d C = 7.85 mm; 5 % Pt on a variety of inorganic supports as catalyst) in a gas-liquid upflow in the [269] However, it was only possible to successfully convert HMF at very low feed concentrations (< 3 wt %) as higher concentrations led to FDCA product precipitation due to its low solubility in water.…”

Section: Oxidation Of Hmf To Dff Fdca and Other Productsmentioning

confidence: 99%

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Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

2019

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Biomass as a renewable and abundantly available carbon source is a promising alternative to fossil resources for the production of chemicals and fuels. The development of biobased chemistry, along with catalyst design, has received much research attention over recent years. However, dedicated reactor concepts for the conversion of biomass and its derivatives are a relatively new research field. Continuous flow microreactors are a promising tool for process intensification, especially for reactions in multiphase systems. In this work, the potential of microreactors for the catalytic conversion of biomass derivatives to value-added chemicals and fuels is critically reviewed. Emphases are laid on the biphasic synthesis of furans from sugars, oxidation and hydrogenation of biomass derivatives. Microreactor processing has been shown capable of improving the efficiency of many biobased reactions, due to the transport intensification and a fine control over the process. Microreactors are expected to contribute in accelerating the technological development of biomass conversion and have a promising potential for industrial application in this area.

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Section: Process Intensification For Biomass Conversionmentioning

confidence: 99%

Section: Oxidation Of Hmf To Dff Fdca and Other Productsmentioning

confidence: 99%

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

2019

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“…Moreover, the TEMPO resins were completely recyclable (used for over 100 trials), showing no loss in activity. Further intensification was demonstrated by Hermans et al 320 A packed-bed microreactor was operated under threephase conditions. The reactor was filled with silica immobilized TEMPO.…”

Section: Electrochemical Oxidation Processes In Continuous Flowmentioning

confidence: 99%

Liquid phase oxidation chemistry in continuous-flow microreactors

et al. 2016

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Continuous-flow liquid phase oxidation chemistry in microreactors receives a lot of attention as the reactor provides enhanced heat and mass transfer characteristics, safe use of hazardous oxidants, high interfacial areas, and scale-up potential. In this review, an up-to-date overview of both technological and chemical aspects of liquid phase oxidation chemistry in continuous-flow microreactors is given. A description of mass and heat transfer phenomena is provided and fundamental principles are deduced which can be used to make a judicious choice for a suitable reactor. In addition, the safety aspects of continuous-flow technology are discussed. Next, oxidation chemistry in flow is discussed, including the use of oxygen, hydrogen peroxide, ozone and other oxidants in flow. Finally, the scale-up potential for continuous-flow reactors is described.

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“…NO is another cooxidant for these oxidations, which requires oxygen for recycle of the NO (327). Hypervalent iodine can also be the co-oxidant (328).…”

Section: Tempo Oxidationsmentioning

confidence: 99%

Managing Hazardous Reactions and Compounds in Process Chemistry

Ager¹

2014

ACS Symposium Series

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Intensification of TEMPO-mediated aerobic alcohol oxidations under three-phase flow conditions

Cited by 75 publications

References 58 publications

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

Liquid phase oxidation chemistry in continuous-flow microreactors

Managing Hazardous Reactions and Compounds in Process Chemistry

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