Heat pipe controlled syntheses of ionic liquids in microstructured reactors

Löwe, Holger; Axinte, R.D.; Breuch, Denis; Hofmann, C.

doi:10.1016/j.cej.2009.07.022

Cited by 21 publications

(10 citation statements)

References 4 publications

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“…Recently, the heat-pipe cooling, coming from the above-mentioned cooling of microelectronics, was bridged to microreactor technology, i.e., using two separate devices and thus decoupling the amount of heat transferred and the heat exchange surface area [17]. If the ambition is, however, to allow integration of the reaction and heat exchanger device, the solution is enhanced flow structuring and guiding.…”

Section: Intensification Of Micro Heat Transferre-entrance Flowsmentioning

confidence: 99%

3D Analysis of Heat Transfer Intensification by Re‐Entrance Flow Pin‐Fins Microstructures with a Highly Thermal‐Conductive Plate

et al. 2011

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Joule heat-induced hot-spot formation sets severe limits in the operation of continuous annular electrochromatography (CAEC), a new concept for preparative separation as an analog to analytical capillary electrochromatography (CEC). This may lead to eluent flow perturbance, even to boiling, which would massively weaken separation efficiency and may even hamper the stationary phase used for separation. For reasons of system integration and high-efficiency heat transfer, micro flow heat exchangers are considered with a separate coolant flow. A 3D numerical analysis of the heat transfer of water single-phase laminar flow in a square microchannel and different arrays of micro pin-fins was carried out using COMSOL Multiphysics. Several advanced materials with low electric conductivity and at the same time with high heat conductivity were put forward to be used in the CAEC system. As essential design point, it is proposed to constitute the micro heat exchanger from two different parts of the CAEC system, namely a microstructured pin-fins plate and a so-called conductive plate.

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Section: Intensification Of Micro Heat Transferre-entrance Flowsmentioning

confidence: 99%

3D Analysis of Heat Transfer Intensification by Re‐Entrance Flow Pin‐Fins Microstructures with a Highly Thermal‐Conductive Plate

et al. 2011

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“…The thermal sensitivity is below 0.08°C at 30°C. 1 H-NMR and IR analytical measurements were done as previously described in [12].…”

Section: Methodsmentioning

confidence: 99%

“…The application of heat pipes on top of the reactor plate can solve these problems by passive dynamic cooling [12]. Conventionally available heat pipes fabricated as closed tubes contain a very small amount of an evaporable liquid (see Fig.…”

Section: Introductionmentioning

confidence: 99%

“…An economic processing in standard lab-scale or pilot-scale equipments seems to be impossible. Therefore, as proof of principle, the successful application of a simple single-channel microreactor equipped with heat pipes as cooling devices was described previously for the synthesis of a respective quaternary 1,3-di-methylimidazolium trifluoromethanesulfonate salt, appearing as a solid at room temperature [12].…”

Section: Introductionmentioning

confidence: 99%

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Heat Pipe‐Cooled Microstructured Reactor Concept for Highly Exothermal Ionic Liquid Syntheses

et al. 2010

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Heat pipes used for cooling of microstructured reactors are a new approach for sustainable processing also in the lab-scale within a temperature range from ambient to more than 180°C. The main advantage of heat pipe cooling is the dynamic behavior, i.e., the cooling rate depends on the heat released. Heat pipes can also suppress thermal runaways due to their extremely short response times on momentary temperature rises. As an example, the highly exothermal synthesis of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate from the respective reactants 1-ethyl-imidazole and methyltrifluoromethanesulfonate was investigated. By transferring the protocol to continuous-flow conditions in the microscale and by applying cooling with heat pipes, an out-of-control processing can be avoided.

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“…The productivity of the system can reach up to 0.74 kg h −1 . 18 The combination of different types of mixers and reactor designs with different temperature profiles was assayed to adjust the overall performance of the process. Hence, a production rate up to 1.24 kg h −1 of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][OTf ]) can be achieved.…”

Section: Isabel Burguetementioning

confidence: 99%

Ionic liquids and continuous flow processes: a good marriage to design sustainable processes

et al. 2015

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Heat pipe controlled syntheses of ionic liquids in microstructured reactors

Cited by 21 publications

References 4 publications

3D Analysis of Heat Transfer Intensification by Re‐Entrance Flow Pin‐Fins Microstructures with a Highly Thermal‐Conductive Plate

3D Analysis of Heat Transfer Intensification by Re‐Entrance Flow Pin‐Fins Microstructures with a Highly Thermal‐Conductive Plate

Heat Pipe‐Cooled Microstructured Reactor Concept for Highly Exothermal Ionic Liquid Syntheses

Ionic liquids and continuous flow processes: a good marriage to design sustainable processes

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