Microchemical systems: Status, challenges, and opportunities

Jensen, Klavs F.

doi:10.1002/aic.690451003

Cited by 194 publications

(126 citation statements)

References 17 publications

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“…A feature of microreactors that is currently exploited is the presumption that "smaller is safer" [7], i.e. chemical processes at extreme pressure and temperature conditions and with toxic or explosive species can be studied without the safety issues associated with larger scale systems [8][9][10]. In this paper we focus on chemistry under high-pressure conditions, using a reaction system based on a microfluidic glass chip with a volume in the hundreds of nanoliter range.…”

Section: Introductionmentioning

confidence: 99%

Fabrication, mechanical testing and application of high-pressure glass microreactor chips

Tiggelaar¹,

Benito‐Lopez²,

Hermes³

et al. 2007

Chemical Engineering Journal

115

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The design, fabrication and high-pressure performance of several in-plane fiber-based interface geometries to microreactor chips for highpressure chemistry are discussed, and an application is presented. The main investigated design parameters are the geometry of the inlet/outlet structure, the manner in which top and bottom wafer are bonded and the way the inlets/outlets turn over into the microfluidic channels.Destructive pressure experiments with H 2 O and liquid CO 2 showed that the maximum pressure that the proposed inlet/outlet structures can withstand is in the range of 180-690 bar. The optimal geometry for high-pressure microreactor chips is a tubular structure that is etched with hydrofluoric acid (HF) and suitable for fibers with a diameter of 110 m. These inlets/outlets can withstand pressures up to 690 bar. On the other hand, small powderblasted inlets/outlets that are smoothened with HF and with a sharp transition towards the flow channels are adequate for working pressures up to 300 bar.Microreactor chips with tubular inlet/outlet geometries were used for studying the formation of the carbamic acid of N-benzylmethylamine and CO 2 . These chips could be used for pressures up to 400 bar without problems/failure, thereby showing that these micromachined microreactor chips are attractive tools for performing high-pressure chemistry in a fast and safe way.

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Section: Introductionmentioning

confidence: 99%

Fabrication, mechanical testing and application of high-pressure glass microreactor chips

Tiggelaar¹,

Benito‐Lopez²,

Hermes³

et al. 2007

Chemical Engineering Journal

115

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“…The integration of microchannel reactor system and heat exchanger system is the main technique of the MCT. Further study of it will provide important theoretical directions for the miniaturization of fuel cell hydrogen source and accelerate its commercialization [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

CO selective oxidation in a microchannel reactor for PEM fuel cell

Chen

Yuan

et al. 2004

Chemical Engineering Journal

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“…Moreover, chemical reactions under aggressive conditions of pressure and temperature can be performed. As a consequence the entire chemical path would have to be rethought [22,23]. Indeed, reactions which were performed during many hours in a batch reactor will last only few minutes in a microchannel one.…”

Section: Microchannel Reactorsmentioning

confidence: 99%

“…[29] have been successfully performed and future works aim at scaling up these lab scale experimentations to pilot or even plant scale. However, even if numbering up is attractive it is not as easy as it seems and that is the reason why many processes are not yet industrial [22,24].…”

Section: Microchannel Reactorsmentioning

confidence: 99%

Heat exchanger/reactors (HEX reactors): Concepts, technologies: State-of-the-art

Anxionnaz

Cabassud

Gourdon

et al. 2008

Chemical Engineering and Processing: Process Intensification

216

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a b s t r a c tProcess intensification is a chemical engineering field which has truly emerged in the past few years and is currently rapidly growing. It consists in looking for safer operating conditions, lower waste in terms of costs and energy and higher productivity; and a way to reach such objectives is to develop multifunctional devices such as heat exchanger/reactors for instance.This review is focused on the latter and makes a point on heat exchanger/reactors. After a brief presentation of requirements due to transposition from batch to continuous apparatuses, heat exchangers/reactors at industrial or pilot scales and their applications are described.

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Microchemical systems: Status, challenges, and opportunities

Cited by 194 publications

References 17 publications

Fabrication, mechanical testing and application of high-pressure glass microreactor chips

Fabrication, mechanical testing and application of high-pressure glass microreactor chips

CO selective oxidation in a microchannel reactor for PEM fuel cell

Heat exchanger/reactors (HEX reactors): Concepts, technologies: State-of-the-art

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