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12039973.pdf

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Review

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

Z. Anxionnaza,b, M. Cabassuda,∗, C. Gourdona, P. Tochonb

a Laboratoire de Génie Chimique, UMR 5503 CNRS/INPT/UPS, 5 rue P. Talabot, BP 1301, 31106 Toulouse Cedex 1, France

b Atomic Energy Commission-GRETh, 17 avenue des Martyrs, F-38054 Grenoble Cedex 9, France

Keywords:

Process intensification Heat exchanger reactor State-of-the-art Technology Continuous reactor

Contents

abstract

Process 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.

1. Introduction........................................................................................................................................ 2030

2.

3.

4.

Transposition from batch to continuous heat-exchanger/reactor ................................................................................ 2030

2.1. Thermal intensification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2030

2.2. Flowintensification........................................................................................................................ 2031

2.3. Reactordynamics.......................................................................................................................... 2031

2.4. Residencetime............................................................................................................................. 2031

Reactors with intensified heat exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2032

3.1. Spinning disk reactor (SDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2032

3.2. Microchannelreactors..................................................................................................................... 2032

3.3. Staticmixers............................................................................................................................... 2032

3.4. Oscillatoryflowreactor.................................................................................................................... 2033

Compact heat exchanger reactor (HEX reactor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2033

4.1.

4.2.

Compact heat exchangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2033 4.1.1. Plate-type heat exchangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2033 4.1.2. Extended surface heat exchangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2034 Influence of inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2034

4.2.1. 4.2.2. 4.2.3. 4.2.4.

Offset strip fins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2034 Metallic foams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2035 Vortex generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2036 Patented fins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2037



4.3. Applications................................................................................................................................ 2037 4.3.1. MarbondTM ....................................................................................................................... 2038 4.3.2. Plate heat exchanger reactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2039

Corresponding author. Tel.: +33 5 34 61 52 59; fax: +33 5 34 61 52 53. E-mail address: Michel.Cabassud@ensiacet.fr (M. Cabassud).

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 Supercritical Fluid Extraction 12039973.pdf Page 001
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