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Design of a modularized, intensified milli-reactor for production scale
Poster Title: Design of a modularized, intensified milli-reactor for production scale
Submitted on 06 Feb 2017
Author(s): L.Sengen1,2, R. Kuwertz1 J. Heck1, M. Grünewald2
Affiliations: 1Ehrfeld Mikrotechnik BTS GmbH, Wendelsheim, D / 2Ruhr-Universität, Bochum, D
This poster was presented at Flow Chemistry Europe 2017
Poster Views: 1,502
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Poster Information
Abstract: Reactors on a milli-scale gain increasing interest in chemical and pharmaceutical production due to the transfer of micro-structured equipment for process intensifica-tion to production scale. Micro-structured devices are characterized by intensified heat exchange capacity due to high surface-to-volume ratios, concurrently coming along with narrow and defined residence time distributions.

In this contribution we present a milli-structured, capacity and product flexible reactor that allows for scale-up from lab to production scale. The Miprowa® reactor, produced by Ehrfeld Mikrotechnik BTS GmbH, is based upon conventional tube heat exchangers. On the product side, the Miprowa® offers high surface-to-volume ratios and, consequently, an intense heat exchange capacity due to flat rectangular channels. The product channels may be equipped with static mixing elements, offering a significantly increased heat exchange capacity. Further, the axial velocity compounds are homogenized, causing narrow and defined residence time distributions. Generally, the static mixing elements induce a thermal and hydrodynamic homogenization of the flow and enable intensified dispersion in multiphase systems.

The scale-up of the Miprowa® is realized in a multi-dimensional approach, increasing the reactor volume by enlarging characteristic channel dimensions in specified boundaries concerning the aspect ratio, what is the relation between channel height/ width (Sizing-up). Further, reactor volume is increased by enabling parallel flow through a varied number of product channels inside the apparatus (Equaling-Up).

In this contribution, we present results from heat and mass transfer experiments in the production scale Miprowa® Matrix apparatus. Based on the characterization ex-periments, the influence of design parameters, e.g. stall angle of the static mixing elements, is discussed and evaluated. Further, the results of a model based design of an exemplary chemical reaction in a production scale Miprowa® are presented, allowing for a considerable evaluation and classification of the reactor’s performance.
Summary: Conversion from batch to continuous can be done in millireactors starting from lab scale up to production. Significantly increased heat exchange capacities and narrow and defined residence time distributions are proofed.References: [1] Cengel: Heat and Mass Transfer. A practical approach. Third Edition. Singapure (u.a.): McGraw-Hill, 2006
[2] Rathore, Raul: Engineering Heat Transfer. Second Edition. Sudbury: Jones and Bartlett Publishers, Inc., 2009
[3] Lie et al. (1996): Hydrodynamics and heat transfer of rheologically complex fluids in a Sulzer SMC static mixer, Chemical Engineering Science 51 (10) 1947-1955
[4] Genetti (1982): Laminar flow heat transfer with inline mixers inserts. Chem. Eng. Commun. 14 (1) 47-57
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