Chemical Engineering & Technology

Cover image for Vol. 38 Issue 2

Impact Factor: 2.175

ISI Journal Citation Reports © Ranking: 2013: 39/133 (Engineering Chemical)

Online ISSN: 1521-4125

Associated Title(s): Chemie Ingenieur Technik, ChemBioEng Reviews, Energy Technology

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January 07, 2015

Editors' Choice: Advanced TEMKIN Reactor

Editors' Choice: Advanced TEMKIN ReactorCatalyst development for new processes or the improvement of already existing catalytic systems can be divided into a multitude of stages. This process extends from the first idea to the preparation, the catalyst screening, the investigation of the reaction network as well as kinetic studies and long-term tests, up to the scale-up of a new or modified process on the industrial scale. On the laboratory scale, eggshell catalysts are very often used in crushed form to reduce costs caused by the consumption of catalyst and feed streams. It must be noted that, by this approach, not only the geometry of the catalyst is destroyed but also the active shell; thus, mass transport and conductive and convective heat transport are changed. In order to perform significant catalytic tests, it is necessary to test the catalysts in their original shape with an intact shell. P. Claus et al., Technische Universität Darmstadt, presented an advanced TEMKIN reactor that is well suitable for testing of uncrushed industrial eggshell catalysts because of its defined flow pattern and excellent mass and heat transport properties. Because of its simple and robust design, and the small amounts of educts and catalyst, all technical requirements are fulfilled for a fast, competitive, and accurate optimization of prototypes as well as already established catalysts for industrial applications.


Martin Kuhn, Martin Lucas, and Peter Claus
Advanced TEMKIN Reactor: Testing of Industrial Eggshell Catalysts on the Laboratory Scale
Chem. Eng. Technol. 2015, 38 (1), 61–67.
DOI: 10.1002/ceat.201400616


January 07, 2015

Editors' Choice: Continuous Characterization of Biocatalysts

Editors' Choice: Continuous Characterization of BiocatalystsEnzymatic catalysis offers versatile advantages over chemical catalysis: biocatalysts are highly regio-, stereo-, and chemoselective at moderate temperature and pressure. Combined with a usually high specific activity of native enzymes, enzymatic catalysis is an optimal choice for industrial applications. For an appropriate and reliable process design, the estimation of valid kinetic parameters, which are representative for the next scale, is inevitable. The scale-up step from labscale involving screening and characterization to pilot-scale is an often encountered bottleneck in bioprocess development and design. E. Lyagin et al., Technische Universität Berlin, integrated a low-cost dosing concept in a new type of MR-based screening and characterization system. An excellent reproducibility of dosing results in the range of < 2.6 % error as well as long-term stability of the dosing system over 120 h could be achieved. The proposed dosing system was used as a tool for enzyme activity control for continuous NAM hydrolysis with induced enzyme deactivation. The presented characterization system reproduces in small scale many important process variables, which otherwise are only to be found in bench-scale systems.


Evgenij Lyagin, Anja Drews, and Matthias Kraume
Fully Automated Reactor System for Continuous Characterization of (Bio)catalysts
Chem. Eng. Technol. 2015, 38 (1), 15–22.
DOI: 10.1002/ceat.201400135


January 07, 2015
Editors' Choice: Advanced TEMKIN Reactor

January 07, 2015
Editors' Choice: Continuous Characterization of Biocatalysts

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