Chemical Engineering & Technology

Cover image for Vol. 38 Issue 1

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

Editors' Choice

Every month, the Editors select two papers referring to current discussions in the scientific, public and economic communities and in view of the potential for further developments. The papers are freely accessible for one month.

Distillative Separation

December 05, 2014


Distillation is one of the best explored and most established unit operations in chemical process engineering. Structured packings represent column internals providing high separation efficiency at low pressure drop. For the design of columns with structured packings, several modeling approaches are available. Most of them are based on empirical correlations which are influenced by packing geometry, physicochemical properties of the systems studied as well as by employed measuring methods. For this reason, the correlations often have a limited application. Furthermore, most of the correlations have been developed for low-viscosity aqueous and organic systems. E. Y. Kenig et al. employed a modeling method based on hydrodynamic analogies (HA). Simulations and experiments were compared for various operating pressures and gas loads and the HA modeling method was proven to be capable of predicting the separation efficiency of systems with elevated viscosities in structured packings.

Tim S. Wolf, Christian Bradtmöller, Stephan Scholl, and Eugeny Y. Kenig
Hydrodynamic-Analogy-Based Modeling Approach for Distillative Separation of Organic Systems with Elevated Viscosity
Chem. Eng. Technol. 2014, 37 (12), 2065–2072.
DOI: 10.1002/ceat.201400372



December 05, 2014


The use of enzymes creates opportunities for developing a greener, more sustainable, and increasingly modernized industrial chemistry. Among the hydrolytic enzymes, the lipases possess not only the natural ability to hydrolyze triacylglycerol to glycerol and free fatty acids, but also to catalyze esterification, transesterification, and aminolysis in nonaqueous media. As with any type of catalyst, the stability of lipases is important for their applications in industry. L. M. Pera et al. compared four biocatalysts such as extracellular and mycelium-bound lipase activities from Penicillium corylophilum cultivated in absence and presence of a lipid inductor. In addition, the stability of the four biocatalysts was analyzed and the potential application of this enzyme property in biocatalytic processes was discussed. The presented results suggest that, by manipulating the culture conditions of P. corylophilum, it is possible to produce biocatalysts with different enzymatic properties. Selectively modified enzymes could also be used to decrease the costs of a bioprocess.

Cintia M. Romero, Mario D. Baigorí, Alessandra Machado Baron, Nadia Krieger, and Licia M. Pera
Activity and Stability of Lipase Preparations from Penicillium corylophilum: Potential Use in Biocatalysis
Chem. Eng. Technol. 2014, 37 (12), 1987–1992.
DOI: 10.1002/ceat.201300851