Chemical Engineering & Technology

Cover image for Vol. 38 Issue 4

Early View (Online Version of Record published before inclusion in an issue)

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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  1. Communications

    1. Fast Measurements of the Gas-Liquid Diffusion Coefficient in the Gaussian Wake of a Spherical Bubble

      Nicolas Dietrich, Jessica Francois, Mélanie Jimenez, Arnaud Cockx, Pascal Guiraud and Gilles Hébrard

      Article first published online: 27 MAR 2015 | DOI: 10.1002/ceat.201400471

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      Since literature data on mass diffusion coefficients are actually not sufficient, a fast method is proposed to obtain oxygen diffusion coefficients from measuring the fluorescence quenching behind a bubble. Planar laser-induced fluorescence with inhibition presents a non-intrusive alternative method to accurately evaluate the gas-liquid diffusivity in a very short time.

  2. Research Articles

    1. Effects of Electrospinning Parameters on Gelatin/Poly(ϵ-Caprolactone) Nanofiber Diameter

      Seza Özge Gönen, Melek Erol Taygun and Sadriye Küçükbayrak

      Article first published online: 27 MAR 2015 | DOI: 10.1002/ceat.201400323

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      In order to use the electrospinning process as a tool for producing materials with targeted fiber diameter for different applications, a simple method was developed for predicting the diameter of electrospun fibers. Validation experiments verified the accuracy of the model which offers an efficient method for fabricating nanofibers with a controllable and predictable fiber diameter.

    2. Strategy for a Scale-up Correlation in a Dissolved Air Flotation Chamber

      Robson de Souza Vasconcelos, Rosangela Cristine da S. Henauth, Alex Elton de Moura, Valdemir Alexandre dos Santos and Leonie Asfora Sarubbo

      Article first published online: 19 MAR 2015 | DOI: 10.1002/ceat.201400665

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      A simple strategy is described to reduce future risks in scale-up investments by using similarity correlations based on the most important gravitational and inertial forces in a dissolved air flotation (DAF) chamber in a lab-scale model. This scale-up strategy allows for designing a pilot DAF based on the laboratory model, requiring relatively inexpensive material.

    3. Response Surface Optimization of Biodiesel Production via Catalytic Transesterification of Fatty Acids

      Maliheh Mir and Seyyed M. Ghoreishi

      Article first published online: 11 MAR 2015 | DOI: 10.1002/ceat.201300328

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      A system composed of a supercritical CO2 extractor and a stirred-batch reactor was developed for biodiesel production from Jatropha seeds oil by alkali catalytic transesterification and acidic catalytic esterification reactions. Different response surface methodology models were proposed to predict yields of fatty acid methyl esters and biodiesel as a function of operating variables.

    4. Feasibility of the Constrained Free Energy Method for Modeling NO Formation in Combustion

      Petteri Kangas, Pertti Koukkari, Anders Brink and Mikko Hupa

      Article first published online: 10 MAR 2015 | DOI: 10.1002/ceat.201400633

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      An alternative thermochemical approach for modeling NOX emissions is proposed. NO emissions in combustion are modeled with the constrained free energy (CFE) method which allows calculations of local restricted thermodynamic equilibrium by implementing reaction kinetic rates as constraints. Thermal and fuel NO emissions were successfully estimated with the CFE approach.

    5. Nafion-H-Catalyzed High-Temperature/High-Pressure Synthesis of a Triarylmethane in Continuous-Flow Mode

      Stephan Hayden, Toma Glasnov and C. Oliver Kappe

      Article first published online: 10 MAR 2015 | DOI: 10.1002/ceat.201400581

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      Friedel-Craft reactions are important types of C–C bond-forming reactions. Here, the synthesis of triarylmethanes from aromatic aldehydes and benzene using the super acid Nafion-H as the catalyst is evaluated under both batch and continuous-flow conditions. Using high-temperature/high-pressure conditions, excellent reaction yields are obtained within a few minutes reaction time.

    6. Ultrasonic Hot Embossed Polymer Microreactors for Optical Measurement of Chemical Reactions

      Alexander Tollkötter, Johannes Sackmann, Tobias Baldhoff, Werner Karl Schomburg and Norbert Kockmann

      Article first published online: 4 DEC 2014 | DOI: 10.1002/ceat.201400522

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      Ultrasonic hot embossing of chemically resistant polymers as a simple and cost-effective fabrication method of microstructures and an optical analysis tool for tracing the progress of chemical reactions are introduced and evaluated. The simplicity of the fabrication method itself and good similarities of produced polymer micromixers with conventional ones made of other materials are pointed out.

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