Chemical Engineering & Technology

Cover image for Vol. 38 Issue 9

Impact Factor: 2.442

ISI Journal Citation Reports © Ranking: 2014: 33/134 (Engineering Chemical)

Online ISSN: 1521-4125

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

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Recently Published Articles

  1. Time-Resolved Fluorescence HPLC Detection Using Semiconductor Light Sources: Principles and Applications

    Stephan Landgraf

    Article first published online: 31 AUG 2015 | DOI: 10.1002/ceat.201500152

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    Commercial systems for simultaneous static and time-resolved fluorescence detection in HPLC systems to date employ simple intensity detection in fluorescence systems with very low sensitivity. A first prototype with a nearly practical setup for use with commercial HPLC systems has been built with a laser diode as excitation source. The application is patent-pending.

  2. Fluid Dynamics of Droplets as a Useful Tool to Determine Coverage and Adsorption Kinetics of Surfactants

    Niklas Paul, Joschka M. Schulz and Matthias Kraume

    Article first published online: 31 AUG 2015 | DOI: 10.1002/ceat.201500137

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    In many industrial applications, interfacially active substances like surfactants may adsorb at the liquid-liquid interface and interfere with transport processes. The fluid dynamic behavior of single droplets was evaluated for the determination of interfacial coverages and as a qualitative and highly reproducible tool to measure the adsorption kinetics of surfactants.

  3. Determination of Particle Size Distributions in Multiphase Systems Containing Nonspherical Fluid Particles

    Robert P. Panckow, Giorgio Comandè, Sebastian Maaß and Matthias Kraume

    Article first published online: 28 AUG 2015 | DOI: 10.1002/ceat.201500123

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    The effect of operating conditions on the bubble size distribution in an aerated stirred vessel measured by a photo-optical device was studied. Approaching the in situ detection of complexly shaped particles with motile boundaries, a variation of the amount of surface-active auxiliaries was performed to show capabilities and limitations by increasing the complexity of the situation.

  4. Power Draw and Gas-Liquid Mass Transfer Characteristics of a Stirred-Tank Reactor with Draft Tube Configuration

    Juergen Lueske, Kishore Kar, Luciano Piras and Jim Pressler

    Article first published online: 28 AUG 2015 | DOI: 10.1002/ceat.201500071

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    Power draw, mixing, liquid circulation, and gas-liquid oxygen transfer were characterized in a large vessel equipped with a draft tube and a mechanical agitation system. The draft tube agitation system is shown to provide a better volumetric mass transfer coefficient compared to the conventional down-pumping system, in addition to a lower holdup, a lower k-factor, and lower-vibration operation.

  5. Effects of Surfactants on Mass Transfer from Single Carbon Dioxide Bubbles in Vertical Pipes

    Jiro Aoki, Kosuke Hayashi, Shigeo Hosokawa and Akio Tomiyama

    Article first published online: 28 AUG 2015 | DOI: 10.1002/ceat.201500063

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    To investigate the effects of surfactants, mass transfer rates, kL, of single CO2 bubbles rising through contaminated water in vertical pipes are measured. The Hatta number plays a key role in interfacial distribution of surfactant, on which kL strongly depends. A kL correlation applicable to fully contaminated ellipsoidal and Taylor bubbles is proposed.

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