Chemical Engineering & Technology

Cover image for Chemical Engineering & Technology

September, 2012

Volume 35, Issue 9

Pages 1551–1715

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
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      Cover Chem. Eng. Technol. 9/2012

      Version of Record online: 24 AUG 2012 | DOI: 10.1002/ceat.201290052

  2. Editorial Board

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
    1. Editorial Board Chem. Eng. Technol. 9/2012

      Version of Record online: 24 AUG 2012 | DOI: 10.1002/ceat.201290053

  3. Overview

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
  4. Contents

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
    1. You have free access to this content
  5. Editorial

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
    1. You have free access to this content
  6. Forum

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
  7. Scientific Highlights

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
  8. Review

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
    1. Targeting the Production of Biomolecules by Extremophiles at Bioreactor Scale (pages 1565–1575)

      F. J. Deive, E. López, A. Rodríguez, M. A. Longo and M. Á. Sanromán

      Version of Record online: 5 JUN 2012 | DOI: 10.1002/ceat.201100528

      Thumbnail image of graphical abstract

      Recent developments in the production of proteins and molecules from extremophiles at bioreactor scale are reviewed, focusing on different strategies of operation and alternatives of reactor configuration that will help to fill the gap between isolation of novel extremophiles and production at industrial scale. The most common ways to approach the scaling-up of bioprocesses with this kind of microorganisms are presented.

  9. Research Articles

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
    1. You have full text access to this OnlineOpen article
      Rotational Particle Separator as a Compact Gas Scrubber (pages 1576–1582)

      R. Buruma, B. Brouwers and E. van Kemenade

      Version of Record online: 27 JUL 2012 | DOI: 10.1002/ceat.201200188

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      The rotational particle separator is a compact device capable of separating micron-sized droplets from gases by centrifugation. In this study a prototype separator is designed and tested. The experiments performed show the superior separation efficiency and hydrodynamic performance compared to conventional separation techniques.

    2. Thermophoretic Coating with Molybdenum Oxide Nanoparticles (pages 1583–1587)

      L. Boskovic and I. E. Agranovski

      Version of Record online: 27 JUL 2012 | DOI: 10.1002/ceat.201200145

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      The thermophoretic deposition and uniformity of molybdenum oxide nanoparticles, generated by a glowing wire generator, on various surfaces were investigated. SEM and TEM micrographs of the film confirmed that a homogeneous densely packed network of nanoparticles on the surface was built, which is very promising for further technological development and subsequent implementation.

    3. Effect of Seeding on Metal Ion Recovery from Wastewater by Reactive Crystallization of Metal Carbonates (pages 1588–1592)

      Y. Shimizu and I. Hirasawa

      Version of Record online: 24 AUG 2012 | DOI: 10.1002/ceat.201200074

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      A reactive crystallization method for separation and recovery of divalent metal ions from wastewater using a semi-batch crystallizer has been developed which is effective for both effluent purification and metal recycling. Metal removal rates of around 99.9 % on average could be achieved. Applying optimum amounts of seeds, the production of fines was restricted and regular product shapes were attained.

    4. Residence Time Distribution Models Derived from Non-Ideal Laminar Velocity Profiles in Tubes (pages 1593–1603)

      P. R. Pegoraro, M. Marangoni and J. A. W. Gut

      Version of Record online: 15 JUN 2012 | DOI: 10.1002/ceat.201200057

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      Residence time distribution models, based on non-ideal segregated flow, are proposed to represent laminar flow in real systems with diffusion, mechanical vibration, wall roughness, pipe fittings, coils, or corrugated walls. Experimental validation in three tubular systems with different fluids is presented. These models can be useful for the analysis of laminar flow reactors or continuous thermal processing of viscous foods.

    5. Parameter Selection of Emulsification Processes: Conditions for Nano- and Macroemulsions (pages 1604–1608)

      O. S. El Kinawy, S. Petersen, L. Helmdach and J. Ulrich

      Version of Record online: 5 JUL 2012 | DOI: 10.1002/ceat.201100692

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      The formation of emulsions consisting of water, corn oil, and nonionic surfactants using disc systems and high-pressure homogenizers and the effect of different process variables on the droplet size distribution were investigated. Emulsification processes with high-pressure homogenization can lead to emulsions or even to nanoemulsions depending on the selected technical parameters.

    6. Decentralized Control System Design for a Ternary Reactive Distillation with Inert Using Mixed Integer Optimization (pages 1609–1616)

      G. Paramasivan and A. Kienle

      Version of Record online: 7 AUG 2012 | DOI: 10.1002/ceat.201200061

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      Inferential control of ternary reactive distillation with inert is controversially discussed in the literature. For further clarification, a systematic study based on mixed integer dynamic optimization is presented. Special emphasis is placed on robustness with respect to various disturbances arising in practice.

    7. Mathematical Model for Design Parameter Analysis to Improve the Performance of a Desiccant Wheel (pages 1617–1625)

      A. Yadav and V. K. Bajpai

      Version of Record online: 8 JUN 2012 | DOI: 10.1002/ceat.201100536

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      Optimum design parameters of a desiccant wheel were estimated by a newly developed mathematical model in order to reduce weight and size. Factors influencing moisture removal like channel height, pitch, and length of the desiccant wheel were optimized, as well as other design parameters such as area ratio, aspect ratio, and porosity.

    8. Modified Semi-Coke-Supported Cerium Oxide-Doped Zinc Ferrites for the Removal of H2S from Coal Gas (pages 1626–1631)

      J. Mi, G. Feng, L. Han, T. Guo, Y. Zhu and J. Wang

      Version of Record online: 5 JUN 2012 | DOI: 10.1002/ceat.201100540

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      Cerium oxide-doped ZnFe2O4 sorbents supported on modified semi-coke were prepared to improve the desulfurization efficiency of zinc ferrites. The addition of CeO2 enlarges the surface area and the pore volume and improves the dispersion of active components. The increased amount of oxygen adsorbed on the sorbent surface induced by Ce doping facilitates the adsorption of H2S.

    9. pH and Particle Structure Effects on Silica Removal by Coagulation (pages 1632–1640)

      D. Hermosilla, R. Ordóñez, L. Blanco, E. de la Fuente and Á. Blanco

      Version of Record online: 29 MAY 2012 | DOI: 10.1002/ceat.201100527

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      Coagulation is presented as an efficient technique to remove silica from paper mill effluents. Pretreatment by polyaluminum chlorides (PACls) and FeCl3 was optimized prior to reverse osmosis. A higher silica removal was attained when cylindrical particles were formed. PACls with low alumina content and high basicity achieved almost 100 % removal of silica at pH 10.5.

    10. Optimization of Supercritical Extraction of Linalyl Acetate from Lavender via Box-Behnken Design (pages 1641–1648)

      S. M. Ghoreishi, H. Kamali, H. S. Ghaziaskar and A. A. Dadkhah

      Version of Record online: 5 JUN 2012 | DOI: 10.1002/ceat.201100429

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      Essential oil from Isfahan lavender flowers was extracted applying supercritical carbon dioxide in a newly developed periodic static-dynamic procedure and a conventional semicontinuous method for production of camphor, fenchone, linalyl acetate, and linalool. In order to achieve maximum extraction yields, the operating conditions of both methods were optimized by means of response surface design.

    11. Fluid Dynamics of Fluidized and Vibrofluidized Beds Operating with Geldart C Particles (pages 1649–1656)

      L. Meili, R. V. Daleffe and J. T. Freire

      Version of Record online: 15 JUN 2012 | DOI: 10.1002/ceat.201100546

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      Fluid dynamics experiments were carried out in a fluidized/vibrofluidized bed to test and to evaluate the operating behavior with Geldart C particles. Amplitude and frequency of vibration and the dimensionless vibration number were analyzed to investigate their influence on the minimum fluidization velocity, the pressure drop, and the standard deviation of the pressure drop.

    12. Direct Extraction of Propionic Acid from Propionibacterium acidipropionici Broths with Tri-n-octylamine (pages 1657–1663)

      A.-I. Galaction, A. Carlescu, M. Turnea and D. Caşcaval

      Version of Record online: 23 MAY 2012 | DOI: 10.1002/ceat.201200066

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      The reactive extraction of propionic acid with tri-n-octylamine from P. acidipropionici broths was approached from the viewpoint of the interfacial mass transfer rate from the aqueous to the organic phase. The influences of the bacterial cell concentration, the mixing intensity, the solvent polarity and the addition of 1-octanol on the acid mass transfer flow were analyzed.

    13. Novel Single Stage Wash Sedimentator for Purification and Separation of Small Particles (pages 1664–1669)

      H. Anlauf, J. Jeras, M. Feist, J. Scheffler and M. Nussbaumer

      Version of Record online: 7 AUG 2012 | DOI: 10.1002/ceat.201200243

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      An innovative technical concept was developed for simultaneous washing and separation of fine particles. Fundamental aspects were investigated on a laboratory scale, and the process was successfully realized on a pilot scale. The new method is based on a static sedimentation apparatus with integrated countercurrent washing, which operates continuously and produces a purified solid concentrate.

    14. Miniemulsions for the Production of Nanostructured Particles (pages 1670–1676)

      L. L. Hecht, M. Winkelmann, C. Wagner, K. Landfester, W. Gerlinger, B. Sachweh and H. P. Schuchmann

      Version of Record online: 24 AUG 2012 | DOI: 10.1002/ceat.201200196

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      A process for the encapsulation of zinc oxide in polystyrene is developed. The zinc oxide nanoparticles are precipitated in an inverse miniemulsion of water droplets in a continuous monomer phase. The resulting miniemulsion is transferred into a direct miniemulsion, and the particle loaded monomer droplets are afterwards polymerized to hybrid nanoparticles.

    15. Compression Behavior of Moist Spherical Zeolite 4A Granules (pages 1677–1684)

      P. Müller and J. Tomas

      Version of Record online: 24 AUG 2012 | DOI: 10.1002/ceat.201200245

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      In order to investigate the mechanical behavior of zeolite 4A granules compression tests until primary breakage have been carried out. The influence of particle size and moisture content on the force-displacement curve has been analyzed. Moreover, the specific fracture energy distribution and the distribution of the equivalent velocity have been determined.

    16. Analysis of Liquid Jet Breakup in One- and Two-Phase Flows (pages 1685–1691)

      M. Ochowiak, L. Broniarz-Press and S. Rozanska

      Version of Record online: 18 APR 2012 | DOI: 10.1002/ceat.201100577

      Thumbnail image of graphical abstract

      The analysis of the breakup of polymer solutions flowing through an orifice nozzle and of the atomization of a liquid jet by a high-speed gas jet is presented. Analysis of photographs of the jet breakup shows that the jet length depends on the liquid and gas flow rates and on the concentration of the polymer used.

    17. A Novel Low-Pressure Device for Production of Nanoemulsions (pages 1692–1698)

      I. Souilem, R. Muller, Y. Holl, M. Bouquey, C. A. Serra, T. Vandamme and N. Anton

      Version of Record online: 5 JUN 2012 | DOI: 10.1002/ceat.201100676

      Thumbnail image of graphical abstract

      A novel device for the production of nanoemulsions applying a low-pressure technology is described. The influence of process parameters and system composition on droplet size and emulsion stability is investigated. Compared to conventional emulsification techniques, this new process allows a precise control of the droplet size in the range of 30–100 nm only through adjustment of processing parameters.

    18. Oxidation Kinetics of Carbon Deposited on Cerium-Doped FePO4 during Dehydration of Glycerol to Acrolein (pages 1699–1706)

      G. S. Patience, Y. Farrie, J.-F. Devaux and J.-L. Dubois

      Version of Record online: 29 JUN 2012 | DOI: 10.1002/ceat.201200108

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      Catalytically dehydrating glycerol to acrolein has an enormous market potential but carbonaceous species build up on the catalyst surface. The carbon reduces the reaction rate and must be reacted periodically. The oxidation kinetics to react the carbon follows an Eley-Rideal model: 1st order in oxygen and adsorbed carbon.

    19. Enzyme-Catalyzed Synthesis of Conducting Polyaniline Nanocomposites with Pure and Functionalized Carbon Nanotubes (pages 1707–1712)

      M. R. Nabid, M. Shamsianpour, R. Sedghi and A. B. Moghaddam

      Version of Record online: 24 AUG 2012 | DOI: 10.1002/ceat.201100149

      Thumbnail image of graphical abstract

      The in situ enzymatic polymerization of aniline onto multi-walled carbon nanotubes (MWCNT) and carboxylated MWCNT (COOH-MWCNT) is reported. Polymerization was catalyzed with horseradish peroxidase with hydrogen peroxide as the oxidant. The polyaniline (PANI) component was found to be thermally more stable in PANI/COOH-MWCNT compared to PANI/MWCNT composites.

  10. Overview

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Forum
    8. Scientific Highlights
    9. Review
    10. Research Articles
    11. Overview
    1. You have free access to this content

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