Chemical Engineering & Technology

Cover image for Vol. 36 Issue 4

April, 2013

Volume 36, Issue 4

Pages 535–703

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Overview
    1. You have free access to this content
      Cover Chem. Eng. Technol. 4/2013

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ceat.201390012

  2. Editorial Board

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Overview
    1. Editorial Board Chem. Eng. Technol. 4/2013

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ceat.201390013

  3. Overview

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Overview
  4. Contents

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

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Overview
  6. Research Articles

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Overview
    1. CFD-assisted Characterization and Optimization of the Structured Mass Transfer Packing QVF DURAPACK® (pages 545–551)

      C. Dreiser, G. Gneist and H.-J. Bart

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200531

      Thumbnail image of graphical abstract

      To optimize the glass packing QVF DURAPACK® with regard to extraction efficiency, a detailed understanding of the hydrodynamic behavior is crucial. Therefore, computa-tional fluid dynamics is used and the challenges in modeling are discussed. The extraction column design tool LLECMOD was used to compare calculated mass transfer results of the developed prototype to the experimental data.

    2. Effect of Nickel Addition on Ceria-Supported Platinum Catalysts for Medium-Temperature Shift Reaction in Fuel Processors (pages 552–558)

      A. Alijani and A. Irankhah

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200632

      Thumbnail image of graphical abstract

      A single-stage medium-temperature shift (MTS) reactor can be used in fuel processors for reducing the fuel cell volume. Supported Pt-Ni bimetallic catalysts on CeO2 were prepared to investigate their catalytic activity and selectivity under MTS reaction conditions. The operating parameters were also studied to identify the best condition range for MTS reaction.

    3. Process Variables of the Esterification Reaction of 3-Pentadecylphenol and Acryloyl Chloride Catalyzed by an Ionic Liquid (pages 559–566)

      L. Wie, X. Li, L. Yanxun, L. Tingliang and L. Guoji

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ceat.201200575

      Thumbnail image of graphical abstract

      Response surface methodology design of experiments was performed in order to optimize the esterification reaction of 3-pentadecyl-phenol and acryloyl chloride catalyzed by imidazole ionic liquid. A mathema-tical correlation between the yield of esterification and the process variables was established by employing central composite design.

    4. K-Promoted Hydrotalcites for CO2 Capture in Sorption Enhanced Reactions (pages 567–574)

      Y.-J. Wu, P. Li, J.-G. Yu, A. F. Cunha and A. E. Rodrigues

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200694

      Thumbnail image of graphical abstract

      Potassium-promoted hydrotalcite-like material was prepared with potassium nitrate as th K precursor. The stability of the material was tested and regeneration was done with thermal swing operation. The material used was found to have a very good thermal and cyclic stability, which makes it an attractive CO2 sorbent for sorption-enhanced reaction process.

    5. Preparation of a LaNiO3/γ-Al2O3 Catalyst and its Performance in Dry Reforming of Methane (pages 575–580)

      G. Moradi, H. Hemmati and M. Rahmanzadeh

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200555

      Thumbnail image of graphical abstract

      LaNiO3/γ-Al2O3 catalysts containing varying amounts of Ni were prepared by a combination of sol gel with propionic acid as solvent and an impregnation method as well as with ethanol as solvent and addition of acetic acid. Catalytic activities towards CO2 reforming of methane were tested in a fixed-bed reactor at high temperatures.

    6. Thermodynamic Analysis for Quantifying Fuel Cell Grade H2 Production by Methanol Steam Reforming (pages 581–590)

      N. Katiyar, S. Kumar and S. Kumar

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ceat.201200540

      Thumbnail image of graphical abstract

      Thermodynamic analysis of methanol steam reforming has been carried out with one traditional and two hybrid catalytic fixed-bed reactors. Under optimized conditions, the performance of the reactor with H2-selective membrane was found to be superior to the other reactor types in terms of high thermal efficiency and high % reduction of undesired products.

    7. Modeling, Simulation and Optimized Design of a Microreactor for a Two-Step Reaction (pages 591–595)

      X. Chen, H. Zeng, H. Wang and D. Zhang

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200058

      Thumbnail image of graphical abstract

      A two-step micro-reactor was designed to investigate glucose oxidation. A model was established to assess any changes in the concentrations of the reactants in the straight channels of the microreactor. The model and the optimization method can be used in the design of micro-reactors.

    8. Influence of Chitosan and Chitosan Derivatives on Hydrodynamics and Mass Transfer in a Bubble Contactor (pages 596–602)

      A. García-Abuín, D. Gómez-Díaz and J. M. Navaza

      Version of Record online: 5 MAR 2013 | DOI: 10.1002/ceat.201200502

      Thumbnail image of graphical abstract

      The influence of adding biodegradable polymers, namely chitosan and two kinds of chitosan derivatives, to the liquid phase on carbon dioxide absorption in a bubble column contactor is determined. The effects of absorption and polymer type, concentration, and physical properties of the liquid phase on hydrodynamics and mass transfer are evaluated.

    9. Liquid-Solid Mass Transfer Behavior of a New Stirred-Tank Reactor with a Packed Bed Fixed to its Wall (pages 603–610)

      M. H. Mowena, A. A. Zaatout and G. H. Sedahmed

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ceat.201200049

      Thumbnail image of graphical abstract

      A stirred tank with a packed bed of Raschig rings fixed to its wall was found to be a promising reactor type for conducting liquid-solid diffusion-controlled reactions. The liquid-solid mass transfer behavior of this innovative reactor is investigated which overcomes the limitations of common stirred-tank reactors with fluidized beds.

    10. Enhancement Factor for Gas Absorption in a Finite Liquid Layer. Part 4: Influence of Gas-Phase Mass Transfer during a Second-Order Reaction in a Liquid in Laminar Flow (pages 611–626)

      J. Yue, T. A. Nijhuis and J. C. Schouten

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200559

      Thumbnail image of graphical abstract

      Gas absorption with a second-order reaction into a finite liquid layer in laminar flow is numerically investigated. Approximate enhancement factor expressions, still not yet available, are developed for the gas-liquid co-current flow mode which can be of more general use in describing the enhance-ment factor in the case of (1, n)-th-order reactions.

    11. Separation of Ethyl Acetate-Dichloromethane-Ethanol by Extractive Distillation: Simulation and Optimization (pages 627–634)

      H. Wang, X. Cui, C. Li and J. Fang

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200310

      Thumbnail image of graphical abstract

      The separation of ethyl acetate-dichloromethane-ethanol via extractive distillation has been simulated by means of chemical process simulation software and optimized by selected appropriate process parameters. The effects of key parameters on separation efficiency are discussed and their optimization is realized by orthogonal design and response surface methodology.

    12. Numerical Simulation of Tube Erosion in a Bubbling Fluidized Bed with a Dense Tube Bundle (pages 635–644)

      Y. F. Liu and O. Hinrichsen

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200625

      Thumbnail image of graphical abstract

      One persistent problem in fluidized-bed reactors is the accelerated wastage of heat exchanger surfaces caused by erosion, affecting economics and safety of a power plant. This tube erosion process is numerically investigated in a fluidized bed with a dense tube configuration via computa-tional fluid dynamics modeling applying the Eulerian-Eulerian method.

    13. Semicontinuous Discharge of Non-Newtonian Filter Cakes in Electrofiltration (pages 645–649)

      I. Perner-Nochta, R. Rodrigues, Y. Serve and C. Posten

      Version of Record online: 5 MAR 2013 | DOI: 10.1002/ceat.201200418

      Thumbnail image of graphical abstract

      A newly developed electrofiltration method allows for quick filter cake removal without disassembling the chamber. Highly viscous filter cakes are discharged from the filtration chamber by inserting air, thus permitting a rapid restart of the process. The filtration of the model products pectin and xanthan maintained stable during several cleaning cycles.

    14. Upgrading of Simulated Syngas by Using a Nanoporous Silica Membrane Reactor (pages 650–656)

      L. Wei and K. Kawamoto

      Version of Record online: 5 MAR 2013 | DOI: 10.1002/ceat.201200595

      Thumbnail image of graphical abstract

      Upgrading of simulated syngas was investigated by using a nanoporous silica membrane reactor. Increased H2 permeability and selectivity were obtained when gas was transferred from the lumen side to the shell side. In the membrane reactor, the CO conversion broke the thermodynamic equilibrium.

    15. Effects of Distribution Channel Dimensions on Flow Distribution and Pressure Drop in a Plate-Fin Heat Exchanger (pages 657–664)

      W. Wang, S. Zhang, J. Yang, J. Zheng, X. Ding, M. Chou, P. Tang and X. Zhan

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200584

      Thumbnail image of graphical abstract

      Flow distribution and pressure drop characteristics in a plate-fin heat exchanger are studied for the first time. Based on the effects of distribution channel dimensions, a new strategy for improving the performance of the heat exchanger is proposed. A performance effectiveness factor was developed for predicting the effect of the proposed approach.

    16. Amoxicillin and Ethyl Cellulose Precipitation by Two Supercritical Antisolvent Processes (pages 665–672)

      A. Montes, A. Nunes, M. D. Gordillo, C. Pereyra, C. M. M. Duarte and E. J. Martínez de la Ossa

      Version of Record online: 5 MAR 2013 | DOI: 10.1002/ceat.201200429

      Thumbnail image of graphical abstract

      Composites of amoxicillin and ethyl cellulose in the micrometer range were precipitated by supercritical antisolvent (SAS) processes. The morphologies and mean diameter ranges of the precipitates and the amoxicillin contents in the final products were analyzed. The SAS processes used differ mainly in the way in which the solutions are introduced: through a normal or a coaxial nozzle.

    17. Controlled Experimental Study on Removing Diesel Oil Spillages Using Agricultural Waste Products (pages 673–680)

      M.-M. Li, H.-C. Pan, S.-L. Huang and M. Scholz

      Version of Record online: 5 MAR 2013 | DOI: 10.1002/ceat.201200658

      Thumbnail image of graphical abstract

      Oil spillages need to be removed quickly and cost-effectively by sustainable methods. One of the most effective techniques is sorption by natural organic sorbents. Here, the oil sorption capacity and floating performance properties of three common wastes from the agriculture and forestry industries are assessed.

    18. Diffusion of Saccharides and Sugar Alcohol Sorbitol in Chitosan Membranes and Beads (pages 681–686)

      T. Waluga and S. Scholl

      Version of Record online: 5 MAR 2013 | DOI: 10.1002/ceat.201200522

      Thumbnail image of graphical abstract

      Diffusion coefficients of different sugars and sorbitol were determined by mass transfer through a flat membrane in a diffusion cell and by effusion experiments with beads. The membrane technique provided more accurate results and better reproduci-bility. The effects of molecular size, structure, and temperature on transport properties are discussed in detail.

    19. Using Tomography to Characterize the Mixing of Non-Newtonian Fluids with a Maxblend Impeller (pages 687–695)

      D. Patel, F. Ein-Mozaffari and M. Mehrvar

      Version of Record online: 5 MAR 2013 | DOI: 10.1002/ceat.201200425

      Thumbnail image of graphical abstract

      Mixing of non-Newtonian fluids with yield stress in a stirred vessel was evaluated by electrical resistance tomography. The mixing performance of different impellers was determined via mixing time and specific power consumption. A Maxblend impeller was found to be most efficient in terms of uniform mixing in a shorter time and with lower power input.

  7. Communication

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Overview
    1. Pilot Test on the Removal of Coke Powder from Quench Oil Using a Hydrocyclone (pages 696–702)

      L. Ma, Q. Yang, Y. Huang, P. Qian and J.-G. Wang

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/ceat.201200316

      Thumbnail image of graphical abstract

      An appropriate method for removing coke powder from quench oil by a specifically designed hydrocyclone is presented. The pilot test proves its efficiency, safety, stability, and economics. Excellent separation efficiency is achieved under optimized operating conditions. The separation is successful in stable, long-period operations without complications.

  8. Overview

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

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