Chemical Engineering & Technology

Cover image for Vol. 30 Issue 5

May, 2007

Volume 30, Issue 5

Pages 547–666

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
  2. Overview

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
  3. Contents

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
  4. Forum

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
  5. Scientific Highlights

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
  6. Reviews

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
    1. Novel Process Options for Application of Zeolites in Supercritical Fluids and Ionic Liquids (pages 557–568)

      R. Gläser

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200700004

      Besides their well-established role as catalysts in the refining and petrochemical industries, zeolites open up new fields of application, especially in the synthesis and processing of fine and specialty chemicals. It is for these developments that the demand for alternative, innovative and tailored solvent systems will increase.

    2. Catalytic Transformations for Production of Fine Chemicals and Pharmaceuticals from Wood-Derived Raw Materials (pages 569–576)

      D. Y. Murzin, P. Mäki-Arvela, T. Salmi and B. Holmbom

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600299

      Wood is a valuable raw material for the production of fine chemicals. However, since wood extractives cannot be used directly, their chemical transformation is required. Several catalytic processes for the utilization of fatty acids, phytosterols and lignans as raw materials for the production of chemicals are reported.

  7. Research Articles

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
    1. Preparation and Characterization of Bi3+-TiO2 and its Photocatalytic Activity (pages 577–582)

      H. Zuo, J. Sun, K. Deng, R. Su, F. Wei and D. Wang

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200700022

      Bi3+-TiO2 photocata-lysts are prepared by doping bismuth ion into the TiO2 structure in a sol-gel process. Rodamine-B (RhB) and p-nitrobenzonic acid (pNBA) are used as model chemicals. GC-MS results show that pNBA can be effectively degraded to small molecules, such as quinone, acetic acid and formic acid.

    2. Phenol Removal through Chemical Oxidation using Fenton Reagent (pages 583–586)

      Y. Yavuz, A. Savas Koparal and Ü. Bakir Ögütveren

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600377

      Using Fenton reagent, it was found that phenol, aromatic and non-biodegradable organic matter were removed from a model solution, through the process of chemical oxidation. High phenol removal and relatively lower COD (Chemical Oxygen Demand) removals were obtained.

    3. Micro-Scale Modeling of a Functionally Graded Ni-YSZ Anode (pages 587–592)

      M. Ni, M. K. H. Leung and D. Y. C. Leung

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600385

      A mathematical model is developed to investigate the coupled transport and electrochemical reactions in a nickel-yttrial-stablized zirconia (Ni-YSZ) anode for use in solid oxide fuel cells (SOFCs). It was found that the particle size graded SOFC anode showed the best performance.

    4. Creeping Film Models for Rotating Channels (pages 593–600)

      E. Mondt, B. Brouwers and E. van Kemenade

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200700005

      A theoretical analysis is presented for the development of a liquid film at the walls of vertically placed centrifugal separators. Solutions are presented for situations with a small liquid load in which the liquid droplets flow co-currently and counter-currently with the gas flow.

    5. Heat Conveyance Mechanism and Applications (pages 601–605)

      S.-T. Kong, Q.-W. Dong, M.-S. Liu and Q. Zhu

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600182

      The application of heat conveyance is presented under the assumption of low velocity and viscosity, and the factors affecting heat transfer are analyzed. The analyses indicate that the length of the twisted-tape insert leads to a wide range of performance. The application of heat conveyance could guide the design of new enhanced heat transfer structures.

    6. Using CFD and Ultrasonic velocimetry to Study the Mixing of Pseudoplastic Fluids with a Helical Ribbon Impeller (pages 606–614)

      I. Ihejirika and F. Ein-Mozaffari

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200700006

      The performance of a helical ribbon impeller in mixing a yield stress fluid is determined from flow field calculations and tracer homogenization simulations. Efficiency studies show that the upward pumping mode of the impeller is preferred for such applications.

    7. Finite Volume Simulation of High Speed Combustion of Premixed Air-Acetylene Mixtures in a Microchannel (pages 615–620)

      A. Chaudhuri, C. Guha and T. K. Dutta

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600389

      The effects of channel aspect ratio and wall temperature on high speed microcombustion have been studied. The increase in wall temperature due to wall friction in reduced dimensions initiates the chemical reaction of the combustible mixture near the wall region, and the reacted zone reaches the centerline for smaller height-to-length ratios of the microchannels.

    8. A New Process for Synthesis of γ-Butyrolactone and Cyclohexanone (pages 621–627)

      H.-Y. Zheng, Y.-L. Zhu, L. Huang, H.-W. Xiang and Y.-W. Li

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200700042

      A useful coupling process of the hydrogenation of maleic anhydride to γ-butyrolactone and the dehydrogenation of cyclohexanol to cyclohexanone over a stable Cu-based catalyst has been developed from an atom-economic perspective. The possibility of the coupling process has been investigated thermodynamically.

    9. Effect of CaSO4 Pelletization Conditions on a Novel Process for Converting SO2 to Elemental Sulfur by Reaction Cycles involving CaSO4/CaS – Part I. CaSO4 Pellet Strength and Reducibility by Hydrogen (pages 628–634)

      M. Eob Choi, H. Y. Sohn, Y. M. Z. Ahmed, F. M. Mohamed, G. Han and M. E. H. Shalabi

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200700046

      Sulfur dioxide is converted to elemental sulfur which has two significant implications: It fixes a potential pollutant as a solid that is much more stable and easy to transport than sulfuric acid that is the byproduct of the current fixation process. The resulting sulfur is itself a useful material for the manufacture of many chemicals.

    10. Adsorption of SO2 on Activated Carbon for Low Gas Concentrations (pages 635–641)

      P. Zhang, H. Wanko and J. Ulrich

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600360

      Adsorption experi-ments of SO2 on activated carbon has been carried out for low concentrations at room temperature under different conditions such as temperature, relative humidity, and concentration. The dynamic behavior under circular change of the gas pollutant concentration, which is a typical situation for interior air filters, was also studied.

    11. Degradation of Chlorocarbons Driven by Hydrodynamic Cavitation (pages 642–648)

      Z.-L. Wu, B. Ondruschka and P. Bräutigam

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600288

      The degradation kinetics of chlorocarbons is measured to provide an efficient lab-scale device for the degradation of organic pollutants driven by hydrodynamic cavitation. The chemical mechanism and the reaction kinetics of the degradation by hydrodynamic cavitation are consistent with acoustic cavitation.

    12. Agricultural Waste Conversion to Activated Carbon by Chemical Activation with Phosphoric Acid (pages 649–654)

      M. Soleimani and T. Kaghazchi

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600325

      The production of activated carbon by chemical activation of agricultural wastes such as bagasse, hard shells of apricot stones, almond, walnut and hazelnut shells is investi-gated. Activated carbon from the hard shells of apricot stones has the best adsorption properties and the highest surface area.

  8. Communications

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Forum
    6. Scientific Highlights
    7. Reviews
    8. Research Articles
    9. Communications
    1. Bed Expansion – Extending Correlations for Fluidized Beds with Inserts to Open Fluidized Beds (pages 655–658)

      M. C. Leaper and N. Hilal

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600403

      Bed expansion occurs during the operation of gas-fluidized beds and has a significant bearing on heat and mass transfer phenomena within the bed. This paper builds on previous work on the expansion behavior of fluidized beds with vertical inserts and extends previously developed experimental correlations to applicability to open fluidized beds.

    2. Practical Assessment of Electronic Water Treatment for the Prevention of Fouling (pages 659–662)

      S. W.H. Van Hulle, A. Vergote, J. Hogie and P. Dejans

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600398

      Many anti-fouling techniques exist, both chemically and non-chemically. The efficiency of non-chemical methods is still controversial, although the use of these devices is already widespread in industry. A case study is presented in which the operation of such a device is demonstrated.

    3. Dry SO2 Removal Process Using Calcium/Siliceous-Based Sorbents: Deactivation Kinetics Based on Breakthrough Curves (pages 663–666)

      I. Dahlan, A. R. Mohamed, A. H. Kamaruddin and K. T. Lee

      Version of Record online: 24 APR 2007 | DOI: 10.1002/ceat.200600336

      The removal of sulfur dioxide from simulated flue gas was investigated in a laboratory-scale stainless steel fixed-bed reactor using sorbents prepared from various siliceous materials. Analysis of this sorbent deactivation is one of the important steps in the design and evaluation of fixed-bed reactor performance under dry-type desulfurization processes.

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