Chemical Engineering & Technology

Cover image for Vol. 30 Issue 6

Special Issue: Hight Pressure Technology

June, 2007

Volume 30, Issue 6

Pages 671–801

Issue edited by: Wolfgang Arlt

  1. Cover Picture

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

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Overview Contents: Chem. Eng. Technol. 6/2007 (pages 671–672)

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200790022

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Contents: Chem. Eng. Technol. 6/2007 (pages 673–677)

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200790023

  4. Editorial

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Editorial: Chem. Eng. Technol. 6/2007 (page 679)

      Wolfgang Arlt

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200790024

  5. Forum

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Forum: Chem. Eng. Technol. 6/2007 (pages 681–682)

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200790025

  6. Scientific Highlights

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

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Supercritical Fluids and Applications – A Patent Review (pages 685–688)

      E. Schütz

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600297

      The view on the patent landscape for the application of supercritical fluids shows that the field is growing even stronger. The large number of independent patents requires the use of specialized databanks for keeping an overview. Regional and branch statistics of the last 25 years are shown.

    2. Density Measurements of Fluids and Their Mixtures at High Pressure (pages 689–694)

      A. M. F. Palavra, M. A. Tavares Cardoso, J. A. P. Coelho and M. F. B. Mourato

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200700040

      The principles of the isochoric method are described. Density measurements of fluids and their mixtures at high pressure using the isochoric method are discussed, namely in the high temperatures range where the possibility of thermal degradation affects their accuracy.

  8. Research Articles

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Pressure Relief of High Pressure Devices (pages 695–701)

      G. Luft, J. Broedermann and T. Scheele

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600270

      The effective discharge area of relief valves and rupture discs is calculated using national and international codes. From laboratory experiments and comparison with industrial relief valves, it is demonstrated that these methods can also be applied at high pressures to protect plants against overpressure.

    2. Distillation under High Pressure: A Behavioral Study of Packings (pages 702–708)

      M. Assaoui, B. Benadda and M. Otterbein

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600173

      The effect of pressure on the hydrodynamics and the efficiency in a packed column in distillation is investigated. The results obtained confirm the variation of the pressure drops according to vapor flowrates observed with atmospheric pressure. The maximum capacity increases with the pressure.

    3. Solid Bed Properties under High Gas Pressure (pages 709–714)

      S. Voges, P. Jaeger and R. Eggers

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200700036

      Several solid bed properties of compressible materials are examined with respect to their impact on batch and continuous processes using dense gases. Important properties in this context are, amongst others, compressibility and permeability.

    4. Numerical Simulation of Heat and Mass Transfers in a Supercritical Dissolution Column (pages 715–720)

      Z. Souiy, A. Ben Moussa and H. Ksibi

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600371

      In order to obtain a homogenous supercritical solution, a numerical simulation based on energy and mass balances inside a column packed with small glass balls and crossed by CO2 at high pressure, is presented. This facilitates the analysis of the influence of temperature and CO2 velocity on the extraction rate.

    5. First Catalytic Hydroaminomethylation in Supercritical Ammonia (pages 721–725)

      H. Klein, R. Jackstell, M. Kant, A. Martin and M. Beller

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600321

      For the first time, catalytic hydroaminomethylations with ammonia under supercritical conditions are presented. The influence of different reaction parameters has been investigated in detail and an unprecedented yield of primary amines has been achieved for 1-octene which served as an example of higher olefins.

    6. Direct Synthesis of Linalyl Acetate from Linalool in Supercritical Carbon Dioxide: A Thermodynamic Study (pages 726–731)

      Á. Martín, V. Silva, L. Pérez, J. García-Serna and M. J. Cocero

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600407

      A promising process for the synthesis of linalyl acetate by catalytic transformation of essential oils in supercritical carbon dioxide is presented. A comprehensive thermodynamic study of the optimum conditions for the reaction and the separation of the products is included.

    7. A Supercritical Fluid-Assisted, Integrated Process for By-Products from Fat and Lipid Production (pages 732–736)

      A. Weber, E.-H. Lee, S.-K. Shin and B.-S. Chun

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200700002

      An integrated process for the enzymatic alcoholysis of lipids and the separation of the products by supercritical fluid extraction has been designed and tested. The reaction conditions have been optimized to match a fractionated separation by a cascade of three separators. The fractions were analyzed by HPLC for their content of fatty acid esters, and different acylglycerides.

    8. Concentration of Wax-like Alcohol Ethoxylates with Supercritical Propane (pages 737–741)

      C. E. Schwarz, I. Nieuwoudt and J. H. Knoetze

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600383

      The use of supercritical propane to fractionate alcohol ethoxyl-ates according to the number of ethyl-ene oxide units in the molecule was investigated. Pilot plant tests confirmed that fractionation is technically possible and an initial estimate of the operating costs shows that the process is also economically viable.

    9. Control of the Molecular Weight Distribution of Petroleum Pitches via Dense-Gas Extraction (pages 742–748)

      E. G. Cervo and M. C. Thies

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200700024

      Dense-gas extraction of Marathon's M-50 isotropic petroleum pitch was carried out countercurrently with the solvent toluene in a packed column under both isothermal and temperature-gradient conditions. Of particular interest was the effect of column temperature and pressure on the fractionation of the feed pitch.

    10. Hydrothermal Biomass Gasification – Effects of Salts, Backmixing and Their Interaction (pages 749–754)

      A. Kruse and M. Faquir

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600409

      Hydrothermal biomass gasification is a promising method to produce hydrogen from biomass residues with high water content. Process optimization requires a clear understanding of the reaction pathways and chemical kinetics. Both are strongly influenced by the addition of alkali salts or by the natural ingredients of biomass.

  9. Communication

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. The Effect of a New Pressure Change Technology (PCT) on Microorganisms: An Innovate Concept for Food Safety (pages 755–757)

      K. Bönsch, M. Wecks, J. Ondruschka and R. Staudt

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600402

      A new pressure change technology for inactivation of microorganisms in liquid food and pharmaceuticals is described. The influence of process parameters was investigated with the help of physiological changes of food-relevant microorganisms.

  10. Research Articles

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Model Assessment for the Prediction of Mass Transfer Coefficients in Liquid-Liquid Extraction Columns (pages 758–763)

      N. Outili, A.-H. Meniai, G. Gneist and H.-J. Bart

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600356

      Accurate determi-nation of the overall mass transfer coefficient depends upon the choice of the combination of theories for calculation of individual mass transfer coefficients. Different combinations for the calculation of the overall mass transfer coefficient have been tested for the Acetone/Toluene/Water system, which is characterized by relatively large drop sizes.

    2. Kinetic Modeling of Phenol Hydroxylation for a Simulated Prognosis of Its Continuous Operation (pages 764–773)

      G. Schulz-Ekloff, G. Thiele, D. Brunßen, E. Koch and L. Alvarez

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600376

      Phenol hydroxylation to dihydroxybenzenes as an example of the class of partial oxidation reactions with hydrogen peroxide is studied by comparing discontinuous and quasi-continuous operations. A process model is developed from an experimental analysis of reaction.

    3. Kinetics of Solvent Extraction of Copper(II) by Bis-(2,4,4-Trimethylpentyl)Phosphonic Acid using a Single Drop Technique (pages 774–781)

      R. K. Biswas, M. R. Ali, A. K. Karmakar and M. Kamruzzaman

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600284

      The kinetics of the forward and backward extractions of copper(II) by the bis-(2, 4, 4-Trimethylpentyl)phosphonic acid process are investigated using the single drop technique and flux (F)-method of data treatment.

      Corrected by:

      Erratum: Kinetics of Solvent Extraction of Copper(II) by Bis-(2,4,4-Trimethylpentyl)Phosphonic Acid using a Single Drop Technique

      Vol. 30, Issue 9, 1165, Article first published online: 27 AUG 2007

    4. Investigation of Soot Formation During Partial Oxidation of Diesel Fuel (pages 782–789)

      K. Roth, S. Wirtz, V. Scherer and W. Nastoll

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600399

      A detailed kinetic model describing soot formation and oxidation of hydrocarbon fuels under the conditions of partial oxidation was enhanced and validated. Experimental data required for validation are described in detail and compared to kinetic calculations.

    5. Experimental and Numerical Studies of Fe2O3 Particle Formation Processes in a Flat Flame Burner (pages 790–796)

      M. Beck, S. Wirtz and V. Scherer

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600393

      Fe2O3 particles form during thermal decomposition of an iron chloride solution in so-called spray roasting reactors. The main objective is to develop a model capable of numerically simulating the main formation stages of the roasting process for a large number of particles in an acceptable calculation time.

  11. Communication

    1. Top of page
    2. Cover Picture
    3. Overview
    4. Contents
    5. Editorial
    6. Forum
    7. Scientific Highlights
    8. Reviews
    9. Research Articles
    10. Communication
    11. Research Articles
    12. Communication
    1. Mass Transfer Around a Spheroid Buried in Granular Beds of Small Inert Particles and Exposed to Fluid Flow (pages 797–801)

      J. M. P. Q. Delgado

      Article first published online: 30 MAY 2007 | DOI: 10.1002/ceat.200600329

      A general solution of the problem of mass transfer between a single prolate spheroid buried in a porous media and exposed to fluid flow is theoretically studied for convection with molecular diffusion. Analytical steady-state solutions for limiting cases are obtained.

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