Chemical Engineering & Technology

Cover image for Vol. 38 Issue 5

May, 2015

Volume 38, Issue 5

Pages 745–955

  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. Research Article
    10. Overview
    1. Cover Chem. Eng. Technol. 5/2015 (page 745)

      Article first published online: 24 APR 2015 | DOI: 10.1002/ceat.201590020

  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. Research Article
    10. Overview
    1. Editorial Board Chem. Eng. Technol. 5/2015 (page 746)

      Article first published online: 24 APR 2015 | DOI: 10.1002/ceat.201590021

  3. Overview

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Research Article
    10. Overview
    1. Overview Contents: Chem. Eng. Technol. 5/2015 (page 747)

      Article first published online: 24 APR 2015 | DOI: 10.1002/ceat.201590022

  4. Contents

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Research Article
    10. Overview
    1. Contents: Chem. Eng. Technol. 5/2015 (pages 748–754)

      Article first published online: 24 APR 2015 | DOI: 10.1002/ceat.201590023

  5. Highlights

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Research Article
    10. Overview
    1. Highlights: Chem. Eng. Technol. 5/2015 (pages 756–757)

      Article first published online: 24 APR 2015 | DOI: 10.1002/ceat.201590024

  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. Research Article
    10. Overview
    1. Mathematical Modeling of a Simulated Moving-Bed Adsorption Process: Parex Technology as a Case Study (pages 759–768)

      Mahdi Rezazadeh, Mohammad Seifi Esfahani, Amir Rahimi and Mohammad Reza Ehsani

      Article first published online: 14 APR 2015 | DOI: 10.1002/ceat.201400430

      Thumbnail image of graphical abstract

      A simple but efficient mathematical model is proposed for performance evaluation of a simulated moving-bed adsorption unit. The proposed model is capable for analyzing the adsorption unit with acceptable accuracy and a lower central processing unit time. It can contribute to the optimization of operating conditions, trouble shooting, and enhancement of productivity.

    2. Extraction of Spent Bleaching Earth in the Production of Renewable Diesel (pages 769–776)

      Vilppu Kuuluvainen, Päivi Mäki-Arvela, Kari Eränen, Anton Holappa, Jarl Hemming, Heidi Österholm, Blanka Toukoniitty and Dmitry Y. Murzin

      Article first published online: 14 APR 2015 | DOI: 10.1002/ceat.201500052

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      In the production of renewable diesel the feedstock is subjected to bleaching to remove undesired or harmful by-products. Oil extraction from acidic and nonacidic spent bleaching earths was investigated. The quality of the extracted oil was found to be similar to that of the bleached oil, especially considering the glyceride composition. The yields of oil were independent of the feedstock.

    3. Numerical Simulation of Interfacial Closures for 3D Bubble Column Flows (pages 777–786)

      Rao M. A. Masood, Vojislav Jovicic and Antonio Delgado

      Article first published online: 14 APR 2015 | DOI: 10.1002/ceat.201400182

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      Developing and improving computational fluid dynamics (CFD) tools for modeling of bubble column flows is of increasing interest. Numerical investigations of gas-liquid flow hydrodynamics in 3D square bubble columns were performed by means of a commercial CFD tool. The effect of the drag coefficient was determined and results were also compared to drag force models.

    4. Extension of the Rapid Design Algorithm for Twisted-Tube Evaporative Fluid Coolers (pages 787–796)

      Mohammad R. Jafari Nasr and Shima Jafarifar

      Article first published online: 14 APR 2015 | DOI: 10.1002/ceat.201400399

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      The application of twisted instead of plain tubes is a promising approach to increase the thermal efficiency of evaporative fluid coolers. Thermal and hydraulic analyses were performed by conventional methods and compared with an innovative rapid design algorithm. The latter minimizes the required heat transfer area, indicating a significant reduction of capital costs of such coolers.

    5. Kinetics of Sulfite Oxidation in the Simultaneous Desulfurization and Denitrification of the Oxidation-Absorption Process (pages 797–803)

      Xianming Huang, Jie Ding, Yong Jia, Shule Zhang and Qin Zhong

      Article first published online: 14 APR 2015 | DOI: 10.1002/ceat.201300590

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      A model was established to describe the oxidation behavior of sulfite in mixed sulfite and nitrite solutions. The overall transfer rate of oxygen from the gas phase to the liquid phase is equal to the overall oxidation rate of sulfite and nitrite. The oxidation of nitrite consumes part of the oxygen. The established model is in good agreement with the experimental results.

    6. Combination of Reaction and Separation in Heterogeneous Catalytic Hydrogenation of Ethylformate (pages 804–812)

      Gerson Martin, Carla Pereira, Frank Pettersson, Henrik Saxén, Dmitry Y. Murzin, Alírio Rodrigues and Tapio Salmi

      Article first published online: 7 APR 2015 | DOI: 10.1002/ceat.201400649

      Thumbnail image of graphical abstract

      An integrated concept for the production of optically active chemicals by heterogeneous asymmetric catalysis and chromatographic separation was developed. Feasibility to conduct continuous heterogeneous catalytic enantioselective hydrogenation of ethylbenzoyl formate in the same solvent as considered optimal for chromatographic separation of the products is demonstrated.

    7. Strategy for a Scale-up Correlation in a Dissolved Air Flotation Chamber (pages 813–818)

      Robson de Souza Vasconcelos, Rosangela Cristine da S. Henauth, Alex Elton de Moura, Valdemir Alexandre dos Santos and Leonie Asfora Sarubbo

      Article first published online: 19 MAR 2015 | DOI: 10.1002/ceat.201400665

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      A simple strategy is described to reduce future risks in scale-up investments by using similarity correlations based on the most important gravitational and inertial forces in a dissolved air flotation (DAF) chamber in a lab-scale model. This scale-up strategy allows for designing a pilot DAF based on the laboratory model, requiring relatively inexpensive material.

    8. Effect of Gravity on the Hydrodynamics in an Unbaffled Stirred Vessel (pages 819–826)

      Feng L. Yang and Shen J. Zhou

      Article first published online: 1 APR 2015 | DOI: 10.1002/ceat.201400223

      Thumbnail image of graphical abstract

      Gravity plays an important role in vortex formation in unbaffled stirred vessels. Its effect on the hydrodynamics in such vessels was evaluated by computational fluid dynamics. Laminar and turbulent flow regimes and liquids with high and low viscosity were simulated. Numerical predictions were compared with experimental results from literature.

    9. Generation and Deposition of Organic Nanoparticles in a Liquid Ring Pump (pages 827–834)

      Claudia Brunn, Sokratis Sinanis, Susanne Mall-Gleissle and Karlheinz Schaber

      Article first published online: 2 APR 2015 | DOI: 10.1002/ceat.201400353

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      If a gas-vapor mixture is compressed in a liquid ring vacuum pump, the gas phase may become supersaturated with respect to the vapor and aerosol formation may occur. This principle was used for the production of nanosuspensions of insoluble organic substances with particle sizes of 50–300 nm. The foam formed in the gas-liquid separator showed stable structures due to incorporated solid nanoparticles.

    10. Response Surface Optimization of Biodiesel Production via Catalytic Transesterification of Fatty Acids (pages 835–834)

      Maliheh Mir and Seyyed M. Ghoreishi

      Article first published online: 11 MAR 2015 | DOI: 10.1002/ceat.201300328

      Thumbnail image of graphical abstract

      A system composed of a supercritical CO2 extractor and a stirred-batch reactor was developed for biodiesel production from Jatropha seeds oil by alkali catalytic transesterification and acidic catalytic esterification reactions. Different response surface methodology models were proposed to predict yields of fatty acid methyl esters and biodiesel as a function of operating variables.

    11. Effects of Electrospinning Parameters on Gelatin/Poly(ϵ-Caprolactone) Nanofiber Diameter (pages 844–850)

      Seza Özge Gönen, Melek Erol Taygun and Sadriye Küçükbayrak

      Article first published online: 27 MAR 2015 | DOI: 10.1002/ceat.201400323

      Thumbnail image of graphical abstract

      In order to use the electrospinning process as a tool for producing materials with targeted fiber diameter for different applications, a simple method was developed for predicting the diameter of electrospun fibers. Validation experiments verified the accuracy of the model which offers an efficient method for fabricating nanofibers with a controllable and predictable fiber diameter.

    12. Effect of pH on Aerobic Granulation and Treatment Performance in Sequencing Batch Reactors (pages 851–858)

      Samira Rezasoltani, Jalal Shayegan and Sajjad Jalali

      Article first published online: 7 APR 2015 | DOI: 10.1002/ceat.201400400

      Thumbnail image of graphical abstract

      Adjusting the pH of granular bioreactors has a great impact on aerobic granulation. Lowering the pH in the early stage of operation followed by a gradual increase helps in rapid formation and high strength of granules. The results are valuable for the development of full-scale aerobic granular bioreactors for wastewater treatment with rapid reactor start-up and good system stability.

    13. Polycation-Grafted Poly(vinylidene fluoride) Membrane with Biofouling Resistance (pages 859–866)

      Xiang Shen, Yiping Zhao and Li Chen

      Article first published online: 7 APR 2015 | DOI: 10.1002/ceat.201400582

      Thumbnail image of graphical abstract

      Biofouling is a major obstacle for ensuring long-term effectiveness of a membrane process. A strategy is proposed to construct an antibacterial poly(vinylidene fluoride) membrane surface by covalent immobilization of cations. The polycation membrane surface exhibited an excellent antibacterial activity. Irreversible fouling was converted into reversible fouling.

    14. Techno-Economic Comparison of a 7-MWth Biomass Chemical Looping Gasification Unit with Conventional Systems (pages 867–878)

      Milad Aghabararnejad, Gregory S. Patience and Jamal Chaouki

      Article first published online: 8 APR 2015 | DOI: 10.1002/ceat.201400503

      Thumbnail image of graphical abstract

      Chemical looping is an alternative method to supply conventional gasification (CG) systems with the required oxygen. As biomass gasification scenarios to produce high-concentrated syngas, CG units working with air or pure oxygen are compared techno-economically to chemical looping gasification. The latter approach is found to be a reasonable substitute for GC with oxygen.

    15. Experimental Investigation and Simulation of Organophilic Pervaporation in Laboratory and Pilot Scale (pages 879–890)

      Patrick Schiffmann and Jens-Uwe Repke

      Article first published online: 8 APR 2015 | DOI: 10.1002/ceat.201400485

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      Only few modeling tools for the pervaporation process are available. A three-step modeling approach for simulation of industrial-scale pervaporation modules is described. The models are based on the design of a newly developed membrane module. Performance data of a hydrophobic membrane are identified in laboratory-scale experiments. Simulations of an industrial-scale membrane module are compared to experiments in pilot scale.

    16. CO2 Adsorption Kinetics of K2CO3/Activated Carbon for Low-Concentration CO2 Removal from Confined Spaces (pages 891–899)

      Yafei Guo, Chuanwen Zhao and Changhai Li

      Article first published online: 1 APR 2015 | DOI: 10.1002/ceat.201400383

      Thumbnail image of graphical abstract

      K2CO3 supported on activated carbon could be confirmed as a promising means for removal of low-concentration CO2 in confined spaces. CO2 adsorption kinetic characteristics of the sorbent are investigated and the physically adsorbed CO2 is quantified by an empirical prediction equation.

    17. Multi-Objective Optimization of Pseudo-Dynamic Operation of Naphtha Pyrolysis by a Surrogate Model (pages 900–906)

      Yangkun Jin, Jinlong Li, Wenli Du and Feng Qian

      Article first published online: 2 APR 2015 | DOI: 10.1002/ceat.201400162

      Thumbnail image of graphical abstract

      The ethylene cracking furnace is a key unit in the petrochemical industry, but to date its pseudo-dynamic optimization combined with mathematic programming multi-objectives has not yet been reported. A simple and fast pseudo-dynamic surrogate model is proposed to replace the complex and high-load computational free radical mechanism-based simulator.

    18. Distillation Control Structure Selection for Energy-Efficient Operations (pages 907–916)

      Funmilayo Osuolale and Jie Zhang

      Article first published online: 8 APR 2015 | DOI: 10.1002/ceat.201400707

      Thumbnail image of graphical abstract

      As distillation is widely used as separation process in chemical and petrochemical industries, a method for energy-efficient control structure selection using a relative exergy array is presented. The preferred control structure should have both appropriate operability and good energy efficiency. The proposed method is demonstrated on two binary distillation columns.

    19. Effect of Catalyst, Temperature, and Hydrogen Pressure on Slurry Hydrocracking Reactions of Naphthalene (pages 917–930)

      Solmaz Akmaz and Pegah Amiri Caglayan

      Article first published online: 9 APR 2015 | DOI: 10.1002/ceat.201400300

      Thumbnail image of graphical abstract

      Slurry-phase hydrocracking applications affecting heteroatoms, olefinic and aromatic structures in heavy oil recently have gained importance. Slurry hydrocracking reactions of naphthalene as an aromatic model compound were performed in the presence of solid heterogeneous catalyst compositions. Disposable and low-cost Fe-containing catalyst compositions with sulfur provided satisfying results.

    20. Statistical Optimization for Production of Light Olefins in a Fluidized-Bed Reactor (pages 931–940)

      Hassan Sharifi Pajaie and Majid Taghizadeh

      Article first published online: 9 APR 2015 | DOI: 10.1002/ceat.201400681

      Thumbnail image of graphical abstract

      The catalytic methanol-to-olefins (MTO) reaction is an alternative to the thermal cracking process for production of olefins. Mesoporous nanocrystalline silicoaluminophosphate was prepared hydrothermally by ultrasonic and microwave-assisted aging processes. The main parameters influencing the catalyst performance in a fluidized-bed reactor were optimized by the Box-Behnken method.

  7. Communication

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Research Article
    10. Overview
    1. Fast Measurements of the Gas-Liquid Diffusion Coefficient in the Gaussian Wake of a Spherical Bubble (pages 941–946)

      Nicolas Dietrich, Jessica Francois, Mélanie Jimenez, Arnaud Cockx, Pascal Guiraud and Gilles Hébrard

      Article first published online: 27 MAR 2015 | DOI: 10.1002/ceat.201400471

      Thumbnail image of graphical abstract

      Since literature data on mass diffusion coefficients are actually not sufficient, a fast method is proposed to obtain oxygen diffusion coefficients from measuring the fluorescence quenching behind a bubble. Planar laser-induced fluorescence with inhibition presents a non-intrusive alternative method to accurately evaluate the gas-liquid diffusivity in a very short time.

  8. Research Article

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Research Article
    10. Overview
    1. Drying of Iron Chloride Solutions: Laser Heating of Levitated Single Particles (pages 947–951)

      Martin Schiemann, Sebastian Baer, Cemal Esen and Andreas Ostendorf

      Article first published online: 8 APR 2015 | DOI: 10.1002/ceat.201400594

      Thumbnail image of graphical abstract

      To get deeper insight into the particle formation process from aqueous iron chloride solutions, experiments were performed with single droplets in an acoustic levitator. A CO2 laser served as heat source for drying. Varying FeCl2 concentrations and laser power allowed for generating particles with different shapes. Time scales and particle size evolution were compared to literature data.

  9. Overview

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Highlights
    7. Research Articles
    8. Communication
    9. Research Article
    10. Overview
    1. You have free access to this content
      Overview Contents: Chemie Ingenieur Technik 5/2015 (page 955)

      Article first published online: 24 APR 2015 | DOI: 10.1002/ceat.201590025

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