Chemical Engineering & Technology

Cover image for Vol. 37 Issue 1

January, 2014

Volume 37, Issue 1

Pages 3–172

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Highlights
    8. Review
    9. Research Articles
    10. Communication
    1. You have free access to this content
      Cover Chem. Eng. Technol. 1/2014

      Version of Record online: 19 DEC 2013 | DOI: 10.1002/ceat.201390069

  2. Editorial Board

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Highlights
    8. Review
    9. Research Articles
    10. Communication
    1. Editorial Board Chem. Eng. Technol. 1/2014

      Version of Record online: 19 DEC 2013 | DOI: 10.1002/ceat.201390071

  3. Overview

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

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Highlights
    8. Review
    9. Research Articles
    10. Communication
    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. Highlights
    8. Review
    9. Research Articles
    10. Communication
    1. You have free access to this content
      Happy New Year CET (page 11)

      Barbara Böck

      Version of Record online: 19 DEC 2013 | DOI: 10.1002/ceat.201390068

  6. Highlights

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

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Highlights
    8. Review
    9. Research Articles
    10. Communication
    1. Sulfation Rates of Particles in Calcium Looping Reactors (pages 15–19)

      Mónica Alonso, José M. Cordero, Borja Arias and Juan C. Abanades

      Version of Record online: 6 DEC 2013 | DOI: 10.1002/ceat.201200614

      Thumbnail image of graphical abstract

      Calcium looping reactors proved to be extremely efficient in SO2 capture. The number of carbonation/calcination cycles evolved as a new important variable to understand sulfation phenomena because of its strong impact on the pore size distribution of CaO particles. The sulfation patterns become more homogeneous with increasing number of cycles.

  8. Research Articles

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Highlights
    8. Review
    9. Research Articles
    10. Communication
    1. Agglomerate Sizes of Binary Nanoparticle Mixtures in a Vibro-Fluidized Bed (pages 20–26)

      Xizhen Liang, Hao Duan, Jian Wang and Tao Zhou

      Version of Record online: 3 DEC 2013 | DOI: 10.1002/ceat.201300483

      Thumbnail image of graphical abstract

      Fluidization behavior of nanoparticles is greatly affected by agglomerate size. Introduction of vibration energy for binary nanoparticles reduced agglomerate sizes and significantly improved fluidization quality. The mean agglomerate sizes were predicted by the Richardson-Zaki equation combined with Stokes' law and agreed well with those determined experimentally in the vibrated fluidization bed.

    2. Numerical Study of the Collision and Coalescence of Water Droplets in an Electric Field (pages 27–35)

      Mehdi Mohammadi, Shahrokh Shahhosseini and Mahmoud Bayat

      Version of Record online: 15 NOV 2013 | DOI: 10.1002/ceat.201200479

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      Coalescence is an important technique to separate emulsified water from crude oil. A combined model of electrostatic and hydrodynamic fields was modified to simulate the electric field effects on the binary drop coalescence. The effects of influencing parameters have been investigated using Dipole-Induced Dipole as the electrostatic model and the Volume of Fluid approach as the hydrodynamic model.

    3. Fast Oxidative Removal of Refractory Aromatic Sulfur Compounds by a Magnetic Ionic Liquid (pages 36–42)

      Wei Jiang, Wenshuai Zhu, Huaming Li, Jun Xue, Jun Xiong, Yonghui Chang, Hui Liu and Zhen Zhao

      Version of Record online: 21 NOV 2013 | DOI: 10.1002/ceat.201300376

      Thumbnail image of graphical abstract

      Different magnetic ionic liquids (MIL) were synthesized and characterized. The MIL [C3H6COOHmim]Cl/2FeCl3 with H2O2 as oxidant was able to remove benzothiophene and dibenzothiophene completely from a model oil under mild conditions. The magnetic ionic liquid and the model oil could then be easily separated through magnet-assisted decantation.

    4. Controlled Air Oxidation of Plastic and Biomass in a Packed-Bed Reactor (pages 43–48)

      Qingmin Meng, Xiaoping Chen, Changsheng Bu and Jiliang Ma

      Version of Record online: 10 DEC 2013 | DOI: 10.1002/ceat.201300310

      Thumbnail image of graphical abstract

      Safe medical waste management is crucial to avoid exposure to or release of toxic materials. The impact of varying polypropylene (PP) contents on the controlled air oxidation performance of a PP/sawdust mixture, representing medical waste, was investigated in a packed-bed reactor at a fixed feed gas flow rate. The PP content significantly affected the product yield, composition, and gas production rate.

    5. Detailed Mathematical Analysis of Solute Transport in Armfield's Liquid Diffusion Apparatus (pages 49–58)

      Carlos A. Ramírez

      Version of Record online: 10 DEC 2013 | DOI: 10.1002/ceat.201300261

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      A simple experimental method to determine the aqueous NaCl diffusivity is Armfield's liquid diffusion apparatus. A comprehensive transport model is presented which allows the estimation of the diffusion coefficient from concentration-time data. The accurate model improves existing theoretical analyses of such data and can be tailored to study other challenging systems.

      Corrected by:

      Erratum: Erratum: Detailed Mathematical Analysis of Solute Transport in Armfield's Liquid Diffusion Apparatus

      Vol. 37, Issue 3, 378, Version of Record online: 6 FEB 2014

    6. Characterization of a Novel Flat-Panel Airlift Photobioreactor With an Internal Heat Exchanger (pages 59–64)

      Luce Helena Kochem, Nicéia Chies Da Fré, Cristiane Redaelli, Rosane Rech and Nilson Romeu Marcílio

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/ceat.201300420

      Thumbnail image of graphical abstract

      A novel bench-scale flat-panel airlift photobioreactor with an internal heat exchanger (FPA-IHE) separating the riser and downcomer zones was designed and characterized. The overall heat and mass transfer coefficients were determined, and the mixture and circulation times were estimated. The microalgae D. tertiolecta and C. minutissima presented high specific growth rates in the new FPA-IHE.

    7. Electrochemical Treatment of Rice Grain-Based Distillery Biodigester Effluent (pages 65–72)

      Abhinesh Kumar Prajapati and Parmesh Kumar Chaudhari

      Version of Record online: 11 NOV 2013 | DOI: 10.1002/ceat.201300035

      Thumbnail image of graphical abstract

      In ethanol production from rice, the biodigester effluent (BDE) is polluted with organic materials. Electrocoagulation to treat BDE of distilleries in terms of reduction of the chemical oxygen demand and color was examined using iron as sacrificial electrode. The influencing parameters pH, current density, electrolysis time, and electrode gaps were evaluated and settling and filtration studies performed.

    8. Kinetic Modeling of the Gas Antisolvent Process for Synthesis of 5-Fluorouracil Nanoparticles (pages 73–80)

      Nadia Esfandiari and Seyyed M. Ghoreishi

      Version of Record online: 28 NOV 2013 | DOI: 10.1002/ceat.201300431

      Thumbnail image of graphical abstract

      5-Fluorouracil (5-FU) nanoparticles were synthesized by a gas antisolvent process. Optimal experimental operating conditions were assessed by thermodynamic modeling. Various antisolvent addition rates were tested. Nucleation and growth parameters were determined by fitting the particle size distribution predicted by the model to experimental data.

    9. CFD Simulation and Modeling of Membrane-Assisted Separation of Organic Compounds from Wastewater (pages 81–86)

      Fariborz Barati, Mehdi Ghadiri, Reza Ghasemi and Hasan Mohammadi Nobari

      Version of Record online: 19 DEC 2013 | DOI: 10.1002/ceat.201300278

      Thumbnail image of graphical abstract

      The extraction of volatile organic compounds (VOC) from water in porous hollow fibers was simulated. The VOC stream and air as stripping gas were contacted using a porous hollow-fiber membrane contactor. The model equations derived were solved using computational fluid dynamics of momentum and mass transfer, and profiles of concentration and pressure were obtained.

    10. Multi-Objective Optimization of a Cross-Flow Plate Heat Exchanger Using Entropy Generation Minimization (pages 87–94)

      Mojtaba Babaelahi, Somayyeh Sadri and Hoseyn Sayyaadi

      Version of Record online: 21 NOV 2013 | DOI: 10.1002/ceat.201300411

      Thumbnail image of graphical abstract

      Multi-objective optimization of a cross-flow plate fin heat exchanger (PFHE) by an entropy generation minimization approach is described. A new approach, in which entropy generation was divided into two separate terms, was applied and led to a PFHE configuration with less entropy generation, pressure drop, pumping power, operating and total cost.

    11. Hydrothermal Liquefaction of Cypress: Effect of Water Amount on Structural Characteristics of the Solid Residue (pages 95–102)

      Hua-Min Liu and Ming-Fei Li

      Version of Record online: 19 DEC 2013 | DOI: 10.1002/ceat.201300368

      Thumbnail image of graphical abstract

      The mechanism of hydrothermal liquefaction of cypress was investigated by evaluating the effect of water amount on the structural characteristics of the solid residues obtained from liquefaction. The acid-soluble and acid-insoluble solid residues were characterized by different analysis methods, indicating the significant influence of the amount of water.

    12. A Novel Model for Predicting the Dense Phase Behavior of 3D Gas-Solid Fluidized Beds (pages 103–112)

      Salman Movahedirad, Mohsen Ghafari and Asghar Molaei Dehkordi

      Version of Record online: 3 DEC 2013 | DOI: 10.1002/ceat.201300432

      Thumbnail image of graphical abstract

      Simulation of bubble behavior in a bubble swarm is time-consuming using traditional methods. Here, the simple phenomenological model dynamically predicts the dense phase velocity at each point in 3D freely bubbling gas-solid fluidized beds. The bubble mirror image technique was applied to take wall effects into account and a modification for the particle velocity in the wake of gas bubbles was proposed.

    13. CFD Modeling of Micromixing and Velocity Distribution in a 1.7-MHz Tubular Sonoreactor (pages 113–122)

      Fahime Parvizian, Masoud Rahimi, Neda Azimi and Ammar A. Alsairafi

      Version of Record online: 3 DEC 2013 | DOI: 10.1002/ceat.201300231

      Thumbnail image of graphical abstract

      The competence of high-frequency ultrasound in micro-stream generation seems promising for future developments of new ultrasound equipment with higher efficiency. Velocity distribution and micromixing efficiency of 1.7-MHz piezoelectric transducers in a novel continuous tubular sonoreactor were investigated by means of computational fluid dynamics models.

    14. Numerical Analysis of Thermal Development of Laminar Flow in a Concentric Multilayer Annulus (pages 123–130)

      Youngmin Bae, Seong H. Kim, Jae-Kwang Seo and Young-In Kim

      Version of Record online: 3 DEC 2013 | DOI: 10.1002/ceat.201300528

      Thumbnail image of graphical abstract

      The thermal behavior of laminar flow in a concentric multilayer annulus is investigated, emphasizing the effects of the inner radius and number of fluid layers. The change in the heat transfer coefficient at the wall is found to be more evident at a small inner radius. Insertion of more than ten layers has less impact on the convective heat transfer in a layered annulus.

    15. Development of a CFD Model of Bubble Column Bioreactors: Part Two – Comparison of Experimental Data and CFD Predictions (pages 131–140)

      Dale D. McClure, John M. Kavanagh, David F. Fletcher and Geoffrey W. Barton

      Version of Record online: 5 DEC 2013 | DOI: 10.1002/ceat.201300546

      Thumbnail image of graphical abstract

      There is increasing interest in using CFD to model aerobic bioreactors. The influence of various terms like lift, drag, and bubble-induced turbulence in the CFD modeling of bubble column reactors was investigated. Reasonable agreement between simulation results and experimental data was obtained by incorporating bubble-induced turbulence and a volume fraction correction term for drag.

    16. New Insights into Acrylic Polymer Precipitation by Supercritical Fluids (pages 141–148)

      Antonio Montes, M. Dolores Gordillo, Clara Pereyra and Enrique J. Martínez de la Ossa

      Version of Record online: 6 DEC 2013 | DOI: 10.1002/ceat.201300509

      Thumbnail image of graphical abstract

      An acrylic copolymer used for drug delivery to the intestines was processed by supercritical CO2 to improve its final features. The effects of the operating conditions were evaluated regarding morphology, particle size and particle size distribution, in order to optimize the nanoparticle production.

    17. Cold Rich Bypass to Strippers for CO2 Capture by Concentrated Piperazine (pages 149–156)

      David H. Van Wagener and Gary T. Rochelle

      Version of Record online: 29 NOV 2013 | DOI: 10.1002/ceat.201200533

      Thumbnail image of graphical abstract

      Amine scrubbing will be the most dominant technology used for CO2 capture. In the 2-stage regeneration of piperazine, a cold rich bypass reduces the equivalent work requirement, the stripping steam in the overhead vapor, and balances the temperature approach in the main cross exchanger. It is most beneficial when the overhead vapor is not already countercurrently contacted with incoming rich solution.

    18. Concentrated Fenofibrate Nanoparticle Suspensions from Melt Emulsification for Enhanced Drug Dissolution (pages 157–167)

      Catharina Knieke, Ankit Rawtani and Rajesh N. Davé

      Version of Record online: 3 DEC 2013 | DOI: 10.1002/ceat.201300355

      Thumbnail image of graphical abstract

      With decreasing particle size, the activity of pharmaceutical drugs increases. Using a melt emulsification process, nanoparticle suspension are produced from micronized fenofibrate particles. Nanosuspensions with 30 % drug loading and median particle sizes of 150 nm are obtained upon proper stabilization. The reduced particle size enables a significant improvement of the drug dissolution rate.

  9. Communication

    1. Top of page
    2. Cover Picture
    3. Editorial Board
    4. Overview
    5. Contents
    6. Editorial
    7. Highlights
    8. Review
    9. Research Articles
    10. Communication
    1. Fully Automated Weighing of Liquid Substances with a Laboratory Robot (pages 168–172)

      Albert Werner, Tim Blaschke, Erik von Harbou and Hans Hasse

      Version of Record online: 3 DEC 2013 | DOI: 10.1002/ceat.201300605

      Thumbnail image of graphical abstract

      A new procedure for fully automatic weighing of liquid substances with a modular laboratory robot, configured for the treatment of liquid chemicals, is presented. Optimization of the laboratory robot with regard to its accuracy and functionality is described and evaluated. The obtained accuracy is greater than that of careful manual weighing.

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