Chemical Engineering & Technology

Cover image for Vol. 40 Issue 2

Early View (Online Version of Record published before inclusion in an issue)

Impact Factor: 2.385

ISI Journal Citation Reports © Ranking: 2015: 39/135 (Engineering Chemical)

Online ISSN: 1521-4125

Associated Title(s): Chemie Ingenieur Technik, ChemBioEng Reviews, Energy Technology

VIEW

  1. 1 - 22
  1. Research Articles

    1. Effect of Shear Rate Distribution on Particle Aggregation in a Stirred Vessel

      Hayato Masuda, Kazuto Tsuda, Keisuke Matsui, Yoshiyuki Komoda and Naoto Ohmura

      Version of Record online: 10 FEB 2017 | DOI: 10.1002/ceat.201600332

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      The physical and rheological properties of fine particle suspensions are determined by the shear rate which influences the size of particle aggregates. A model of particle aggregation under a simple shear flow was constructed and extended to a stirred vessel. The representative shear rate was estimated from the aggregate size obtained with the stirred vessel and compared with the rate calculated by Metzner-Otto's method.

    2. Kinetic Model for Invertase-Induced Sucrose Hydrolysis: Initial Time Lag

      Ali Keramat, Ali Kargari, Morteza Sohrabi†, Hamed Mirshekar and Hamidreza Sanaeepur

      Version of Record online: 10 FEB 2017 | DOI: 10.1002/ceat.201400389

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      A comprehensive simple kinetic model was developed for invertase-induced sucrose hydrolysis. It is capable of predicting the reaction rate during the whole reaction pathway by considering the initial time lag at the reaction start and irreversible enzyme deactivation through the remaining pathway. The proposed model means a great progress for kinetic investigations of enzymatic reactions.

    3. Multivariate Modeling of a Chemical Toner Manufacturing Process

      Hassan Khorami, Hedia Fgaier, Ali Elkamel, Mazda Biglari and Baoling Chen

      Version of Record online: 9 FEB 2017 | DOI: 10.1002/ceat.201400433

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      The multiway partial least square method was combined with the nonlinear iterative partial least squares algorithm to correlate process variable data of a chemical toner manufacturing process to product quality variables. An empirical model was built by fourfold cross-validation that can represent the operation of a successful batch and identify faulty batches during quality control testing.

    4. Optimization of Epoxidized Methyl Acetoricinoleate Synthesis with by Response Surface Methodology

      Wei Xu, Xiao-Dong Ge, De-Lin Cheng, Rong Shao, Jian-Fei Ding, Xiu-Hua Yan and Ting-Ting Liu

      Version of Record online: 9 FEB 2017 | DOI: 10.1002/ceat.201600044

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      Ionic liquids are environmentally friendly alternative catalysts for epoxidation. Epoxidized methyl acetoricinoleate is generated by epoxidation of methyl acetoricinoleate in the presence of formic acid and hydrogen peroxide with ionic liquid catalysts. The effects of different factors are investigated by single-factor experiments.

    5. Mathematical Modeling of Reverse Water-Gas Shift Reaction in a Fixed-Bed Reactor

      Fatemeh Ghodoosi, Mohammad Reza Khosravi-Nikou and Ahmad Shariati

      Version of Record online: 9 FEB 2017 | DOI: 10.1002/ceat.201600220

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      The conversion of CO2 into CO, which can be achieved in the reverse water-gas shift (RWGS) reaction, by catalytic hydrogenation is one of the most promising processes for CO2 utilization. A two-dimensional, pseudo-homogeneous model is used to study the RWGS reaction in a fixed-bed reactor under steady-state conditions to describe the reaction kinetics.

  2. Reviews

    1. Dry Cleaning of Fine Coal Based on Gas-Solid Two-Phase Flow: A Review

      Xuliang Yang, Yuemin Zhao and Zhenfu Luo

      Version of Record online: 9 FEB 2017 | DOI: 10.1002/ceat.201600265

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      Dry cleaning of coal becomes increasingly significant to improve energy efficiency and reduce air pollutant emissions. Recent developments of fine coal dry cleaning based on gas-solid two-phase flow as well as cleaning mechanisms, influential factors, and cleaning performances of recent processes are reviewed. Advantages and limitations of these processes are also discussed.

  3. Research Articles

    1. Characterization of New Wire Gauze High-Capacity Structured Packing with Varied Inclination Angle

      Younes Amini, Javad Karimi-Sabet and Mohsen Nasr Esfahany

      Version of Record online: 9 FEB 2017 | DOI: 10.1002/ceat.201600351

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      Distillation is an efficient and economic separation method with application in various industries. A new high-capacity structured packing, PACK-1300, with various inclination angles was investigated for the separation of mixtures with low separation factor. Parametric studies were performed to evaluate the dry/wet pressure drop and mass-transfer efficiency under various operating conditions.

    2. Performance Enhancement of Polycondensate-Based Superplasticizers by Encapsulation

      Henning von Daake and Dietmar Stephan

      Version of Record online: 8 FEB 2017 | DOI: 10.1002/ceat.201600391

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      Encapsulation is a promising technology to improve the performance of different chemical admixtures. A cost-effective and robust encapsulation system for such admixtures with delayed release mechanisms used in construction materials is introduced. The performance enhancement of the admixtures is proved by investigations of the controlled admixture release in dry mix mortars.

    3. Gas-Solid Flow in an Airlift Loop Reactor: A Cluster Structure-Dependent Drag Model

      Juhui Chen, Cheng Meng, Shuai Wang and Xiaojiao Song

      Version of Record online: 8 FEB 2017 | DOI: 10.1002/ceat.201600104

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      A modified cluster structure-dependent drag model is incorporated into a two-fluid model to describe impacts of cluster structure on the fluidization in airlift loop reactors. The hydrodynamic characteristics are investigated by a computational fluid dynamics approach. The proposed model allows for a better prediction compared to experimental data and the traditional drag model.

    4. Free-Surface Turbulent Flow in an Eccentric Stirred Tank

      Fengling Yang, Shenjie Zhou and Cuixun Zhang

      Version of Record online: 8 FEB 2017 | DOI: 10.1002/ceat.201600354

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      Effective simulation of the flow dynamics in stirred tanks remains a major challenge due to its multidimensional and extremely complex nature. The free-surface turbulent flow in an eccentric stirred tank is modeled using a combination of the detached-eddy simulation and the volume of fluid model, affording a reasonable representation of the free-surface hydrodynamics compared with experimental data.

    5. Optimization of Continuous Synthesis of Cross-Linked Chitosan Nanoparticles Using Microreactors

      Noopur Rathi and Vilas G. Gaikar

      Version of Record online: 6 FEB 2017 | DOI: 10.1002/ceat.201600339

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      The continuous synthesis of cross-linked chitosan-sodium tripolyphosphate nanoparticles in a microreactor was optimized and modeled and compared with a batch reactor process. Population balance equations were applied to model the system in terms of growth and nucleation rates which are important for the physical understanding of the process and to control the particle size.

    6. Pulsatile Jet Cleaning of Filter Cloths Contaminated with Yeast Cells

      Roman Werner, Bernadette Bollwein, Roman Petersen, Johannes Tippmann and Thomas Becker

      Version of Record online: 2 FEB 2017 | DOI: 10.1002/ceat.201600049

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      The cleaning of filter cloths is necessary to guarantee short system downtime, product safety, and to avoid fouling. This article presents the suitability of pulsed jets to clean filter cloths. It includes parameter variations and the comparison to two other cleaning concepts.

    7. Oxidative Desulfurization of Model Diesel Using a Fenton-Like Catalyst in the Ionic Liquid [Dmim]BF4

      Shunan Wang, Pengcheng Li, Lingwan Hao, Changliang Deng, Wanzhong Ren and Hongying Lü

      Version of Record online: 2 FEB 2017 | DOI: 10.1002/ceat.201600098

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      A Fenton-like catalyst, (C4H9)4NFeCl4, was prepared and characterized. The high catalytic activity of the catalyst resulted in 98.3 % removal of dibenzothiophene in [Dmim]BF4, involving the structural distortion of DBT via polarization of the ionic liquid and subsequent oxidation. The system could be recycled eight times without significant decreases in activity.

    8. An Energy-Efficient Crude Distillation Unit with a Prefractionator

      Young Han Kim

      Version of Record online: 2 FEB 2017 | DOI: 10.1002/ceat.201600387

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      A crude distillation unit (CDU) is the first step in the refinery processing of crude oil and consumes a large amount of energy. To overcome this, an energy-efficient CDU has been proposed which reduces the energy demand through a two-column operation. In the proposed CDU, reduced feed-tray mixing lowers heat duty and saves investment and utility costs.

    9. Influence of Operating Parameters on Biomass Conversion under Sub- and Supercritical Water Conditions

      Khairuddin Md Isa, Farizul Hafiz Kasim, Saiful Azhar Saad, Mohd Asri Ab Rahim, Mohd Aizudin Abd Aziz and Umi Fazara Md Ali

      Version of Record online: 2 FEB 2017 | DOI: 10.1002/ceat.201600343

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      Biofuels are important alternatives to fossil fuels. The influence of reaction parameters on the conversion of miscanthus biomass to biofuels under sub- and supercritical water (SCW) conditions was investigated. The highest conversion was obtained under SCW conditions with a biomass-to-water mass ratio of 1:15. SCW is an effective reaction medium for converting biomass to oils in high yields.

    10. Experimental Approach to an Efficient and Versatile Water Filtration Vacuum Cleaner

      Ayman I. Bakry

      Version of Record online: 25 JAN 2017 | DOI: 10.1002/ceat.201600430

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      An innovative design of vacuum cleaners based on water filtration is proposed. The technique ensures a high initially constant negative suction pressure and leads to a low and constant exhaust air temperature with a slight increase in humidity. This preserves the entire cleaning power under all operating conditions, indicating improved utilization and conservation of energy.

    11. Natural Calcium-Based Sorbents Doped with Sea Salt for Cyclic CO2 Capture

      Yongqing Xu, Cong Luo, Ying Zheng, Haoran Ding, Dong Zhou and Liqi Zhang

      Version of Record online: 24 JAN 2017 | DOI: 10.1002/ceat.201500330

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      Calcium looping is used for post-combustion carbon dioxide capture. A simple method was applied to modify calcium-based sorbents for this purpose. The precursors were extremely cheap, readily available materials. Results showed that the CO2-capture capacity of sea-salt-doped limestone was 40 % higher than that of natural limestone sorbents.

    12. Comparative Analysis of Synthetic Natural Gas versus Hydrogen Production from Bagasse

      Stavros Michailos, David Parker and Colin Webb

      Version of Record online: 24 JAN 2017 | DOI: 10.1002/ceat.201600424

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      Two biomass-to-gases conversion routes, namely, hydrogen and synthetic natural gas production, with sugar cane bagasse as feedstock, were simulated and compared. Mass and energy balance data were derived from the simulations, and thermodynamic, economic, and environmental evaluations were performed. The synthetic natural gas production proved to be the overall most efficient option.

    13. Determination of Input Parameters for Crude-Oil Fouling Using an Integrated Non-Parametric Method

      Marc Forstenhäusler, Alireza Mirsadraee and M. Reza Malayeri

      Version of Record online: 24 JAN 2017 | DOI: 10.1002/ceat.201600392

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      Fouling of heat exchangers in oil refineries compromises their thermal efficiency and is also extremely expensive as a result of reduced process throughput and essential cleaning. An integrated, non-parametric model has been proposed based on the combination of neural networks and partial derivatives to determine the influence of operating parameters during crude-oil fouling.

    14. Operating Regimes and Hydrodynamics of a Rotating-Disc Contactor

      Hang Chen, Ze Sun, Xingfu Song and Jianguo Yu

      Version of Record online: 24 JAN 2017 | DOI: 10.1002/ceat.201500295

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      As an engineering practice, coupled computational fluid dynamics and population balance simulation was applied to identify the operating regimes for a pilot-scale rotating-disc contactor by predicting the critical rotor speed. The hydrodynamics of dispersed-phase holdup, droplet diameter, and axial mixing in different operating regimes was also discussed particularly to guide extraction operations.

  4. Reviews

    1. Design of an Intermediate Fluid Vaporizer for Liquefied Natural Gas

      Shuangqing Xu, Xuedong Chen and Zhichao Fan

      Version of Record online: 3 JAN 2017 | DOI: 10.1002/ceat.201500740

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      The liquefied natural gas industry is booming worldwide due to the global energy crisis. Intermediate fluid vaporizers exhibit distinct advantages over other vaporizer types and allow for a variety of potential applications in the regasification of liquefied natural gas. An overview on recent developments is given and future research needs and major challenges are proposed.

  5. Research Articles

    1. ANN Analysis of a Roller Compaction Process in the Pharmaceutical Industry

      Mustafa Sajjia, Saeed Shirazian, Catherine B. Kelly, Ahmad B. Albadarin and Gavin Walker

      Version of Record online: 28 DEC 2016 | DOI: 10.1002/ceat.201600229

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      An artificial neural network-based model was developed for a vertically fed roller compaction process. Under optimized conditions, the model showed an excellent accuracy and robustness. Comparing the model prediction capabilities, the developed model by far exceeds the Johanson model and is applicable to pharmaceutical processing for achieving a quality-by-design approach in this industry.

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