Chemical Engineering & Technology

Cover image for Vol. 38 Issue 1

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

Impact Factor: 2.175

ISI Journal Citation Reports © Ranking: 2013: 39/133 (Engineering Chemical)

Online ISSN: 1521-4125

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

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  1. 1 - 15
  1. Research Articles

    1. Multiple Regression Analysis of Catalytic Dehydrogenation of Isopropanol in a Chemical Heat Pump System

      Mehmet Selçuk Mert, İnci Salt, Fatma Karaca, Hatice Hande Mert and Esen Bolat

      Article first published online: 22 DEC 2014 | DOI: 10.1002/ceat.201400277

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      As a clean technology, chemical heat pumps are able to upgrade low-level thermal energy to upper levels and store energy without losses. Dehydrogenation of isopropanol can serve as a first step in such a system. The enhancing effects of Raney-Ni, Pt/C, and Ru/C type catalysts and alkaline NaOH additive on the dehydrogenation reaction of isopropanol were investigated statistically.

    2. Influence of Design Parameters on Hydrodynamics and Heat Transfer of a Modularized Millireactor

      Philip Biessey and Marcus Grünewald

      Article first published online: 22 DEC 2014 | DOI: 10.1002/ceat.201400645

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      Reactors on a milli-scale open the possibility to develop modular equipment that allows for flexible production. An apparatus with rectangular product channels and mixing elements for process intensification is investigated in terms of hydrodynamics and heat transfer. The apparatus performs competitively with established reactor concepts and is, thus, an alternative for modular production units.

    3. Gradient-Direction-Pattern Transform for Automated Measurement of Oil Drops in Images of Multiphase Dispersions

      Alfonso Rojas-Domínguez, Alehlí Holguín-Salas, Enrique Galindo and Gabriel Corkidi

      Article first published online: 22 DEC 2014 | DOI: 10.1002/ceat.201400208

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      Automated detection and measurement of oil drops in multiphase fermentation systems are essential for mass transfer analysis. The gradient-direction-pattern transform as a novel automatic technique for detection of circular objects is proposed. Oil drops in a three-phase system simulating a fermentation broth were analyzed, achieving higher performance than other techniques.

    4. Design of a Cone-Cone Shear Cell to Study Emulsification Characteristics

      Tobias Merkel, M. Azad Emin, Anna Schuch and Heike P. Schuchmann

      Article first published online: 18 DEC 2014 | DOI: 10.1002/ceat.201400486

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      Emulsion-based products are widely used in the food, chemical, and pharmaceutical industries. A novel cone-cone shear cell to study emulsification characteristics is described. The flow conditions inside the shear cell are validated via numerical simulations and experimental results.

    5. Catalytic Hydrocracking of a Bitumen-Derived Asphaltene over NiMo/γ-Al2O3 at Various Temperatures

      Yingxian Zhao, Xiao Lin and Da Li

      Article first published online: 18 DEC 2014 | DOI: 10.1002/ceat.201300139

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      Catalytic hydrocracking could be a proper choice for asphaltene upgrading but the reaction conditions still need to be optimized. Hydrocracking of a bitumen-derived asphaltene over a NiMo/γ-Al2O3 catalyst in a microbatch reactor at varying temperatures was analyzed. The molar kinetics of asphaltene cracking reaction was evaluated by fitting the experimental data.

  2. Communications

    1. Heat Transfer Phenomena of Power Law Fluids in Double-Pass Heat Exchangers with Isoflux Conditions

      Chii-Dong Ho, Gwo-Geng Lin, Thiam Leng Chew, Wei-Hao Lan and Cheng-Yi Lin

      Article first published online: 18 DEC 2014 | DOI: 10.1002/ceat.201400325

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  3. Research Articles

    1. Synthesis of Nanocrystalline CeO2 with High Surface Area by the Taguchi Method and its Application in Methanation

      Behzad Nematollahi, Mehran Rezaei and Ebrahim Nemati Lay

      Article first published online: 12 DEC 2014 | DOI: 10.1002/ceat.201400092

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      CeO2 is considered a promising support for a CO methanation catalyst. Mesoporous nanocrystalline CeO2 with high surface area was synthesized by precipitation using a cationic surfactant and applied as a Ni catalyst support. The prepared catalyst exhibited high activity compared to a commercial methanation catalyst.

    2. Combustion and Agglomeration Characteristics of the Residue from Corn Stalk-Based Cellulosic Ethanol

      Qiangqiang Ren, Shiyuan Li, Dongyu Wang, Shaolin Bao and Qinggang Lu

      Article first published online: 12 DEC 2014 | DOI: 10.1002/ceat.201400235

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      For the biomass-to-ethanol production chain, a clean usage of the solid residue originating from lignocellulose-based fuel ethanol is essential. Some key issues for residue combustion in a circulating fluidized bed are investigated. Experimental analyses provide a theoretical basis the operation of a circulating fluidized bed boiler for effective combustion of residues with high moisture content.

    3. Back Pressure Regulation of Slurry-Forming Reactions in Continuous Flow

      Benjamin J. Deadman, Duncan L. Browne, Ian R. Baxendale and Steven V. Ley

      Article first published online: 12 DEC 2014 | DOI: 10.1002/ceat.201400445

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      Current devices for regulating back pressure in continuous chemical synthesis are susceptible to blockage by solid particulates. A simple device is presented for safely generating back pressure in continuous flow processes involving chemical slurries. It is constructed from commercially available components, adaptable, and effective in the flow processing of thick chemical slurries.

    4. CO2 Capture Using Monoethanolamine in a Bubble-Column Scrubber

      Pao-Chi Chen, Yi Xin Luo and Pao Wein Cai

      Article first published online: 12 DEC 2014 | DOI: 10.1002/ceat.201400240

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      Absorption is a highly effective technology for CO2 capture as compared to other relevant processes. Capturing CO2 gas by monoethanol-amine solution in a continuous bubble-column scrubber was applied to evaluate optimum process parameters by means of the Taguchi method. A comparison of the obtained data with literature data confirmed the superior performance of the bubble-column scrubber.

    5. Retrofitting of the Heat Exchanger Network with Steam Generation in a Crude Oil Distillation Unit

      Wugen Gu, Xiaozhong Chen, Kai Liu, Bingjian Zhang, Qinglin Chen and Chi-Wai Hui

      Article first published online: 5 DEC 2014 | DOI: 10.1002/ceat.201400232

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      Steam generation is an alternative approach for enhancing heat recovery, with an important impact on the utility consumption. The grand composite curve is applied to reveal the interrelationship between steam generation and utility consumption. The steam generation parameters are optimized by a MILP model and the hot stream is determined according to its exergy consumption for steam generation.

    6. Effects of Viscous Dissipation and Rarefaction on Parallel Plates with Constant Heat Flux Boundary Conditions

      Hari Mohan Kushwaha and Santosh K. Sahu

      Article first published online: 5 DEC 2014 | DOI: 10.1002/ceat.201400264

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      Since asymmetric heat flux boundary conditions in microchannels are not yet defined, heat transfer and fluid flow behavior of thermally and hydrodynamically fully developed flow between parallel plates incorporating the effect of viscous dissipation and rarefaction were investigated. Closed form expressions for temperature distribution and Nu as a function of various modeling parameters were obtained.

    7. Esterification of Renewable Levulinic Acid to n-Butyl Levulinate over Modified H-ZSM-5

      Kakasaheb Y. Nandiwale and Vijay V. Bokade

      Article first published online: 5 DEC 2014 | DOI: 10.1002/ceat.201400326

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      The modified zeolite catalyst H-ZSM-5 (micro/meso-HZ-5) was used as heterogeneous acid catalyst in the esterification of renewable levulinic acid with n-butanol to produce n-butyl levulinate in a closed system. Micro/meso-HZ-5 turned out to be an efficient catalyst with 98 % yield of n-butyl levulinate and high reusability.

    8. Design and Control of Ionic Liquid-Catalyzed Reactive Distillation for n-Butyl Acetate Production

      Xuan Peng and Likun Wang

      Article first published online: 5 DEC 2014 | DOI: 10.1002/ceat.201400422

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      Design and control of n-butyl acetate production by applying reactive distillation technology and the green [Hpy][HSO4] catalyst are investigated. The steady-state parameters of the reactive distillation process are optimized by economic evaluation and an effective plant-wide control structure is developed to improve the robustness of the control system.

    9. Ultrasonic Hot Embossed Polymer Microreactors for Optical Measurement of Chemical Reactions

      Alexander Tollkötter, Johannes Sackmann, Tobias Baldhoff, Werner Karl Schomburg and Norbert Kockmann

      Article first published online: 4 DEC 2014 | DOI: 10.1002/ceat.201400522

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      Ultrasonic hot embossing of chemically resistant polymers as a simple and cost-effective fabrication method of microstructures and an optical analysis tool for tracing the progress of chemical reactions are introduced and evaluated. The simplicity of the fabrication method itself and good similarities of produced polymer micromixers with conventional ones made of other materials are pointed out.

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