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5.546 Aktuelle Fachpublikationen aus der Branche Verfahrenstechnik

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

12.12.2014 | Behzad Nematollahi, Mehran Rezaei, Ebrahim Nemati Lay, Chemical Engineering & Technology, 2014

Abstract Mesoporous nanocrystalline cerium(IV) oxide (CeO2) with high surface area was synthesized by precipitation using a cationic surfactant and employed as support for a nickel catalyst in CO methanation. The preparation factors of CeO2 were optimized by the Taguchi method to achieve a ...

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Combustion and Agglomeration Characteristics of the Residue from Corn Stalk‐Based Cellulosic Ethanol

12.12.2014 | Qiangqiang Ren, Shiyuan Li, Dongyu Wang, Shaolin Bao, Qinggang Lu, Chemical Engineering & Technology, 2014

Abstract Lignocellulose is considered an efficient raw material to produce fuel ethanol. Clean utilization of the solid residue derived from lignocellulose‐based fuel ethanol is important for the biomass‐to‐ethanol production chain. Combustion characteristics of the residue originating from ...

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Back Pressure Regulation of Slurry‐Forming Reactions in Continuous Flow

12.12.2014 | Benjamin J. Deadman, Duncan L. Browne, Ian R. Baxendale, Steven V. Ley, Chemical Engineering & Technology, 2014

Abstract The handling of solid components in flow chemical processes is still a significant challenge. Current devices for regulating back pressure in laboratory‐scale flow chemistry experiments are vulnerable to blockage by solid particulates. A simple device is presented herein for ...

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CO2 Capture Using Monoethanolamine in a Bubble‐Column Scrubber

12.12.2014 | Pao‐Chi Chen, Yi Xin Luo, Pao Wein Cai, Chemical Engineering & Technology, 2014

Abstract A continuous bubble‐column scrubber, capturing CO2 gas by monoethanolamine (MEA) solution in a pH‐stat operation, is used to search for optimum process parameters by means of the Taguchi method. The process variables are the pH of the solution, gas flow rate, concentration of CO2 gas, ...

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Modeling of diffusional limitations in styrene acrylonitrile random bulk copolymerization

12.12.2014 | Rajeshwar Mahajan, Santosh K. Gupta, Polymer Engineering and Science, 2014

Diffusional limitations (the gel, glass, and cage effects) are manifested in several bulk free radical homopolymerizations as well as in random copolymerizations. These are associated with decreases of several orders of magnitude of the rate constants of termination, propagation, and initiation ...

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Time‐dependent exhaust steam temperature profile to mitigate fouling

11.12.2014 | Divya Srivastava, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT In sugar industries, a decrease in the exit liquor concentration is observed because of fouling in multiple‐effect evaporator (MEE) systems, which finally decreases the yield of the MEE system. In the present work, a time‐dependent exhaust steam temperature profile has been developed ...

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Novel temperature‐sensitive and pH‐sensitive polyurethane membranes: preparation and characterization

10.12.2014 | Hu Zhou, Bin Yu, Ruiping Xun, Ning Li, Kejian Wu, Hanzhou Sun, Zhihua Zhou, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT The polyurethane (PU) membranes with temperature and pH double sensitivities for water permeation were designed and prepared from a two‐step solution polymerization from the crystalline polycaprolactone diols (PCL), 4,4′‐diphenylmethane diisocyanate (MDI) and pH‐sensitive ...

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Effects of unsteady expansion/contraction of Wang's cylinder problem with suction near a stagnation point

10.12.2014 | Tariq Javed, Irfan Mustafa, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT The unsteady viscous incompressible stagnation point flow over an expanding/contracting cylinder with heat and mass transfer is studied in this article. The governing partial differential equations are transformed into a couple nonlinear ordinary differential equations by using ...

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An analytical study of the acoustic force implication on the settling velocity of non‐spherical particles in the incompressible Newtonian fluid

10.12.2014 | A. R. Noorpoor, S. Nazari, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT In this paper, the effect of the acoustic radiation force on the acceleration motion of a vertically falling non‐spherical particle in the incompressible Newtonian fluid is investigated. The using of the acoustic radiation force for increasing the falling velocity of particles ...

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Morphology and mechanical properties of high density polyethylene‐POSS hybrid nanocomposites obtained by reactive blending

09.12.2014 | Magdalena Grala, Zbigniew Bartczak, Polymer Engineering and Science, 2014

The high density polyethylene‐polyhedral oligomeric silsesquioxane (HDPE‐POSS) organic–inorganic hybrids were obtained and their properties studied. The hybrids were prepared by grafting of POSS on polyethylene chains during reactive melt‐blending of HDPE, maleic anhydride functionalized HDPE ...

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