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5.626 Aktuelle Fachpublikationen aus der Branche Verfahrenstechnik

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Preferred calculation formula and buoyancy effect on capillary number

20.03.2015 | James J. Sheng, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract It has been well established in the literature that as the capillary number is increased, residual saturations are decreased. The concept of capillary number is very important in enhanced oil recovery. There are several definitions of the capillary number. Which equation properly ...

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Sensitivity of PBL parameterization schemes of Weather Research Forecasting Model and coupling with AERMOD in the dispersion of NOX over Visakhapatnam (India)

20.03.2015 | Rahul Boadh, A. N. V. Satyanarayana, T. V. B. P. S. Rama Krishna, Srikanth Madala, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract An attempt has been made to develop a pre‐processor coupler for offline coupling of atmospheric mesoscale model (WRF) with a dispersion model (AERMOD) to estimate the ground level concentrations due to industrial sources over a coastal city, Visakhapatnam, India. To integrate AERMOD ...

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Influence of polyamide 6 as a charring agent on the flame retardancy, thermal, and mechanical properties of polypropylene composites

18.03.2015 | Man Chen, Mengqi Tang, Yonghong Ma, Xiaolang Chen, Jun Qin, Weidi He, Zhibin Zhang, Polymer Engineering and Science, 2015

In this work, polyamide 6 (PA6) as a charring agent has been used in combination with thermoplastic polyurethane (TPU)‐microencapsulated ammonium polyphosphate (MTAPP) forming intumescent flame retardants (IFRs) which applies in polypropylene (PP). The effects of the IFRs on the flame ...

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Antifouling enhancement of PVDF membrane tethered with polyampholyte hydrogel layers

18.03.2015 | Xiang Shen, Xuebin Yin, Yiping Zhao, Li Chen, Polymer Engineering and Science, 2015

The preparation and property of antifouling poly(vinylidene fluoride) (PVDF) membrane tethered with polyampholyte hydrogel layers were described in this work. In fabricating these membranes, the [2‐(methacryloyloxy)ethyl] trimethylammonium chloride and 2‐acrylamide‐2‐methyl propane sulfonic acid ...

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Study on a new polymer/graphene oxide/clay double network hydrogel with improved response rate and mechanical properties

18.03.2015 | Weishi Huang, Jianfeng Shen, Na Li, Mingxin Ye, Polymer Engineering and Science, 2015

pH‐ and temperature‐responsive double network hydrogels (DN hydrogels) were prepared by using poly (N‐isopropylacrylamide) (PNIPAM) as a tightly crosslinked network (1st network), polyacrylic acid (PAA) as a loosely crosslinked network (2nd network), with clay and graphene oxide as effective ...

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Analysis of flow control by boundary‐layer manipulation using 2D frequency response

18.03.2015 | Pesila Ratnayake, Ridwan Setiawan, Jie Bao, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract Flow control is the manipulation of fluid flow into a desired behaviour with the purpose to either enhance mixing or suppress turbulence. However, because all flow systems are essentially distributed parameter systems, which are often described as partial differential equations, ...

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Detection of decomposition for high pressure ethylene/vinyl acetate copolymerization in autoclave reactor using principal component analysis on heat balance model

16.03.2015 | G Sivalingam, Nipun J. Soni, Suketu M. Vakil, The Canadian Journal of Chemical Engineering, 2015

Abstract The autoclave reactor offers flexibility in producing specialty grades of ethylene/vinyl acetate copolymer at temperature range of 150‐230 °C and pressure range of 1400‐2000 kg/cm2. At such conditions, copolymerization is accompanied by decomposition of reactants which increases the ...

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Effectiveness of purging on preventing gas emission buildup in wood pellet storage

16.03.2015 | Fahimeh Yazdanpanah, Shahab Sokhansanj, Choon Jim Lim, Anthony Lau, X. Bi, The Canadian Journal of Chemical Engineering, 2015

Abstract Storage of wood pellets has resulted in deadly accidents in connection with off‐gassing and self‐heating. A forced ventilation system should be in place to sweep the off‐gases and control the thermal conditions. In this study, multiple purging tests were conducted in a pilot scale ...

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Effect of N2 pretreatment on the basicity, structural change, and isomerization activity of MgO and MgO/Mg(OH)2 catalysts

16.03.2015 | Prinyanee Suttibut, Kongkiat Suriye, Sirachaya Kunjara Na Ayudhya, Piyasan Praserthdam, Joongjai Panpranot, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract As revealed by the X‐ray diffraction, basicity titration, and Fourier transform infrared spectroscopy results, changes in the structural properties, basicity, and isomerization activities were observed on the MgO catalysts upon N2 pretreatment at 325 °C followed by isomerization ...

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Viscosity model for choline chloride‐based deep eutectic solvents

16.03.2015 | Farouq S. Mjalli, Jamil Naser, Asia-Pacific Journal of Chemical Engineering, 2015

ABSTRACT In this work, a viscosity model for choline chloride‐based deep eutectic solvents (DESs) was developed. In addition to temperature, the new model presented here considers the composition of the salt in the DES, which was not the case for all previously reported viscosity models. Two ...

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