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1.899 Aktuelle Fachpublikationen zum Thema temperature

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Entropy, Vol. 17, Pages 7811-7826: Thermodynamics Analysis of Variable Viscosity Hydromagnetic Couette Flow in a Rotating System with Hall Effects

20.11.2015 | Makinde, Oluwole D.; Eegunjobi, Adetayo S.; Tshehla, M. Samuel, Entropy, 2015

In this paper, we employed both first and second laws of thermodynamics to analyze the flow and thermal decomposition in a variable viscosity Couette flow of a conducting fluid in a rotating system under the combined influence of magnetic field and Hall current. The non-linear governing ...


A Continuous Fractionation of Ginsenosides and Polysaccharides From Panax Ginseng Using Supercritical Carbon Dioxide Technology

19.11.2015 | I‐Lung Yu, Zer‐Ran Yu, Malcolm Koo, Be‐Jen Wang, Journal of Food Processing and Preservation, 2015

Abstract A continuous supercritical carbon dioxide (SC‐CO2) fractionation was conducted to obtain ginsenosides and polysaccharides from Panax ginseng extract. P. ginseng was mixed with ethanol at a ratio of 1:4 (volume by weight) for 24 h to yield ethanol extract. SC‐CO2 fractionation was ...


Simulation of biomass char gasification in a downdraft reactor for syngas production

19.11.2015 | Augustina Ephraim, Victor Pozzobon, Olivier Louisnard, Doan Pham Minh, Ange Nzihou, Patrick Sharrock, AIChE Journal, 2015

Abstract A steady‐state, one‐dimensional computational fluid dynamics model of wood char gasification in a downdraft reactor is presented. The model is not only based on reaction kinetics and fluid flow in the porous char bed but also on equations of heat and mass conservation. An original ...


Modeling of wax deposition for water‐in‐oil dispersed flow

18.11.2015 | Yuanxin Zhou, Jing Gong, Pengyu Wang, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract Wax deposition for waxy crude oil is a long standing issue in oil production and transportation systems. With oil produced with water, the oil–water two‐phase wax deposition becomes a research hotspot. Experiments of water‐in‐oil emulsion wax deposition were conducted in the indoor ...


Miniature Flow-Through Low-Temperature Plasma Ionization Source for Ambient Ionization of Gases and Aerosols

18.11.2015 | Sandra E. Spencer; Brandon G. Santiago; Gary L. Glish, Analytical Chemistry, 2015

The design and operation of an inexpensive, miniature low-temperature plasma ion source is detailed. The miniature low-temperature plasma ion source is operated in a “flow-through” configuration, wherein the gaseous or aerosolized analyte, caffeine or pyrolyzed ethyl cellulose, in a carrier gas ...


High Activity and Regenerability of a Palladium‐gold Catalyst for Chloroform Degradation

17.11.2015 | Juan C. Velazquez, Sukit Leekumjorn, Gary D. Hopkins, Kimberly N. Heck, Jason S. McPherson, John A. Wilkens, Bradley ..., Journal of Chemical Technology & Biotechnology, 2015

Abstract Background Chloroform (CF), a common groundwater contaminant, can be degraded in deionized water reductively using Pd and Pd‐Au catalysts under mild conditions (room temperature, atmospheric pressure) via hydrodechlorination (HDC). However, the performance of these catalysts under ...


Microwave‐Osmotic/Microwave‐Vacuum Drying of Whole Cranberries: Comparison with Other Methods

13.11.2015 | Derek Wray, Hosahalli S. Ramaswamy, Journal of Food Science, 2015

Abstract A novel drying method for frozen‐thawed whole cranberries was developed by combining microwave osmotic dehydration under continuous flow medium spray (MWODS) conditions with microwave vacuum finish‐drying. A central composite rotatable design was used to vary temperature (33 to 67 ...


Study of parameters influencing fluid flow and wall hot spots in rotary kilns using CFD

13.11.2015 | Hassan F. Elattar, Eckehard Specht, Ali Fouda, Abdullah S. Bin‐Mahfouz, The Canadian Journal of Chemical Engineering, 2015

Abstract In this paper, 3‐D‐CFD simulation using (ANSYS‐Fluent) package on a 4 m diameter kiln with 40 m length firing methane (CH4) gas is applied to avoid undesirable thermal behaviour (wall hot spots; peak wall temperatures) in industrial rotary kilns. New influencing parameters are ...


Ba2InTaO6 – A Partially B‐Site‐Ordered Double Perovskite for Overall Water Splitting

13.11.2015 | Kai Song, Jia Yang, Pengfei Jiang, Wenliang Gao, Rihong Cong, Tao Yang, European Journal of Inorganic Chemistry, 2015

Abstract Completely B‐site‐ordered Ba2InTaO6 has been prepared previously by prolonged heating at 1500 °C; here, we significantly lowered the annealing temperature to 1130 °C under H2/Ar dynamic flow and obtained a partially ordered (ca. 74 %) double perovskite, as determined by Rietveld ...


Vapor Pressure of Hexamethylene Triperoxide Diamine (HMTD) Estimated Using Secondary Electrospray Ionization Mass Spectrometry

12.11.2015 | Matthew J. Aernecke; Ted Mendum; Geoff Geurtsen; Alla Ostrinskaya; Roderick R. Kunz, Journal of Physical Chemistry A, 2015

A rapid method for vapor pressure measurement was developed and used to derive the vapor pressure curve of the thermally labile peroxide-based explosive hexamethylene triperoxide diamine (HMTD) over the temperature range from 28 to 80 °C. This method uses a controlled flow of vapor from a ...


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