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1.756 Aktuelle Fachpublikationen zum Thema temperature

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Local measurement of mass transfer in a reactive spray for CO2 capture

13.11.2014 | Maria Ouboukhlik, Sawitree Saengkaew, Marie‐Christine Fournier‐Salaün, Lionel Estel, Gérard Grehan, The Canadian Journal of Chemical Engineering, 2014

Abstract CO2 capture is still a major challenge for the environment and decarbonisation of gas streams. It has been industrially feasible for several decades using chemical absorption by alkanolamine solvents. The purpose of this work is to characterize the mass transfer in a spray contactor ...

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Shock Tube Study of Dimethylamine Oxidation

12.11.2014 | Sijie Li, David F. Davidson, Ronald K. Hanson, International Journal of Chemical Kinetics, 2014

ABSTRACT Dimethylamine (DMA) ignition delay times and OH time histories during the oxidation process were investigated behind reflected shock waves. The ignition delay time measurements cover the temperature range of 1181–1498 K, with pressures near 0.9, 1.5, and 2.8 atm, and equivalence ...

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A new approach to determination of hydration equilibria constants for the case of [Er(EDTA)(H2O)n]− complexes

12.11.2014 | Rafał Janicki; Anna Mondry, Physical Chemistry Chemical Physics, 2014

Two anionic complexes [Er(EDTA)(H2O)2]− and [Er(EDTA)(H2O)3]− were obtained in the form of the following compounds: [C(NH2)3]2[Er(EDTA)(H2O)2]ClO4·6H2O (I) and Na[Er(EDTA)(H2O)3]·5H2O (II), respectively. The UV-vis-NIR absorption spectra of both monocrystals were measured at room temperature and ...

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Studying the effects of Zr-doping in (Bi0.5Na0.5)TiO3via diffraction and spectroscopy

11.11.2014 | Peter E. R. Blanchard; Samuel Liu; Brendan J. Kennedy; Chris D. Ling; Zhaoming Zhang; Maxim Avdeev; Ling-Yun Jang; J ..., Dalton Transactions, 2014

The structural properties of (Bi0.5Na0.5)Ti1−xZrxO3 (where 0 ≤ x ≤ 0.7) have been investigated using powder diffraction and X-ray absorption spectroscopy. Diffraction measurements on (Bi0.5Na0.5)TiO3 confirm that both monoclinic Cc and rhombohedral R3c phases are present at room temperature. ...

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Distinguishing co‐existing unimolecular and bimolecular structural forms using joint analysis of Raman and UV absorption data

11.11.2014 | Pavla Pečínková, Jiří Bok, Kateřina Hofbauerová, Josef Štěpánek, Journal of Raman Spectroscopy, 2014

Standard Raman measurements of solutions require relatively high concentration of dissolved species, which supports formation of intermolecular complexes. In case of simultaneous presence of unimolecular and bimolecular structural forms, it is often difficult or even impossible to discriminate ...

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Cooperativity of the Assembly Process in a Low Concentration Chromonic Liquid Crystal

11.11.2014 | Benjamin R. Mercado; Kenneth J. Nieser; Peter J. Collings, Journal of Physical Chemistry B, 2014

IR-806 is a near-infrared cyanine dye that undergoes a two-step assembly process in aqueous solutions. The final assemblies orientationally order into a liquid crystal at a very low concentration (∼0.6 wt % at room temperature). While the first step of the assembly process is continuous as the ...

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Molecules, Vol. 19, Pages 18351-18366: Femtosecond Laser Spectroscopy of the Rhodopsin Photochromic Reaction: A Concept for Ultrafast Optical Molecular Switch Creation (Ultrafast Reversible Photoreaction of Rhodopsin)

11.11.2014 | Smitienko, Olga ; Nadtochenko, Victor ; Feldman, Tatiana ; Balatskaya, Maria ; Shelaev, Ivan ; Gostev, Fedor ; Sarki ..., Molecules, 2014

Ultrafast reverse photoreaction of visual pigment rhodopsin in the femtosecond time range at room temperature is demonstrated. Femtosecond two-pump probe experiments with a time resolution of 25 fs have been performed. The first рump pulse at 500 nm initiated cis-trans photoisomerization of ...

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Structure Influence on Charge Transport in Naphthalenediimide–Thiophene Copolymers

11.11.2014 | Monika M. Szumilo; Eliot H. Gann; Christopher R. McNeill; Vincent Lemaur; Yoann Oliver; Lars Thomsen; Yana Vaynzof; ..., Chemistry of Materials, 2014

Reported here is a characterization of a series of NDI–thiophene copolymers with one, two, three, and four thiophene units synthesized using Stille polycondensation of dibromo-naphthalene diimide and the trimethylstannylthiophene monomers. The effect of extension of the thiophene donor group is ...

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Infrared Spectra and Structures of SiH4 and GeH4 Dimers in Low-Temperature Nitrogen Matrixes

10.11.2014 | Tatjana D. Kolomiitsova; Konstantin F. Savvateev; Dmitrii N. Shchepkin; Irina K. Tokhadze; Konstantin G. Tokhadze, Journal of Physical Chemistry A, 2014

IR absorption spectra of monoisotopic silane 28SiH4 and germane 76GeH4 are studied in nitrogen matrixes at T = 11 K. It is shown that the absorption spectra of silane and germane are similar in the regions of the ν3 stretching and ν4 bending vibrations. A significant influence of a nitrogen ...

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Insulating and Other Physical Properties of CoO‐Doped Zinc Oxyfluoride‐Borate Glass‐Ceramics

07.11.2014 | Padamati Naresh, Goli Naga Raju, Yerramreddy Gandhi, Michal Piasecki, Nalluri Veeraiah, Journal of the American Ceramic Society, 2014

Zinc oxy fluoro borate glasses mixed with different concentrations of CoO (ranging from 0 to 2.0mol%) are synthesized and subsequently crystallized. The scanning electron microscopy pictures have exhibited crystallinity. Differential scanning calorimetric studies have indicated that the ...

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