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4.230 Aktuelle Fachpublikationen zum Thema temperature

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Continuous Flow of Nitroso Diels-Alder Reaction

01.07.2015 | erika nakashima; Hisashi Yamamoto, Chemical Communication, 2015

Our flow reaction systems have provided quantitative yields of nitroso Diels-Alder products with no byproducts in cases of cyclic dienes without temperature and pressure controls. Additionally, the reaction times were significantly shortened by using homogeneous catalyst (CuCl) or heterogeneous ...

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Evaluation of pure‐component adsorption properties of silicalite based on the langmuir and sips models

27.06.2015 | Alessio Caravella, Pasquale F. Zito, Adele Brunetti, Enrico Drioli, Giuseppe Barbieri, AIChE Journal, 2015

Abstract In this work, the adsorption parameters of several light gases and hydrocarbons (H2, CH4, CO2, CO, N2, C2H6, C3H8, n‐C4H10) in Silicalite are estimated along with and their functionality with temperature using both Langmuir and Sips models. This is a scientific attempt to resume and ...

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Pure H2 production through hollow fiber hydrogen‐selective MFI zeolite membranes using steam as sweep gas

27.06.2015 | Yuting Zhang, Qi Sun, Xuehong Gu, AIChE Journal, 2015

Abstract Hollow fiber MFI zeolite membranes were modified by catalytic cracking deposition of methyldiethoxysilane (MDES) to enhance their H2/CO2 separation performance and further employed in high temperature water gas shift membrane reactor (MR). Steam was used as the sweep gas in the MR for ...

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Stability and Decomposition of Ca‐Substituted Lanthanum Ferrite in Reducing Atmospheres

26.06.2015 | Patrick M. Price, Darryl P. Butt, Journal of the American Ceramic Society, 2015

Calcium‐substituted lanthanum ferrites (La1−xCaxFeO3−δ x=0, 0.1, 0.2, 0.3, 0.4) were synthesized in air and subsequently decomposed in reducing atmospheres. The partial pressure of oxygen () was controlled by varying the H2/H2O ratio by bubbling hydrogen/argon mixtures through water baths at ...

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Smoluchowski Equations for Agglomeration in Conditions of Variable Temperature and Pressure and a New Scaling of Rate Constants: Application to Nozzle-Beam Expansion

26.06.2015 | J. Chaiken; J. Goodisman; O. Kornilov, Journal of Physical Chemistry A, 2015

The Smoluchowski equations provide a rigorous and efficient means for including multiple kinetic pathways when modeling coalescence growth systems. Originally written for a constant temperature and volume system, the equations must be modified if temperature and pressure vary during the ...

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Prediction of Optimal Salinities for Surfactant Formulations Using a Quantitative Structure–Property Relationships Approach

26.06.2015 | Christophe Muller; Ana G. Maldonado; Alexandre Varnek; Benoit Creton, Energy & Fuels, 2015

Each oil reservoir could be characterized by a set of parameters such as temperature, pressure, oil composition, and brine salinity, etc. In the context of the chemical enhanced oil recovery (EOR), the selection of high performance surfactants is a challenging and time-consuming task since this ...

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Experimental determination of CO2 diffusion coefficient in aqueous solutions under pressure at room temperature via Raman spectroscopy: impact of salinity (NaCl)

25.06.2015 | Clément Belgodere, Jean Dubessy, Denis Vautrin, Marie‐Camille Caumon, Jérôme Sterpenich, Jacques Pironon, Pascal Rob ..., Journal of Raman Spectroscopy, 2015

The accurate determination of the diffusion coefficient of dissolved CO2 in aqueous solutions is a key parameter to predict the transport of the dissolved gas in the aqueous solution of porous aquifers and caprocks in the context of the mitigation of greenhouse gases emissions. A better ...

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Energies, Vol. 8, Pages 6365-6381: An Experimental Investigation on the Combustion and Heat Release Characteristics of an Opposed-Piston Folded-Cranktrain Diesel Engine

25.06.2015 | Ma, Fukang ; Zhao, Changlu ; Zhang, Fujun ; Zhao, Zhenfeng ; Zhang, Zhenyu ; Xie, Zhaoyi ; Wang, Hao, Energies, 2015

In opposed-piston folded-cranktrain diesel engines, the relative movement rules of opposed-pistons, combustion chamber components and injector position are different from those of conventional diesel engines. The combustion and heat release characteristics of an opposed-piston folded-cranktrain ...

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First Evidence of Rh Nano-Hydride Formation at Low Pressure

24.06.2015 | Claudia Zlotea; Yassine Oumellal; Mariem Msakni; Julie Bourgon; Stéphane Bastide; Christine Cachet-Vivier; Michel La ..., Nano Letters, 2015

Rh-based nanoparticles supported on a porous carbon host were prepared with tunable average sizes ranging from 1.3 to 3.0 nm. Depending on the vacuum or hydrogen environment during thermal treatment, either Rh metal or hydride is formed at nanoscale, respectively. In contrast to bulk Rh that can ...

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High-Pressure Phase Behavior of Poly(l-lactic acid), Trichloromethane, and Carbon Dioxide Ternary Mixture Systems

24.06.2015 | Taehyun Im; JungMin Gwon; Soo Hyun Kim; Hun Yong Shin; Hwayong Kim, Journal of Chemical & Engineering Data, 2015

In this study, the phase behavior of a poly(l-lactic acid) (M = 312 000, polydispersity 2.189)–trichloromethane–carbon dioxide ternary system was measured using a variable volume view cell at pressures up to 34.0 MPa and temperatures between (313.15 K and 363.15) K at an interval of 10 K. Bubble ...

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