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3.187 Aktuelle Fachpublikationen zum Thema temperature

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Developing a mathematical model for the oxidative dehydrogenation of propane in a fluidized bed reactor

05.02.2016 | Ali Torabi, Mohammad Kazemeini, Moslem Fattahi, Asia-Pacific Journal of Chemical Engineering, 2016

Abstract In this research, a mathematical model to simulate a two‐phase fluidized bed reactor for oxidative dehydrogenation of propane to propylene was developed. The developed model was solved numerically using the matlab software. Moreover, effects of the reaction temperature, operating ...

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Self-Assembly of Graphene Nanoblisters Sealed to a Bare Metal Surface

05.02.2016 | Rosanna Larciprete; Stefano Colonna; Fabio Ronci; Roberto Flammini; Paolo Lacovig; Nicoleta Apostol; Antonio Politan ..., Nano Letters, 2016

The possibility to intercalate noble gas atoms below epitaxial graphene monolayers coupled with the instability at high temperature of graphene on the surface of certain metals has been exploited to produce Ar-filled graphene nanosized blisters evenly distributed on the bare Ni(111) surface. We ...

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Direct numerical simulations of dynamic gas‐solid suspensions

05.02.2016 | Y. Tang, E.A.J.F. Peters, J.A.M. Kuipers, AIChE Journal, 2016

Abstract We report direct numerical simulation results for gas flow through dynamic suspensions of spherical particles. The simulations are performed using an immersed boundary method (IBM), with careful correction for the grid resolution effect. The flow systems we have studied vary with mean ...

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Denitrification coupled with methane oxidation in a membrane bioreactor after methanogenic pre‐treatment of wastewater

04.02.2016 | A. Sánchez, L. Rodríguez‐Hernández, D. Buntner, A.L. Esteban‐García, I. Tejero, J.M. Garrido, Journal of Chemical Technology & Biotechnology, 2016

Abstract Background The presence of dissolved methane, represents an important environmental problem related to greenhouse gas emissions from wastewater treated in methanogenic bioreactors. Methane has a global warming potential of 28. For low‐strength wastewaters, as sewage, dissolved ...

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Low Temperature Rate Constants for the Reactions of O(1D) with N2, O2, and Ar

04.02.2016 | Romain Grondin; Jean-Christophe Loison; Kevin M. Hickson, Journal of Physical Chemistry A, 2016

The kinetics of the gas-phase quenching reactions O(1D) + N2, O(1D) + O2, and O(1D) + Ar have been studied over the 50–296 K temperature range using the Laval nozzle method. O(1D) atoms were created in situ by the pulsed photolysis of O3 precursor molecules at 266 nm. Rate constants for these ...

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Distribution of Vanadium, Nickel, and Other Trace Metals in Soot and Char from Asphaltene Pyrolysis and Gasification

04.02.2016 | Vinoj Kurian; Rajender Gupta, Energy & Fuels, 2016

Vanadium (V) and nickel (Ni) are the most abundant and troublesome metals present in oil sands. During upgrading of the oil sand bitumen, these metals become concentrated in the heavier fraction asphaltenes. Any thermochemical conversion of asphaltene causes the release of these trace metals, and ...

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Energies, Vol. 9, Pages 94: Overcoming the Fundamental Limit: Combustion of a Hydrogen-Oxygen Mixture in Micro- and Nano-Bubbles

03.02.2016 | Svetovoy, Vitaly ; Postnikov, Alexander ; Uvarov, Ilia ; Sanders, Remco ; Krijnen, Gijs, Energies, 2016

Combustion reactions quench in small volumes due to fast heat escape via the volume boundary. Nevertheless, the reaction between hydrogen and oxygen was observed in nano- and micro-bubbles. The bubbles containing a mixture of gases were produced in microsystems using electrochemical decomposition ...

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Reactivity Control of Rhodium Cluster Ions by Alloying with Tantalum Atoms

03.02.2016 | Fumitaka Mafuné; Yuki Tawaraya; Satoshi Kudoh, Journal of Physical Chemistry A, 2016

Gas phase, bielement rhodium and tantalum clusters, RhnTam+ (n + m = 6), were prepared by the double laser ablation of Rh and Ta rods in He carrier gas. The clusters were introduced into a reaction gas cell filled with nitric oxide (NO) diluted with He and were subjected to collisions with NO and ...

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The Effect of the Gas-Solid Contacting Pattern in a High-Temperature Thermochemical Energy Storage on the Performance of a Concentrated Solar Power Plant

02.02.2016 | Stefan Ströhle; Andreas Haselbacher; Zoran R Jovanovic; Aldo Steinfeld, Energy & Environmental Science, 2016

This work investigates how the gas-solid contacting pattern in a thermochemical energy storage charged and discharged by air as the heat transfer fluid influences (1) the integration of the storage into a concentrated solar power plant and (2) the performance of the power plant. The investigation ...

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Assessing Atmospheric CO2 Entrapped in Clay Nanotubes using Residual Gas Analyzer

02.02.2016 | Sankar Das; Abhijit Maity; Manik Pradhan; Subhra Jana, Analytical Chemistry, 2016

A residual gas analyzer (RGA) coupled with a high-vacuum chamber has been explored to measure atmospheric CO2 entrapped in aminosilane-modified clay nanotubes. Ambient CO2 uptake efficacy together with stability of these novel adsorbents composed of both primary and/or secondary amine sites has ...

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