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The total scattering structure factors of pure liquid n-pentanol, pentanal, and 5 of their mixtures, as determined by high energy synchrotron X-ray diffraction experiments, are presented. For the interpretation of measured data, molecular…

A single-layer graphene is synthesized on Cu foil in the absence of H2 flow by plasma enhanced chemical vapor deposition (PECVD). In lieu of an explicit H2 flow, hydrogen species are produced during methane decomposition process into their…

In the study, the effect of the volumetric velocity of the initial gaseous mixture on the catalytic properties of Zn-Zr-Cu/HSZ/Al$_2$O$_3$ in the conversion of dimethyl ether to olefins was studied. When the volumetric rate is increased by…

In warm (equilibrium temperature <1000 K) gas giant exoplanet atmospheres, the observation of trace species in abundances deviating from thermochemical equilibrium predictions could be used as an indicator of disequilibrium chemical…

地球与行星天体物理 · 物理学 2023-10-18 Benjamin Fleury , Yves Benilan , Olivia Venot , Bryana L. Henderson , Mark Swain , Murthy S. Gudipati

A high-pressure hydrogen micromix combustor has been investigated using direct numerical simulation with detailed chemistry to examine the flame structure and stabilisation mechanism. The configuration of the combustor was based on the…

Methane has been proposed as an exoplanet biosignature. Imminent observations with the James Webb Space Telescope may enable methane detections on potentially habitable exoplanets, so it is essential to assess in what planetary contexts…

地球与行星天体物理 · 物理学 2022-04-12 Maggie A. Thompson , Joshua Krissansen-Totton , Nicholas Wogan , Myriam Telus , Jonathan J. Fortney

The present study is devoted to the detailed numerical analysis of the combustion waves propagation through the lean hydrogen-air mixtures with suspended micro-droplets of water. Considered gaseous mixtures are characterized by a relatively…

流体动力学 · 物理学 2019-09-20 I. S. Yakovenko , A. D. Kiverin

To explore the electronic structure of the first aromatic superconductor, potassium-doped solid picene which has been recently discovered by Mitsuhashi et al with the transition temperatures $T_c=7 - 20$ K, we have obtained a…

超导电性 · 物理学 2015-05-14 Taichi Kosugi , Takashi Miyake , Shoji Ishibashi , Ryotaro Arita , Hideo Aoki

Auto-ignition process of stoichiometric mixture of methane-air is investigated using detailed chemical kinetics in a single-zone combustion chamber. Effect of initial temperature on start of combustion (SOC). The Arrhenius expression for…

化学物理 · 物理学 2017-12-08 Bagher Abareshi , Hassan Mohagheghi , Morteza Khosronia Kalalabadi

In recent years, several aromatic molecules (benzene-based rings) have been detected in the cold molecular cloud TMC-1, with its CN-derivative, benzonitrile (c-C$_6$H$_5$CN), also identified in other nearby cold sources. However, observed…

Streamer discharges can be used as a primary source of reactive species for plasma-assisted combustion. In this research we investigate positive streamers in a stoichiometric air-methane mixture at 1 bar and 300 K with a three-dimensional…

等离子体物理 · 物理学 2022-04-11 Dennis Bouwman , Jannis Teunissen , Ute Ebert

N-carbophenes are a class of two-dimensional covalent organic frameworks with potential for solid-state gas storage and as 2D topological materials. Previous studies have demonstrated that variations in their bonding, topology, and…

Chemiluminescence is the emission of light as a result of a nonadiabatic chemical reaction. The present work is concerned with understanding the yield of chemiluminescence, in particular how it dramatically increases upon methylation of…

We conducted survey observations of a glycine precursor, methanimine or methylenimine (CH$_2$NH), with the NRO 45 m telescope and the SMT telescope towards 12 high-mass and two low-mass star-forming regions in order to increase number of…

星系天体物理 · 物理学 2016-07-13 Taiki Suzuki , Masatoshi Ohishi , Tomoya Hirota , Masao Saito , Liton Majumdar , Valentine Wakelam

Mixtures involving nitrobenzene and hydrocarbons, or 1-alkanols and 1-nitroalkane, or nitrobenzene have been investigated based on a whole set of thermophysical properties available in the literature: excess molar functions (enthalpies,…

The formation of protein precursors, due to the condensation of atomic carbon under the low-temperature conditions of the molecular phases of the interstellar medium, opens alternative pathways for the origin of life. We perform peptide…

Aspects of predictions of activation-energy asymptotics concerning the dependence of the burning velocity on the equivalence ratio are examined here through both asymptotic analyses and numerical computation. In typical hydrocarbon-air…

流体动力学 · 物理学 2024-06-28 Prabakaran Rajamanickam

It is speculated that there might be some linkage between interstellar aldehydes and their corresponding alcohols. Here, an observational study and astrochemical modeling are coupled together to illustrate the connection between them. The…

A skeletal chemical kinetic mechanism containing 252 species and 1288 reactions for the simulation of premixed flames involving isooctane (representing gasoline) and 2MF blends has been proposed in the present work.

化学物理 · 物理学 2022-12-15 Atmadeep Bhattacharya

Evolved stars are primary sources for the formation of polycyclic aromatic hydrocarbons (PAHs) and dust grains. Their circumstellar chemistry is usually designated as either oxygen-rich or carbon-rich, although dual-dust chemistry objects,…

太阳与恒星天体物理 · 物理学 2015-12-23 N. L. J. Cox , P. Pilleri , O. Berne , J. Cernicharo , C. Joblin