Results 111 to 120 of about 45,409 (167)

The influence of rotation on the vibrational relaxation of the CH4 molecule. Study of the transfers CH4(ν2) + Ar → CH4(0) + Ar and CH4(ν4) + Ar → CH4(0) + Ar

Chemical Physics, 1983
Abstract The influence of rotational energy transfers on the vibrational relaxation of the ν 2 and ν 4 modes of CH 4 are studied. The interaction matrix is built up in the framework of the semiclassical coupled-states approximation using the asymptotic expression of (3 j ) symbols. It is assumed that the intermolecular potential is the sum of five
Georges Jolicard, Marie-Yvonne Perrin
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Kinetic models for the CH4(ν3) deactivation in CH4-CH4 collisions. Interpretation of experimental results

Chemical Physics Letters, 1983
Abstract Various kinetic models for the CH 4 (ν 3 ) deactivation in CH 4 -CH 4 collisions at low temperatures ( T ⪅ 300 K) are proposed and applied to interpret recently published experimental results. We discuss the value of the rate constant of the single-quantum process CH 4 (2ν 4 ) → CH 4 (ν 4 ) (V-T,R process).
J. Laterrasse, M. Huetz-Aubert
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Accurate rovibrational spectroscopy of relevant astrochemical complexes: CH4⋯CH4, CH4⋯N2 and CH4⋯Ar

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Rovibrational spectroscopic properties of CH4⋯CH4, CH4⋯N2, and CH4⋯Ar weakly bound complexes are relevant to astrophysics and astrochemistry, with particular interest to research on Titan's atmosphere. Different methodologies were applied to achieve the high accuracy required to fill the data gap in the literature of these complexes, particularly ...
Cassius M C, Carvalho, Ricardo, Gargano, João B L, Martins, José Roberto S, Politi   +3 more
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Calculations on the excess enthalpy of the mixtures CH4-Ar, CH4-N2, H2-CH4, He-CH4 and He-Ar at high densities

Physica, 1968
Abstract The behaviour of a binary mixture at high density can satisfactorily be described by the liquid “theories” of Prigogine and Scott. Starting from the assumption that the mixture and its components obey the law of the corresponding states it is possible to form a reduced equation of state with variables reduced with parameters of the mixture ...
B. Van Eijnsbergen, J.J.M. Beenakker
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Photoacoustic study of ch4 (v2, v4) deactivation in CH4-CH4 and CH4-monoatomic collisions

Chemical Physics Letters, 1982
Abstract Energy transfer between the first two vibrational levels v 2 , v 4 of the CH 4 molecule and the transition-rotation degrees or freedom is studied experimentally using the photoacoustic method V → TR rate constants are determined for pure CH 4 , CH 4 -He, CH 4 -Ne and CH 4 -Ar mixtures between 140 and 373 K.
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Direct Measurement of the Intermolecular Potentials of CH4–Xe, CH4–Kr, CH4–Ar, and CH4–Ne from the Extended Principle of Corresponding States

Bulletin of the Chemical Society of Japan, 1996
Abstract An inversion procedure is used to obtain from the extended principle of corresponding states the interaction potentials over a range of reduced temperature extending from 1 to the onset of ionization. These directly measured potentials for CH4–Xe, CH4–Kr, CH4–Ar, and CH4–Ne agree excellently with the potentials independently ...
Ali Boushehri, Fariba S Hashemi
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Reply to comment on “kinetic models for the CH4(ν3) deactivation in CH4CH4 collisions” by T.F. Hunter

Chemical Physics Letters, 1984
Abstract In our paper we analysed recently published results on CH 4 (ν 3 ) collisional deactivation. The kinetic models developed in that paper have enabled us to interpret the results obtained by Avramides and Hunter (contrary to the assertion in Hunter's Comment).
J. Laterrasse, M. Huetz-Aubert
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Rotational tunneling in CH4 under pressure (CH4 III)

The Journal of Chemical Physics, 1982
High resolution neutron inelastic scattering techniques were used to measure tunneling spectra of methane (CH4) in its phase III. By increasing the pressure from 0.6 to 1.8 kbar the tunneling lines shift by about a factor of 1.5. The rather complicated spectra can be equally well described by two simple structural models.
M. Prager, W. Press, A. Heidemann, C. Vettier   +3 more
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Impacts of O2:CH4 ratios and CH4 concentrations on the denitrification and CH4 oxidations of a novel AME-AD system

Environmental Research
Aerobic methane (CH4) oxidation coupled to denitrification (AME-D) is a promising process for the denitrification of low C/N wastewater. Compared with anaerobic denitrifying bacteria, aerobic denitrifying bacteria may enable AME-D have high denitrification ability under aerobic conditions.
Yujing, Fan, Zhiling, Gao, Xueyou, Liang, Chunjing, Liu, Weitao, Zhang, Yufei, Dai, Shicheng, Geng, Miaomiao, Chen, Qing, Yang, Xiang, Li, Jianzhi, Xie   +10 more
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Co-processing CH4 and oxygenates on Mo/H-ZSM-5: 2. CH4–CO2 and CH4–HCOOH mixtures

Physical Chemistry Chemical Physics, 2013
Co-processing of formic acid or carbon dioxide with CH4 (FA/CH4 = 0.01-0.03 and CO2/CH4 = 0.01-0.03) on Mo/H-ZSM-5 catalysts at 950 K with the prospect of kinetically coupling dehydrogenation and deoxygenation cycles results instead in a two-zone, staged bed reactor configuration consisting of upstream oxygenate/CH4 reforming and downstream CH4 ...
Jeremy, Bedard, Do-Young, Hong, Aditya, Bhan   +2 more
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