%0 Journal Article
%T Kinetics of the NH3 and CO2 solid-state reactionat low temperature
%+ Institute of Biomedical Engineering [Oxford] (IBME)
%+ Physique des interactions ioniques et moléculaires (PIIM)
%+ Laboratoire Univers et Particules de Montpellier (LUPM)
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM)
%A Noble, J. A.
%A Theule, P.
%A Duvernay, F.
%A Danger, G.
%A Chiavassa, T.
%A Ghesquiere, P.
%A Mineva, T.
%A Talbi, D.
%< avec comité de lecture
%@ 1439-4235
%J ChemPhysChem
%I Wiley-VCH Verlag
%V 16
%N 43
%P 23604
%8 2014-08-22
%D 2014
%R 10.1039/c4cp02414a
%Z Chemical Sciences/Theoretical and/or physical chemistry
%Z Physics [physics]/Astrophysics [astro-ph]Journal articles
%X Ammonia and carbon dioxide play an important role in both atmospheric and interstellar ice chemistries.This work presents a theoretical and experimental study of the kinetics of the low-temperature NH3 andCO2 solid-state reaction in ice films, the product of which is ammonium carbamate (NH4+NH2COO). Itis a first-order reaction with respect to CO2, with a temperature-dependent rate constant fitted to theArrhenius law in the temperature range 70 K to 90 K, with an activation energy of 5.1 1.6 kJ mol1 anda pre-exponential factor of 0.090.08+1.1 s1. This work helps to determine the rate of removal of CO2and NH3, via their conversion into ammonium carbamate, from atmospheric and interstellar ices. Wealso measure first-order desorption energies of 69.0 0.2 kJ mol1 and 76.1 0.1 kJ mol1, assuminga pre-exponential factor of 1013 s1, for ammonium carbamate and carbamic acid, respectively.
%G English
%L hal-01082379
%U https://hal.science/hal-01082379
%~ IN2P3
%~ CNRS
%~ UNIV-AMU
%~ UNIV-MONTP1
%~ UNIV-MONTP2
%~ ENSC-MONTPELLIER
%~ ICG
%~ LUPM
%~ PIIM
%~ INC-CNRS
%~ MIPS
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ LUPM_AS
%~ UM1-UM2
%~ TEST2-HALCNRS