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Shock tube study of monomethylamine thermal decomposition and NH 2 high temperature absorption coefficient
Author(s) -
Votsmeier M.,
Song S.,
Davidson D. F.,
Hanson R. K.
Publication year - 1999
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/(sici)1097-4601(1999)31:5<323::aid-kin1>3.0.co;2-x
Subject(s) - chemistry , thermal decomposition , shock tube , tube (container) , thermodynamics , shock (circulatory) , decomposition , absorption (acoustics) , shock wave , organic chemistry , composite material , medicine , physics , materials science
CH 3 NH 2 thermal decomposition is shown to provide a suitable NH 2 radical source for spectroscopic and kinetic shock tube studies. Using this precursor, the absorption coefficient of the NH 2 radical at a detection wavelength of 16739.90 cm −1 has been determined. In the temperature range 1600–2000K the low‐pressure absorption coefficient is described by the polynominal equation: k NH2 =3.953×10 10 / T 3 +7.295×10 5 / T 2 −1.549×10 3 / T [atm −1 cm −1 ] The uncertainty of the determined absorption coefficient is estimated to be ±10%. The rate of the thermal decomposition reaction CH 3 NH 2 +M → CH 3 +NH 2 +M is determined over the temperature range 1550–1900 K and at pressures near 1.6 atm. The rate coefficient was found to be: k 1 =2.51×10 16 exp(−28430/ T ) [cm 3 mol −1 s −1 ] The uncertainty of the determined rate coefficients is estimated to be ±20%. © 1999 John Wiley & Sons, Inc. Int J Chem Kinet 31: 323–330, 1999