Kinetics of pyrolysis of a coal model compound, 2-picoline, the nitrogen heteroaromatic analog of toluene. 1. Product distributions

The pyrolysis of 2-picoline in dilute mixtures with argon has been investigated using the single-pulse shock tube and was found to decompose over the temperature range 1300-1550 K, at an average residence time of 800 [mu]s and uniform pressure of 14-16 atm. The major products observed were acetylene...

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Bibliographic Details
Published in:Journal of physical chemistry (1952) 1992-12, Vol.96 (25), p.10334-10339
Main Authors: Terentis, Andrew, Doughty, Alan, Mackie, John C
Format: Article
Language:English
Subjects:
01 COAL, LIGNITE, AND PEAT
010900 > Coal, Lignite, & Peat-- Environmental Aspects
400800 > Combustion, Pyrolysis, & High-Temperature Chemistry
ACETYLENE
ALKANES
ALKYNES
AZINES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
CYANIDES
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROCYANIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
KINETICS
MAGNETIC RESONANCE
MATERIALS
METHANE
NONMETALS
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDATION
PICOLINES
PYRIDINES
PYROLYSIS
PYROLYSIS PRODUCTS
REACTION KINETICS
RESONANCE
THERMOCHEMICAL PROCESSES 014000 > Coal, Lignite, & Peat-- Combustion
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Summary:The pyrolysis of 2-picoline in dilute mixtures with argon has been investigated using the single-pulse shock tube and was found to decompose over the temperature range 1300-1550 K, at an average residence time of 800 [mu]s and uniform pressure of 14-16 atm. The major products observed were acetylene, methane, hydrogen, HCN, and cyanoacetylene. Over the studied range of mixture compositions (0.06-0.20 mol % of 2-picoline) the overall rate of disappearance of 2-picoline obeyed first-order kinetics. Arrhenius parameters for disappearance of picoline were found to be A[sub dis] = 10[sup 17.4+-1.1]s[sup [minus]1] and E[sub a,dis] = 98 [+-] 7 kcal mol[sup [minus]]. From the distribution of observed products it is concluded that the principal initiation reactions were analogous to those known to occur in toluene, the hydrocarbon analogue of 2-picoline, and were found to be C-C bond fission to yield the o-pyridyl and methyl radicals and C-H fission to yield H atoms and 2-picolyl, the N-containing analogue of benzyl. 28 refs., 11 figs.
ISSN:0022-3654
1541-5740
DOI:10.1021/j100204a044