Interaction of Coal with Sodium Nitrite

A mechanism is proposed for the interaction of coal with paramagnetic nitrogen oxides produced in the decomposition of sodium nitrite. The main role in the self-oxidation of coal is played by quinoid structures with high redox potential. Four basic periods are identified in the thermooxidative trans...

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Bibliographic Details
Published inCoke and chemistry (New York, N.Y.) Vol. 62; no. 3; pp. 83 - 88
Main Authors Miroshnichenko, D. V., Nazarov, V. N.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.03.2019
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Coal
Decomposition reactions
Industrial Chemistry/Chemical Engineering
Nitrogen oxides
Oxidation
Sodium nitrite
flash point
quinoid structures
coal
sodium nitrite
self-oxidation
self-ignition
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Summary:A mechanism is proposed for the interaction of coal with paramagnetic nitrogen oxides produced in the decomposition of sodium nitrite. The main role in the self-oxidation of coal is played by quinoid structures with high redox potential. Four basic periods are identified in the thermooxidative transformation of coal. These periods differ in the rate of the processes, the quantity of gaseous oxidative products, and their composition. The decomposition products of the coal react most vigorously with the oxidant in the fourth period. That leads rapidly to self-heating of the reaction mixture, culminating in explosive gas liberation.
ISSN:1068-364X
1934-8398
DOI:10.3103/S1068364X19030049