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Title: Very high pressure combustion; Reaction propagation rates of nitromethane within a diamond anvil cell

Abstract

This paper reports on the combustion-front propagation rate of nitromethane that has been examined to pressures of 40 GPa. A new and general technique involving pulsed laser ignition of an energetic material within a diamond anvil cell and a method for monitoring the rapid decomposition of nitromethane and other explosives to more stable chemical products is described in detail. Nitromethane is shown to exhibit a flame propagation rate that increases smoothly to 100 m/s at 30 GPa as a function of pressure. Above 30 GPa, the final solid-state combustion products change dramatically and the flame propagation rate begins to decrease. The combustion-front propagation rate is analyzed in terms of an existing condensed-phase model that predicts a relationship between the front propagation rate, U, and the pressure derivative of the chemical kinetic activation energy, dE{sub a}/dP, such that a plot of logU{sup 2} vs. P should be linear. The activation energy is analyzed to yield an effective volume of activation, {Delta}V, of {minus}3.4 ml/mol. The chemical kinetic parameters determined from the combustion-front propagation rate analysis of solid high-pressure nitromethane is compared with results from other thermal decomposition studies of this prototypic molecular explosive.

Authors:
;  [1]
  1. Lawrence Livermore National Lab., Livermore, CA (US)
Publication Date:
OSTI Identifier:
5327070
Resource Type:
Journal Article
Journal Name:
Combustion and Flame; (United States)
Additional Journal Information:
Journal Volume: 87:2; Journal ID: ISSN 0010-2180
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; NITROMETHANE; COMBUSTION KINETICS; FLAME PROPAGATION; ACTIVATION ENERGY; ANVIL PROJECT; CHEMICAL REACTION KINETICS; COMBUSTION PRODUCTS; EXPLOSIVES; VERY HIGH PRESSURE; CHEMICAL EXPLOSIVES; ENERGY; EXPLOSIONS; KINETICS; NITRO COMPOUNDS; NUCLEAR EXPLOSIONS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; REACTION KINETICS; 400800* - Combustion, Pyrolysis, & High-Temperature Chemistry; 450100 - Military Technology, Weaponry, & National Defense- Chemical Explosions & Explosives

Citation Formats

Rice, S F, and Foltz, M F. Very high pressure combustion; Reaction propagation rates of nitromethane within a diamond anvil cell. United States: N. p., 1991. Web. doi:10.1016/0010-2180(91)90161-4.
Rice, S F, & Foltz, M F. Very high pressure combustion; Reaction propagation rates of nitromethane within a diamond anvil cell. United States. doi:10.1016/0010-2180(91)90161-4.
Rice, S F, and Foltz, M F. Fri . "Very high pressure combustion; Reaction propagation rates of nitromethane within a diamond anvil cell". United States. doi:10.1016/0010-2180(91)90161-4.
@article{osti_5327070,
title = {Very high pressure combustion; Reaction propagation rates of nitromethane within a diamond anvil cell},
author = {Rice, S F and Foltz, M F},
abstractNote = {This paper reports on the combustion-front propagation rate of nitromethane that has been examined to pressures of 40 GPa. A new and general technique involving pulsed laser ignition of an energetic material within a diamond anvil cell and a method for monitoring the rapid decomposition of nitromethane and other explosives to more stable chemical products is described in detail. Nitromethane is shown to exhibit a flame propagation rate that increases smoothly to 100 m/s at 30 GPa as a function of pressure. Above 30 GPa, the final solid-state combustion products change dramatically and the flame propagation rate begins to decrease. The combustion-front propagation rate is analyzed in terms of an existing condensed-phase model that predicts a relationship between the front propagation rate, U, and the pressure derivative of the chemical kinetic activation energy, dE{sub a}/dP, such that a plot of logU{sup 2} vs. P should be linear. The activation energy is analyzed to yield an effective volume of activation, {Delta}V, of {minus}3.4 ml/mol. The chemical kinetic parameters determined from the combustion-front propagation rate analysis of solid high-pressure nitromethane is compared with results from other thermal decomposition studies of this prototypic molecular explosive.},
doi = {10.1016/0010-2180(91)90161-4},
journal = {Combustion and Flame; (United States)},
issn = {0010-2180},
number = ,
volume = 87:2,
place = {United States},
year = {1991},
month = {11}
}