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Inhibitor Influence on the Bistability of a CSTR

Published

Author(s)

Valeri I. Babushok, T Noto, Donald R. Burgess Jr., Anthony P. Hamins, Wing Tsang

Abstract

Methane combustion in a continuously stirred flow tank reactor (CSTR) in the presence and absence of chemical inhibitors such as CF3I, CF3Br, CF3H, and a chemically inert gas with high heat capacity is simulated with the CHEMKIN program. The aim of the work is to determine the differences in results arising from the use of the various inhibitors with the aim of establishing the capability of CSTR experiments to give a rank ordering of suppressant power. The chemical inhibitors have the general tendency to raise the steady-state temperature. A high heat capacity inert gas leads to the opposite effect. Only near extinction and self-ignition can one obtain a proper scale of flame suppression capability. The curves for combustion efficiency, (CO2/[CO + CO2]), near the extinction point lead to results where the data for the additives all fall within the envelope for stoichiometric methane/air combustion in the extinction region. For self-ignition, the transition from the mushroom to the isola form of the stability curves appears to be another property that is highly sensitive to suppression power. These observations may serve as a basis for testing inhibiiton capabilities.
Citation
Combustion and Flame
Volume
108
Issue
No. 1/2

Keywords

inhibitors, methane, combustion, kinetics, heat transfer, autoignition

Citation

Babushok, V. , Noto, T. , Burgess, D. , Hamins, A. and Tsang, W. (1997), Inhibitor Influence on the Bistability of a CSTR, Combustion and Flame, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909828 (Accessed April 17, 2024)
Created January 1, 1997, Updated February 19, 2017