Homogeneity of methane-air mixture in devices for the determination of explosion limits

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00007064%3AK02__%2F20%3AN0000080" target="_blank" >RIV/00007064:K02__/20:N0000080 - isvavai.cz</a>

Result on the web

<a href="https://oar.ptb.de/files/download/5f3e662f4c93901010006dbf" target="_blank" >https://oar.ptb.de/files/download/5f3e662f4c93901010006dbf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Homogeneity of methane-air mixture in devices for the determination of explosion limits

Original language description

The explosion characteristics of flammable gases are dependent on many factors. These factors include, for example, pressure, temperature and initiation energy – all of which can be variable. Their variability depends on the explosion characteristics and the initial conditions. The input parameters must be guaranteed during these tests; if they are not, then the correctness of the measured values cannot be relied upon. One of the parameters influencing the results is the homogeneity of the test mixture. To avoid affecting results, it is necessary to ensure a homogeneous mixture throughout the test apparatus. This contribution describes two approaches to homogenisation of a mixture of flammable gas and air in the determination of explosion concentration limits. In the design of the device, the homogenisation of the mixture was solved by means of a nozzle, which should create sufficient gas flow against the wall of the vessel and through which the mixture should be homogenised. As 100% homogenisation of the mixture was not achieved, a second procedure was proposed consisting of creating an external forced circulation of the mixture, making the mixture blended. This work describes the determination of methane concentration in air at the test facility by GC MS. The result is stratification and homogenisation of the methane-air mixture under the conditions of the above homogenisation procedures, followed by a description of the reliability and the effect on the determination of the explosion concentration limits.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů