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NUMERICAL SIMULATION AND EXPERIMENTAL STUDY ON FORMATION OF HIGH CONCENTRATION OF H2 GENERATED BY GAS EXPLOSION

Abstract

In coal mine fire rescues, if the abnormal increase of gas concentration occurs, it is the primary thing to analyze the reasons and identify sources of the abnormal forming, which is also the basis of judge the combustion state of fire area and formulate proper fire reliefs. Nowadays, related researches have recognized the methane explosion as the source of high concentration of H2 formation, but there are few studies about the conditions and reaction mechanism of gas explosion generating high concentration of H2. Therefore, this paper uses the chemical kinetic calculation software, ChemKin, and the 20L spherical explosion experimental device to simulate the generating process and formation conditions of H2 in gas explosion. The experimental results show that: the decomposition of water vapor is the main base element reaction (R84) which leads to the generation of H2. The free radical H is the key factor to influence the formation of H2 generated from gas explosion. With the gradual increase of gas explosion concentration, the explosive reaction becomes more incomplete, and then the generating quantity of H2 increases gradually. Experimental results of 20L spherical explosion are consistent with the change trend about simulation results, which verifies the accuracy of simulation analysis. The results of explosion experiments show that when gas concentration is higher than 9%, the incomplete reaction of methane explosion increases which leads to the gradual increase of H2 formation. 

Keywords:

gas explosion, high concentration of H2, numerical simulation, explosion experiment

Details

Issue
Vol. 23 No. S1(91) (2016)
Section
Latest Articles
Published
16-11-2016
DOI:
https://doi.org/10.1515/pomr-2016-0057
Licencja:
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Open Access License

This journal provides immediate open access to its content under the Creative Commons BY 4.0 license. Authors who publish with this journal retain all copyrights and agree to the terms of the CC BY 4.0 license.

 

Authors

  • Baiwei Lei

    China University of Mining & Technology (Beijing), Faculty of Resources and Safety Engineering
  • Bing Wu

    China University of Mining & Technology (Beijing), Faculty of Resources and Safety Engineering
  • Yatong Zhao

    China University of Mining & Technology (Beijing), Faculty of Resources and Safety Engineering
  • Muhammad Aqeel Ashraf

    University Malaysia Sabah, Faculty of Science and Natural Resources

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