<abstract xmlns="http://www.w3.org/1999/xhtml"> 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.</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.

Numerical Simulation and Experimental Study on Formation of High Concentration of H2 Generated by Gas Explosion

Faculty of Resources and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 10083,

Faculty of Science and Natural Resources, University Malaysia Sabah 88400 Kota Kinabalu Sabah,

Polish Maritime Research

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

Numerical Simulation and Experimental Study on Formation of High Concentration of H Generated by Gas Explosion

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...

Numerical Simulation and Experimental Study on Formation of High Concentration of H₂ Generated by Gas Explosion

Published Online: Nov 16, 2016

Page range: 131 - 137

DOI: https://doi.org/10.1515/pomr-2016-0057

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

© 2016

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

Numerical Simulation and Experimental Study on Formation of High Concentration of H2 Generated by Gas Explosion

Published Online: Nov 16, 2016

Page range: 131 - 137

DOI: https://doi.org/10.1515/pomr-2016-0057

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

© 2016

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

Numerical Simulation and Experimental Study on Formation of High Concentration of H₂ Generated by Gas Explosion

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