Numerical simulation and experimental study on formation of high concentration of H2 generated by gas explosion.

• Autorzy: Lei B. , Wu B. , Zhao Y. , Ashraf M. A.
• Języki publikacji: EN

Abstrakty

EN

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

Słowa kluczowe

EN

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

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2016
• Tom: S 1
• Strony: 131--137
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Lei B.

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

autor

Wu B.

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

autor

Zhao Y.

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

autor

Ashraf M. A.

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

Bibliografia

• 1. Arenillas, A., Rubiera, F., Pis, J.J. (1999). Simultaneous thermogravimetric–mass spectrometric study on the pyrolysis behavior of different rank coals. Journal of Analytical and Applied Pyrolysi,50(1), 31-46.
• 2. Alberta Mine Safety Association. (2008). British Columbia Mine Rescue Manual. British Columbia: British Columbia Mining and minerals Division.
• 3. Yang, X.M.; Zhao, N.; Bian, Z.C.; Chai, J.Q.; Mi, C. (2015). An Intelligent Storage Determining Method for Inbound Containers in Container Terminals. Journal of Coastal Research, 73, 197-204.
• 4. Baoshan Jia, Haiyan Wen, Yuntao Liang, et al. (2013). Mechanism characteristics of CO2 and N2 inhibiting methane explosions in coal mine roadways. Journal of China Coal Society, 38(03), 361-366.
• 5. Deng, J., Xiao, Y., Li, Q., Lu, J., & Wen, H. (2015). Experimental studies of spontaneous combustion and anaerobic cooling of coal. Fuel, 157, 261-269.
• 6. Fubao Z, Jinhai L I, Yusheng L I U, et al. (2010). Rules of variation in hydrogen during reignition of underground fire zones of spontaneous coal combustion. Mining Science and Technology (China),20(4), 499-503.
• 7. Gregory P. Smith, David M. Golden, Michael Frenklach, Nigel W. Moriarty, Boris Eiteneer, Mikhail Goldenberg, C. Thomas Bowman, Ronald K. Hanson, Soonho Song, William C. Gardiner, Jr., Vitali V. Lissianski, and Zhiwei Qin http://www.me.berkeley.edu/gri_mech/, accessed April 20,2016.
• 8. Grossman, S. L., Davidi, S., Wegener, I., et al. (1996). Explosion risks of bituminous coals in contact with air: Due to molecular hydrogen accumulation in confined spaces (underground mines and ships holds): A hypothesis study. Erdöl, Erdgas, Kohle, 112(7-8), 322-324.
• 9. Handong Liang. (2001). Correlation of outburst events of coal and gas with natural hydrogen gas from coal. Journal of China Coal Society, 26(6), 637-642.
• 10. Jia Yingmei, Liu Zhentang, Wang Congyin, et al. (2009). Experimental Study on Gas Composition After Gas Explosion. Coal Technology, 28(12), 78-81.
• 11. Kim, A. G. (2004). Locating fires in abandoned underground coal mines. International Journal of Coal Geology, 59(1), 49-62.
• 12. Lianhua Dong. (1991).The character of harmful gas and monitoring technology. Shenyang:Northeast institute of technology press
• 13. Lingqi, Z., Xinquan, Z., & Jianguo, X. (2008). Analysis of indicator gas of spontaneous combustion and its optimal selection. Journal of Mining & Safety Engineering, 25(4), 440-443.
• 14. Na Gao, Yansong Zhang, Yiting Hu, et al. (2014). Dynamics analysis of gas explosion chain reaction in restricted space. China Safety Science Journal, 24(1), 60. 69-75.
• 15. Nehemia, V., Davidi, S., Cohen, H. (1999). Emission of hydrogen gas from weathered steam coal piles via formaldehyde as a precursor: I. Oxidative decomposition of formaldehyde catalyzed by coal–batch reactor studies. Fuel, 78(7), 775-780.
• 16. Peng Wei, He Qilin, Ge Xinyu. (2010). Experimental studies on the index gases of spontaneous of coal. Journal of Safety Science and Technology, 6(6), 140-144.
• 17. Shao H, Fubao Z, Kaiyan C, et al. (2014). Study on the Hydrogen Generation Rules of Coal Oxidation at Low Temperature. Journal of Engineering Science & Technology Review, 7(3),499-503.
• 18. Singh, A. K., Singh, R. V. K., Singh, M. P., Chandra, H., & Shukla, N. K. (2007). Mine fire gas indices and their application to Indian underground coal mine fires. International Journal of coal geology, 69(3), 192-204.
• 19. Xiangchun Li,Baisheng Nie,Chunli Yang,et al. (2016). Effect of gas concentration on disastrous gases produced by gas explosion in confined space. China Safety Science Journal, 26(1), 69-75.
• 20. Xinquan Zhou. (2013). Proposals on Improvement of Spontaneous Combustion Prevention and Control in Mining Goaf and Emergency Handling Capacity. Coal Science and Technology.41(9), 151-153.
• 21. Xinquan Zhou., Bing Wu. (1996). Theory of mine fire rescues and applications. Beijing: Coal Mining Industry Press.
• 22. Yuntao Liang, Wen Zeng. (2009). Kinetic simulation of gas explosion and inhibition mechanism in enclosed space. CIESC Journal. 60(7), 1700-1706.