Citation: ZHOU Fu-xun, ZHAO Jian-tao, ZHANG Lei, WU Zhi-wei, WANG Jian-guo, FANG Yi-tian, QIN Zhang-feng. Catalytic deoxidization characteristic of oxygen-bearing coal mine methane in the fluidized bed reactor[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(5): 523-529. shu

Catalytic deoxidization characteristic of oxygen-bearing coal mine methane in the fluidized bed reactor

1.
1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

Corresponding author: FANG Yi-tian,
Received Date: 24 December 2012
Available Online: 22 January 2013
Fund Project: 山西省科技重大专项(20111101005)。 (20111101005)

The catalytic deoxygenating experiment of oxygen-bearing coal mine methane (CMM) was carried out in a bench-scale fluidized bed reactor with the spherical Cu-based catalyst. The effects of the bed temperature, the particle size and the space velocity were investigated on the oxygen removal efficiency and CO₂ selectivity. The raising bed temperature could promote the O₂ conversion due to the high activity of the catalyst. The O₂ conversion could reach more than 95% when the temperature was above 450 ℃. The smaller particle size was beneficial to the CO₂ selectivity of the catalyst because of the decreasing inner diffusion resistance. The lower space velocity also could improve the O₂ removal efficiency when the bed temperature was below 450 ℃ although the improvement almost disappears above 450 ℃ due to the increasing catalytic combustion rate. Additionally, by adjusting the CH₄/Air ratio, the catalytic deoxygenation adaptability of the fluidized bed reactor and the catalyst was evaluated for the variable oxygen content in CMM. The results indicate that the process has a perfect oxygen removal performance with the O₂ concentration less than 0.2% and the CO₂ selectivity more than 98% for the O₂ content from 5% to 15% in the simulated CMM.
- coal mine methane,
- fluid bed reactor,
- catalytic combustion,
- deoxidization
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