Performance of ventilation air methane combustion over transition metal oxide oxygen carriers

WU Ju-mao; SU Qing-quan; WU Yong-jian; YANG Hai-yang

doi:10.13374/j.issn2095-9389.2017.06.002

Volume 39 Issue 6

Jun. 2017

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WU Ju-mao, SU Qing-quan, WU Yong-jian, YANG Hai-yang. Performance of ventilation air methane combustion over transition metal oxide oxygen carriers[J]. Chinese Journal of Engineering, 2017, 39(6): 823-829. doi: 10.13374/j.issn2095-9389.2017.06.002

Citation:

WU Ju-mao, SU Qing-quan, WU Yong-jian, YANG Hai-yang. Performance of ventilation air methane combustion over transition metal oxide oxygen carriers[J]. Chinese Journal of Engineering, 2017, 39(6): 823-829. doi: 10.13374/j.issn2095-9389.2017.06.002

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Performance of ventilation air methane combustion over transition metal oxide oxygen carriers

doi: 10.13374/j.issn2095-9389.2017.06.002

1) School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Beijing Higher Institution Engineering Research Center of Energy Conservation and Environmental Protection, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2016-08-18

Abstract

Abstract

The performance of combustion of ventilation air methane (VAM) over transition metal oxide oxygen carriers was studied through experiments with using tube reactors. The results show that the activity of activated oxygen carriers in converting CH₄ to CO₂ is as follows:CuO60/γ-Al₂O₃ > NiO60/γ-Al₂O₃ > Fe₂O₃60/γ-Al₂O₃. CH₄ conversion based on CuO60/γ-Al₂O₃ decreases with increasing gas hourly space velocity, but increases with increasing bed temperature and CuO loading. The lower the initial CH₄ concentration of ventilation air methane, the lower is the temperature for the CH₄ conversion of 90%. There are catalytic combustion mechanisms and chemical-looping combustion mechanisms for CH₄ combustion over both CuO60/γ-Al₂O₃, for which dispersion of the active component is low but loading is high, and CuO5.5/γ-Al₂O₃, for which dispersion of the active component is high but loading is low. There exists a maximum for CH 4 conversion based on the catalytic combustion mechanism at some temperatures, and when the bed temperature is higher than this temperature, the contribution of chemical-looping combustion is greater than that of catalytic combustion. The initial activity of CuO5.5/γ-Al₂O₃ is higher than that of CuO60/γ-Al₂O₃, while the stability of CuO60/γ-Al₂O₃ activity is better than that of CuO5.5/γ-Al₂O₃ activity under the same conditions.
- ventilation air methane,
- methane conversion,
- oxygen carrier,
- chemical-looping combustion,
- catalytic combustion

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References(14)

References

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