基于過渡金屬氧化物載氧體的煤礦通風瓦斯處理性能

吳舉茂; 蘇慶泉; 武永健; 楊海洋

doi:10.13374/j.issn2095-9389.2017.06.002

基于過渡金屬氧化物載氧體的煤礦通風瓦斯處理性能

doi: 10.13374/j.issn2095-9389.2017.06.002

1) 北京科技大學能源與環境工程學院, 北京 100083
2) 北京科技大學節能與環保北京高校工程研究中心, 北京 100083

基金項目:

北京市科技基金資助項目(Z131100005613045)

詳細信息

中圖分類號: X752
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出版歷程
- 收稿日期: 2016-08-18

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

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

摘要

摘要: 采用反應管對基于過渡金屬氧化物載氧體的煤礦通風瓦斯(VAM)處理性能展開了研究.結果表明,經活化后的三種載氧體均能將CH₄完全轉化為CO₂,其活性順序為CuO60/γ-Al₂O₃ > NiO60/γ-Al₂O₃ > Fe₂O₃60/γ-Al₂O₃;基于CuO60/γ-Al₂O₃的CH₄轉化率隨空速的增加而減小,隨CuO負載量和床層溫度的升高而增大;煤礦通風瓦斯中的CH₄濃度越低,CH₄轉化率達到90%所需的床層溫度就越低;對活性物質低分散高負載的CuO60/γ-Al₂O₃和活性物質高分散低負載的CuO5.5/γ-Al₂O₃兩種CuO/γ-Al₂O₃系載氧體進行了比較,發現兩種載氧體的CH₄轉化機理均包含有化學鏈燃燒和催化燃燒兩種機理,基于催化燃燒機理的CH₄轉化率在一定溫度下存在極大值,當床層溫度高于該極大值溫度時,化學鏈燃燒對CH₄轉化率的貢獻明顯大于催化燃燒對CH₄轉化率的貢獻;相同條件下,CuO5.5/γ-Al₂O₃的初期活性優于Cu60/γ-Al₂O₃,但CuO60/γ-Al₂O₃的活性穩定性優于CuO5.5/γ-Al₂O₃.
- 通風瓦斯 /
- 甲烷轉化率 /
- 載氧體 /
- 化學鏈燃燒 /
- 催化燃燒
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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參考文獻(14)

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