矿井乏风低浓度甲烷CuO/Al_2O_3催化燃烧性能研究

Research of catalytic combustion performance of coal mine ventilation air with low concentration methane by CuO/Al_2O_3 catalyst

为了考察矿井乏风低浓度甲烷的催化燃烧性能,以γ-Al2O3为载体,采用等体积浸渍法制备了不同活性组分Cu负载量和添加助剂Fe的CuO/Al2O3催化剂,在固定床反应装置上考察其对低浓度甲烷催化燃烧反应活性。用BET、XRD、H2-TPR对催化剂进行表征,结果表明,CuO/Al2O3催化剂对甲烷高温催化活性随Cu负载量的增加而降低,助剂Fe的加入能够提高CuO在Al2O3载体表面的分散度,负载助剂Fe的CuO-Fe/Al2O3催化剂具有更高的催化活性。Cu负载量为10%时,添加3%的助剂Fe,可使甲烷完全转化温度降低至640℃。

In order to investigate the catalytic combustion performance of coal mine ventilation air with low concentration methane,γ-Al2 O3 catalysts have been prepared with different a-mount of Cu with Fe as promoter supported on CuO/Al2 O3 by using volumetric impregnation method. The catalytic activity of low concentration methane combustion has been investigated in a fixed bed reaction device. The structure of catalysts has been characterized by using BET,XRD and H2-TPR technologies. The results showed that catalytic activity of methane conversion was decrease at high temperature as Cu loading increasing. The degree of CuO dispersion on Al2 O3 support has been increased by loading Fe as promote. The catalyst CuO-Fe/Al2 O3 loading Fe showed higher catalytic activity. The temperature of methane conversion complete to 640 ℃when had 10% Cu amount with 3% Fe as promoter.