利用固定床反应器在模拟烟气条件下研究凹凸棒石天然吸附剂对单质汞的脱除能力，并利用金属氧化物MnO2和 Co3O4对凹凸棒石进行改性，制备出金属氧化物改性的矿物吸附剂，研究了烟气组分对改性吸附剂脱汞效果的影响．结果表明，MnO2和 Co3O4改性后的凹凸棒石极大地提高了脱汞效率，由原来的12.2%分别提高到了87.9%和84.1%；O2和HCl促进单质汞的脱除，氧气体积分数为4%时，其脱汞率分别提高至92.1%和88.1%，HCl体积分数为10×10-6时，脱汞率分别提高至90.1%和90.7%；SO2和NO竞争吸附降低单质汞的脱除效率，SO2体积分数为400×10-6时，MnO2和Co3,O4改性后的凹凸棒石其脱汞率分别降至84.7%和64.5%，NO体积分数为50×10-6时，其脱汞率分别降至86.1%和81%．%Attapulgite sorbent was tested in a fixed-bed reactor system to evaluate its mercury removal performance from simulated flue gas. The sorbent was modified by MnO2 and Co3O4 respectively to promote its ability of mercury removal. The characterization of the sorbent was analyzed using accelerated surface area porosity and X-ray diffrac-tion(XRD). The Hg0 concentrations were detected using VM3000 online mercury analyzer. The effect of fuel gas components was tested. The result shows that the sorbent modified by MnO2 and Co3O4 can promote mercury removal obviously from 12.2% to 87.9% and 84.1% respectively;that 4% of O2 can promote Hg0 removal efficiency to 92.1%and 88.1%,that 10×10-6 of HCl can promote Hg0 removal efficiency to 90.1% and 90.7%,that 400×10-6 of SO2may decrease Hg0 removal efficiency to 84.7% and 64.5% respectively,and that 50×10-6 of NO may decrease Hg0 removal efficiency to 86.1% and 81% respectively.
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