中文摘要：

利用固定床反应器研究了模拟烟气（N2、SO2、O2）气氛下,气态Hg0在V2O5/AC催化剂上的吸附脱除行为.考察了V2O5担载量、SO2浓度和吸附温度等对V2O5/AC吸附脱除Hg0的影响,并对V2O5/AC上吸附汞的形态进行了XPS分析表征.研究发现,V2O5/AC对Hg0的吸附能力远大于载体AC.汞的吸附量与V2O5/AC中V2O5的质量分数有关,随着V2O5质量分数从0.5%增加到1.0%,汞的吸附量从75.9μg·g^-1增加到89.6μg·g^-1（无氧）和115.9μg·g^-1增加到185.5μg·g^-1（有氧）,远高于相同吸附条件下的AC上的汞吸附量（9.6μg·g^-1和23.3μg·g^-1）.SO2对Hg0的吸附有促进作用,主要是由于SO2和Hg^0在V2O5/AC上发生了化学反应.但是当SO2体积分数从500×10^-6增加到2 000×10^-6时,V2O5/AC对汞的吸附量只增加了5%.不同温度下的实验结果表明,V2O5/AC催化剂在150℃左右的吸附脱除Hg0的能力最高,汞的吸附量达到98.5μg·g^-1（无氧）和187.7μg·g^-1（有氧）.XPS分析结果表明,在V2O5/AC催化剂表面有HgO和HgSO4生成，证实了V2O5和SO2的作用．

英文摘要：

The adsorption and removal behaviors of gas-phase Hg^0 over V： 05/AC and AC were studied under a simulated flue gas （containing N2, SO2, 02 ） in a fixed-bed reactor. The influences of the V2O5 loading, SO2 concentration and adsorption temperature on Hg^0 adsorption were investigated. The speciation of mercury adsorbed was determined by X-ray photoelectron spectroscopy （XPS）. It was found that the V2O5/ AC catalyst has a much higher capability than AC for Hg^0 adsorption and removal, mainly because of the catalytic oxidation activity of V2O5 . The Hg^0 adsorption capability depends on the V2O5 content of the V2O5/AC catalyst. The amounts of mercury adsorbed increase from 75.9 μg·g^-1 to 89.6μg·g^-1 （in the absence of 02） and from 115.9 μg·g^-1 to 185.5μg·g^-1 （in the presence of O2） as the V2O5 loading increases from 0.5% to 1.0% ,which are much higher than those over AC under the same conditions （9.6μg·g^-1 and 23.3 μg·g^-1）. SO2 in the flue gas enhances Hg^0 adsorption over the V2O5/AC catalyst, which is due to the reaction of SO2 and Hg^0 on V2O5/AC. But as the SO2 concentration increases from 500 × 10^-6 to 2 000 ×10^-6 , the amount of mercury adsorbed has only a slight increase. The optimal temperature for Hg^0 adsorption over the V2O5/AC catalyst is around 150μ℃, at which the amounts of mercury adsorbed are up to 98.μg·g^-1（in the absence of 02 ） and 187.7 μg·g^-1 （in the presence of O2 ） . The XPS results indicate the formation of HgO and HgSO4 on the surface of the V2 O5/AC catalyst, which confirms the role of V2O5 and SO2 .