【摘要】 采用过量浸渍(XS)、等体积浸渍(PV)和半等体积浸渍(HPV)方法,分别制得3种柱状V2O5/AC催化剂,并对其脱硫能力进行评价.结果表明:尽管这3种方法制取的催化剂总w(V2O5)相同(均为0.5%),但V2O5在柱状颗粒中的分布差异却很大;其中半等体积浸渍法制备的催化剂外层w(V2O5)最高,等体积浸渍法的w(V2O5)居中,过量浸渍法的w(V2O5)最低.脱硫前期,催化剂外层的w(V2O5)对脱硫活性的影响很大,外层w(V2O5)高的催化剂脱硫活性较高;脱硫后期,催化剂外层w(V2O5)对脱硫活性的影响变小,而内层w(V2O5)的影响变大,内层w(V2O5)高的催化剂脱硫活性较高.更多还原

【Abstract】 V₂O₅/AC pellets with the same V₂O₅ loading were prepared by an excess solution impregnation（XS）,pore volume impregnation（PV） and half of the pore volume impregnation（HPV）,respectively.Although the total V₂O₅ content of three types of pellets is equal（e.g.all being（0.5%））,the V₂O₅ distribution in the cylindrical pellets are quite different.V₂O₅ content of out surface prepared by HPV is highest in three V₂O₅/AC pellets prepared by different impregnations,and that prepared by XS is lowest and that by PV is medium.S distributions of the three V₂O₅/AC pellets subjected to SO₂ removal for different time.The results show that the one with a high V₂O₅ content in its outer surface shows a high initial SO₂ removal activity,while the one with a high V₂O₅ content in its center shows a high SO₂ removal activity in the later stage.更多还原