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柱状V2O5/AC中V2O5的分布特征对烟气脱硫活性的影响
引用本文:王建成,刘振宇,肖 勇,黄张根. 柱状V2O5/AC中V2O5的分布特征对烟气脱硫活性的影响[J]. 环境科学研究, 2008, 21(3): 160-164
作者姓名:王建成  刘振宇  肖 勇  黄张根
作者单位:1.中国科学院 山西煤炭化学研究所,煤转化国家重点实验室,山西 太原 030001;中国科学院 研究生院,北京 100039
基金项目:国家自然科学基金 , 国家高技术研究发展计划(863计划)
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. 

关 键 词:柱状 V2O5/AC   V2O5分布   脱硫
文章编号:1001-6929(2008)03-0160-05
收稿时间:2007-09-28
修稿时间:2007-09-28

V2O5 Distribution in Cylindrical V2O5/AC Pellets and Its Effect on SO2 Removal from Flue Gas
WANG Jian-cheng,LIU Zhen-yu,XIAO Yong and HUANG Zhang-gen. V2O5 Distribution in Cylindrical V2O5/AC Pellets and Its Effect on SO2 Removal from Flue Gas[J]. Research of Environmental Sciences, 2008, 21(3): 160-164
Authors:WANG Jian-cheng  LIU Zhen-yu  XIAO Yong  HUANG Zhang-gen
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 threetypes 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, andthat 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. 
Keywords:cylindrical V-2O-5/AC   V2O5 distribution   SO2 removal
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