Y_2O_3/AC催化剂的烟气同时脱硫脱硝性能  

Performance of simultaneous denitrification and desulfurization for Y_2O_3/AC catalysts

作　　者：王婷[1,2] 丁林[1] 宋永吉[1] 李翠清[1] 王虹[1] 任晓光[1] WANG Ting DING Lin SONG Yongji LI Cuiqing WANG Hong REN Xiaoguang(Chemical Engineering College, Beijing Institute of Petrochemical Technology, Beijing 102617, China College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]北京石油化工学院化学工程学院,北京102617 [2]北京化工大学化学工程学院,北京100029

出　　处：《环境工程学报》2016年第11期6555-6562,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21076025)

摘　　要：采用等体积浸渍法制备了一系列不同负载量的x%Y_2O_3/AC(x=2、4、6、8和10)同时脱硫脱硝催化剂,以CO为还原气,考察该催化剂同时脱硫脱硝催化活性。采用X射线衍射仪(XRD)、H2-程序升温还原(H2-TPR)、比表面积(BET)对催化剂进行了表征。在不同负载量的催化剂中,6%Y_2O_3/AC表现出较好脱硫脱硝效果,SO_2和NO的T90%分别约为365℃和367℃。经HNO_3预处理过的活性炭载体制备的催化剂脱硝效果明显改善,催化剂预硫化可以显著提高脱硫脱硝活性,在550℃硫化的催化剂效果最好,NO和SO_2的T90%分别约为368和362℃,在380℃时脱硫脱硝率均可达到95%以上。Y_2O_3/ activated carbon（ AC） catalysts were prepared with a variety of load capacities using the incipient wetness impregnation method. The obtained catalyst samples were characterized by X-ray diffraction（ XRD）,H_2-temperature programmed reduction（ TPR）,and the Brunauer-Emmett-Teller（ BET） method. Experiments were conducted for the simultaneous removal of SO_2 and NO over Y_2O_3/ AC catalysts in a fixed bed reactor using CO gas as the reducing agent. That catalyst with 6% Y_2O_3 load capacity showed excellent desulfurization and denitration performances,with NO and SO_2 conversions of 90% being reached at 367 ℃ and 362℃,respectively. Pretreatment of the AC support improved the catalytic activity of the catalyst samples,with the catalyst prepared using HNO_3 pretreatment exhibiting enhanced performance. Prevulcanization also improved catalytic activity. For example,the catalyst prevulcanized at 550 ℃ gave 90% NO and SO_2 conversion at 368 ℃and 362 ℃,respectively,with conversions exceeding 95% at 380 ℃.

关 键 词：同时脱硫脱硝 Y2O3 活性炭 硫化 预处理 

分 类 号：X511[环境科学与工程—环境工程] O463.36[机械工程—光学工程]