Co掺入对CeMoO_x/Al_2O_3协同催化NO、CO和C_3H_8的影响  

Effect of cobalt modification on CeMoO_x/Al_2O_3 for CO,NO and C_3H_8 elimination

作　　者：眭国荣[1,2] 金奇杰 王红[2,3] 沈岳松 祝社民[1,3,4] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京工业大学2011学院,江苏南京211800 [3]南京工业大学江苏先进无机功能复合材料协同创新中心,江苏南京211800 [4]南京工业大学江苏先进生物与化学制造协同创新中心,江苏南京211800

出　　处：《南京工业大学学报（自然科学版）》2017年第6期1-6,31,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点研发计划(2016YFC0205500);国家自然科学基金(51772149);江苏高校优势学科建设工程(PAPD)

摘　　要：采用挤出成型法将Co掺入CeMo_(0.15)O_x/Al_2O_3制备系列催化剂CeMo_(0.15)Co_(0.15)O_x/Al_2O_3,研究Co掺入对协同催化脱除CO、NO和C_3H_8的影响。采用X线衍射仪(XRD)、N2吸附/脱附法、NH3程序升温脱附法(NH_3-TPD)、NO程序升温脱附法(NO-TPD)、H_2程序升温还原法(H_2-TPR)和X线光电子能谱(XPS)等手段对催化剂进行表征。结果表明:Co掺入有利于CeMo_(0.15)O_x/Al_2O_3氧化CO和C_3H_8,CeMo_(0.15)Co_(0.15)O_x/Al_2O_3在空速7 200 h^(-1)条件下,NO的转化率为98.85%,CO的转化率为79.41%,C_3H_8的转化率为81.33%。催化剂中Co的掺入会提高氧化-还原性能、酸量、NO吸附-脱附能力、Ce^(3+)浓度以及化学吸附氧浓度。这些结果均有利于提高协同催化脱除CO、NO和C_3H_8的活性。A series CeMo_（0.15）Co_（0.15）O_x/Al_2O_3 catalysts were modified from CeMo_（0.15）O_x/Al_2O_3 with Co using an extrusion method.The catalytic activity of the obtained catalysts in the CO,NO and C_3H_8 elimination was investigated to determine the appropriate dosage.The samples were characterized by X-ray diffractometer（XRD）,N_2 adsorption/desorption,NH_3 temperature programmed desorption（NH_3-TPD）,NO temperature programmed desorption（NO-TPD）,H_2 temperature programmed reduction（H_2-TPR）and X-ray photoelectron spectroscope（XPS）,respectively.Results showed that CeMo_（0.15）O_x/Al_2O_3 with doped Co favoured catalytic oxidation of CO and C_3H_8 with 98.85% NO,79.41% CO and 81.33% C_3H_8 conversion rate under gas hourly space velocity（GHSV） of 7 200 h-1.It was found that the redox properties,the number of acid sites,the adsorption ability of NO,the concentration of Ce^（3＋）,and chemisorbed oxygen could be enhanced by CeMo_（0.15）O_x/Al_2O_3 with the addition of Co.These results were beneficial for the catalytic removal of CO,NO and C_3H_8.

关 键 词：CeO2/Al2O3 柴油机尾气 NO 催化脱除 

分 类 号：X701.3[环境科学与工程—环境工程]