CuCoCe-LDH催化剂的C_(3)H_(6)-SCR脱硝特性  

C_(3)H_(6)-SCR denitration characteristics of CuCoCe-LDH catalysts

作　　者：陈佳音 宁淑英 付维 蔡晨 周皞[2] 苏亚欣[1] CHEN Jiayin;NING Shuying;FU Wei;CAI Chen;ZHOU Hao;SU Yaxin(School of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Changzhou Vocational Institute of Engineering,Changzhou 213164,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]常州工程职业技术学院,江苏常州213164

出　　处：《燃料化学学报（中英文）》2024年第3期373-383,共11页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(52276103)资助。

摘　　要：采用水热法一步合成一系列的Cu_((x))Co_((y))Ce_((z))-LDH前驱体,煅烧后形成Cu_((x))Co_((y))Ce_((z))O混合金属氧化物催化剂,在固定床微反应器上实验研究了其C3H6选择性催化还原NO的性能(C_(3)H_(6)-SCR)。得益于Cu、Co、Ce之间强大的协同作用,Cu((0.21))Co((0.48))Ce((0.31))O在225℃时达到95%的NO转化率和90%的N_(2)选择性。此外,运用ICP、XRD、TEM、XPS、H_(2)-TPR等表征来研究其物理化学性质和催化还原能力之间的关系。XRD结果表明,Cu、Co、Ce之间形成了固溶体,促进了活性金属的分散。XPS和H_(2)-TPR进一步证明Cu和Co之间发生了氧化还原反应,促进氧空位的形成,从而提升其催化还原性能。A series of Cu_((x))Co_((y))Ce_((z))-LDH precursors were synthesized by one-step hydrothermal method,and Cu_((x))Co_((y))Ce_((z))O mixed metal oxide catalysts were prepared after calcination and used to study the selective catalytic reduction of NO by C_(3)H_(6)(C_(3)H_(6)-SCR)with a fixed bed micro-reactor.Due to the strong synergy between Cu,Co and Ce,Cu(0.21)Co(0.48)Ce(0.31)O achieves 95%NO conversion and 90% N_(2) selectivity at 225℃.In addition,ICP,XRD,TEM,XPS,H_(2)-TPR were used to characterize the basic physical-chemical properties of the catalysts to investigate the relationship between physicochemical properties and catalytic reduction abilities.XRD results show that solid solutions are formed between Cu,Co and Ce,which promotes the dispersion of active metals.XPS and H_(2)-TPR further demonstrate that redox reactions occur between Cu and Co,promoting the formation of oxygen vacancies,thereby improving their catalytic reduction capacity.

关 键 词：氮氧化物 选择性催化还原 C_(3)H_(6) CuCoCe-LDH催化剂 水热法 

分 类 号：X511[环境科学与工程—环境工程]