One-pot synthesis of Cu-Ce co-doped SAPO-5/34 hybrid crystal structure catalysts for NH_(3)-SCR reaction with SO_(2) resistance  

作　　者：Yuanyuan Ma Zhifang Li Nan Zhao Yanlong Teng 

机构地区：[1]College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China [2]College of Materials Science and Engineering,Qiqihar University,Qiqihar 161006,China [3]Analyzing&Testing Center,Qiqihar University,Qiqihar 161006,China

出　　处：《Journal of Rare Earths》2021年第10期1217-1223,I0002,共8页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (51708309);Natural Science Foundation of Heilongjiang Province;China (QC2017065);the University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province (UNPYSCT-2018106)。

摘　　要：SAPO-34,SAPO-5/34 based catalysts doped with Cu,Ce as active components were synthesized via a one-pot hydrothermal method by using different amounts of additive(a-cellulose),and their catalytic activities were measured for selective catalytic reduction(SCR) of NO with NH3.The synthesized Cu-Ce co-doped products switch from cubic SAPO-34,to flower-like aggregated SAPO-5/34,hybrid crystal SAPO-5/34,and finally to spherical aggregated SAPO-34 with the increase of α-cellulose amount.The Cu-Ce co-doped SAPO-5/34 hybrid crystal structure catalysts with 0.75 mol ratios of C/P(Cu-Ce/SP-0.75)exhibit excellent NH_(3)-SCR activity with higher than 90% NOx conversion in the temperature range of 180-450℃,at WHSV of 20000 mL/(g·h).Furthermore,the catalyst displays outstanding sulfur resistance and NOX conversion maintains above 90% at 200-450℃ after adding 100 ppm of SO_(2).The characteristic results suggest that the high deNOX performance of Cu-Ce/SP-0.75 is due to the enhanced accessibility,abundant activity species,excellent redox property and high adsorptive and activated capacity for NH_(3).

关 键 词：SAPO-5/34 catalysts Selective catalytic reduction Cu-Ce co-modified One-pot synthesis Good resistance to SO_(2) Rare earths 

分 类 号：X734.2[环境科学与工程—环境工程] TQ426[化学工程]