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    • Study on the Effects of Hydrothermal Aging Temperatures and Hours on the Performance and Physicochemical Properties of Cu-SSZ-13 Zeolite Catalyst
    DOI：10.13949/j.cnki.nrjgc.2022.04.012
    Key Words:zeolite  hydrothermal aging  redox performance  selective catalytic reduction（SCR）
    Author NameAffiliationE-mail
    WEI Yanfei* Key Laboratory of Power Machinery and Engineering， Shanghai Jiao Tong University， Shanghai 200240， China weiyanfei@sjtu.edu.cn 
    GUAN Bin* Key Laboratory of Power Machinery and Engineering， Shanghai Jiao Tong University， Shanghai 200240， China guanbin@sjtu.edu.cn 
    WU Xingze Key Laboratory of Power Machinery and Engineering， Shanghai Jiao Tong University， Shanghai 200240， China  
    LIU Ziqian Key Laboratory of Power Machinery and Engineering， Shanghai Jiao Tong University， Shanghai 200240， China  
    LIN He Key Laboratory of Power Machinery and Engineering， Shanghai Jiao Tong University， Shanghai 200240， China  
    HUANG Zhen Key Laboratory of Power Machinery and Engineering， Shanghai Jiao Tong University， Shanghai 200240， China  
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    Abstract:Cu-SSZ-13 zeolite catalysts with excellent catalytic activity were synthesized by ion-exchange method and subjected to hydrothermal aging at different temperatures and durations， respectively. The NOx catalytic performance and NH3 adsorption performance of the catalysts under different aging conditions were compared， and the pore properties of these catalysts were also investigated by the Brunauer–Emmett–Teller（BET） method， X-ray diffraction（XRD） and H2 temperature programmed reduction（TPR） to investigate the pore properties， crystal structure and the number distribution of copper sites of these catalysts. Test results show that hydrothermal aging causes an overall decrease in catalytic activity and catalytic temperature window range， as well as a decrease in gas adsorption performance and a significant change in redox performance. Further studies reveal that hydrothermal aging causes the destruction of crystal structure and pore structure， and leads to the transformation and loss of a large number of active sites. The Cu-SSZ-13 zeolite catalysts have good durability in general and are more sensitive to aging temperature than aging time.
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