Structures and catalytic performances of Me/SAPO-34(Me=Mn,Ni,Co)catalysts for low-tem perature SCR of NO_x by ammonia

查看全文 作　　者：Xuesong [1,2,3]Liu;Zhiming [1]Sui;Hongfeng [4]Chen;Yong [3]Chen;Haigang [5]Liu;Peng [1]Jiang;Zhongyun [4]Shen;Wensheng [1]Linghu;Xiaodong [2]Wu

机构地区：[1]College of Chemistry and Chemical Engineering,Shaoxing University,Shaoxing 312000,China;[2]Key Laboratory of Advanced Materials of Ministry of Education,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;[3]Zhejiang Hailiang Eco.Mater.Co.,Ltd.,Zhuji 311814,China;[4]Shaoxing Testing Institute of Quality and Technical Supervision,Shaoxing 312000,China;[5]Chemical Design and Research Institute of Qinghai Province,Xining 810008,China

出　　处：《Journal of Environmental Sciences》索引2021年第33卷第6期,共13页

基　　金：supported by the National Natural Science Foundation of China(No.51702215);the Science and Technology Department of Zhejiang Province(Nos.LGG19B070002,2020C01134);the Science and Technology Program of Shaoxing(No.2017B70051);Shaoxing University(No.2016LG1001);National Training Programs of Innovation and Entrepreneurship for Undergraduates(No.202010349023);the Key Innovation Project of Qinghai Provincial Science and Technology Department(No.2016-GX-116);the National Key R&D Program of China(No.2017YFC0211202)。 摘　　要：Me/SAPO-34(Me=Mn,Ni,Co)series of catalysts were prepared by a wetness impregnation method and investigated for the selective catalytic reduction of nitrogen oxides with ammonia(NH 3-SCR).Among them,Mn/SAPO-34 catalyst was found as the most promising candidate based on its superior low-temperature activity.The catalysts were characterized by X-ray diffraction(XRD),transmission electron microscopy images(TEM),nuclear magnetic resonance(NMR),X-ray photoelectron spectroscopy(XPS),temperature programmed reduction and desorption(TPR and TPD),and diffuse reflectance infrared Fourier transformed spectroscopy(DRIFTS)of NH_(3)/NO_(x)adsorption.Mn/SAPO-34 is obviously different from Ni/SAPO-34 and Co/SAPO-34 in the active species state and distribution.Surface MnO_(x)species which play an essential role in NO oxidation and NO_(2)adsorption,act as better active sites than nickel and cobalt mostly in the form of the aluminates and silicates. 关键词：SAPO-34 Transition metals Low-temperature activity Fast SCR Surface species

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Structures and catalytic performances of Me/SAPO-34(Me=Mn,Ni,Co)catalysts for low-tem perature SCR of NO_x by ammonia

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