Effect of Si/Al ratio on catalytic performance of hydrothermally aged Cu-SSZ-13 for the NH3-SCR of NO in simulated diesel exhaust

被引：95

作者：

Han, Shuai ^{[1
]}

Cheng, Jin ^{[1
]}

Zheng, Changkun ^{[1
]}

Ye, Qing ^{[1
]}

Cheng, Shuiyuan ^{[1
]}

Kang, Tianfang ^{[1
]}

Dai, Hongxing ^{[2
,3
]}

机构：

[1] Beijing Univ Technol, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China

[2] Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Key Lab Beijing Reg Air Pollut Control, Key Lab Adv Funct Mat,Educ Minist China, Beijing 100124, Peoples R China

[3] Beijing Univ Technol, Lab Catalysis Chem & Nanosci, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Beijing 100124, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 419卷

基金：

中国国家自然科学基金;

关键词：

Si/Al ratio; Cu-SSZ-13; Selective catalytic reduction; Ammonia oxidation; Hydrothermal aging treatment; SSZ-13; ZEOLITE; REDUCTION; AMMONIA; NH3; SCR; CU/SAPO-34; OXIDATION; SITES; FTIR; ADSORPTION;

D O I：

10.1016/j.apsusc.2017.04.198

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The hydrothermal stability of the CuSSZ-13 samples with various Si/Al ratios was examined. The NO conversions in the NH3-SCR and NH3 oxidation were measured. Physicochemical properties of the samples were characterized by means of a number of analytical techniques. It is shown that the NH3-SCR activity and hydrothermal stability of the CuSSZ-13 samples decreased with the rise in Si/Al ratio. Such decreases were attributed to the drop in the amount of the isolated Cu2+ in the D6R and CHA cage of the CuSSZ-13 samples. Part of the isolated Cu2+ ions were transformed to CuO after hydrothermal aging treatment, especially in the high-Si/Al-ratio samples. A large amount of the aggregated CuO destroyed the skeleton structure of SSZ-13, leading to the deactivation of the samples. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：382 / 392

页数：11

共 40 条

[1] Recent advances in automotive catalysis for NOx emission control by small-pore microporous materials [J].

Beale, A. M. ;

Gao, F. ;

Lezcano-Gonzalez, I. ;

Peden, C. H. F. ;

Szanyi, J. .

CHEMICAL SOCIETY REVIEWS, 2015, 44 (20) :7371-7405

[2] Probing zeolites by vibrational spectroscopies [J].

Bordiga, Silvia ;

Lamberti, Carlo ;

Bonino, Francesca ;

Travert, Arnaud ;

Thibault-Starzyk, Frederic .

CHEMICAL SOCIETY REVIEWS, 2015, 44 (20) :7262-7341

[3] The State of the Art in Selective Catalytic Reduction of NOx by Ammonia Using Metal-Exchanged Zeolite Catalysts [J].

Brandenberger, Sandro ;

Kroecher, Oliver ;

Tissler, Arno ;

Althoff, Roderik .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 2008, 50 (04) :492-531

[4] Economical Way to Synthesize SSZ-13 with Abundant Ion-Exchanged Cu+ for an Extraordinary Performance in Selective Catalytic Reduction (SCR) of NOx by Ammonia [J].

Chen, Biaohua ;

Xu, Ruinian ;

Zhang, Runduo ;

Liu, Ning .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2014, 48 (23) :13909-13916

[5] Adsorption of NO on Cu exchanged zeolites, an FTIR study: Effects of Cu levels, NO pressure, and catalyst pretreatment [J].

Cheung, T ;

Bhargava, SK ;

Hobday, M ;

Foger, K .

JOURNAL OF CATALYSIS, 1996, 158 (01) :301-310

[6] Confirmation of Isolated Cu2+ Ions in SSZ-13 Zeolite as Active Sites in NH3-Selective Catalytic Reduction [J].

Deka, Upakul ;

Juhin, Amelie ;

Eilertsen, Einar A. ;

Emerich, Hermann ;

Green, Mark A. ;

Korhonen, Satu T. ;

Weckhuysen, Bert M. ;

Beale, Andrew M. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (07) :4809-4818

[7] The ammonia selective catalytic reduction activity of copper-exchanged small-pore zeolites [J].

Fickel, Dustin W. ;

D'Addio, Elizabeth ;

Lauterbach, Jochen A. ;

Lobo, Raul F. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2011, 102 (3-4) :441-448

[8] Effects of Si/Al ratio on Cu/SSZ-13 NH3-SCR catalysts: Implications for the active Cu species and the roles of Bronsted acidity [J].

Gao, Feng ;

Washton, Nancy M. ;

Wang, Yilin ;

Kollar, Marton ;

Szanyi, Janos ;

Peden, Charles H. F. .

JOURNAL OF CATALYSIS, 2015, 331 :25-38

[9] Understanding ammonia selective catalytic reduction kinetics over Cu/SSZ-13 from motion of the Cu ions [J].

Gao, Feng ;

Walter, Eric D. ;

Kollar, Marton ;

Wang, Yilin ;

Szanyi, Janos ;

Peden, Charles H. F. .

JOURNAL OF CATALYSIS, 2014, 319 :1-14

[10] XPS study of the Cu@Cu2O core-shell nanoparticles [J].

Ghodselahi, T. ;

Vesaghi, M. A. ;

Shafiekhani, A. ;

Baghizadeh, A. ;

Lameii, M. .

APPLIED SURFACE SCIENCE, 2008, 255 (05) :2730-2734

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