Efficient synthesis of the Cu-SAPO-44 zeolite with excellent activity for selective catalytic reduction of NOx by NH3

Ying Xin; Nana Zhang; Xiao Wang; Qian Li; Xicheng Ma; Yongxin Qi; Lirong Zheng; James A. Anderson; Zhaoliang Zhang

doi:10.1016/j.cattod.2018.08.018

Efficient synthesis of the Cu-SAPO-44 zeolite with excellent activity for selective catalytic reduction of NO_x by NH₃

Ying Xin^* (Corresponding Author), Nana Zhang, Xiao Wang, Qian Li, Xicheng Ma, Yongxin Qi, Lirong Zheng, James A. Anderson, Zhaoliang Zhang (Corresponding Author)

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

A small-pore Cu-chabazite zeolite, Cu-SAPO-44 was synthesized using a one-pot approach by combination of cyclohexylamine template and copper-amine complex. The Cu-SAPO-44 zeolite obtained exhibits excellent activity over a wide temperature window from 200 to 500 °C for the selective catalytic reduction of NO_x with ammonia (NH₃-SCR). The copper-amine complex allowed direct introduction as well as a high dispersion of extra-framework Cu species in the chabazite structure. In situ X-ray absorption fine structure (XAFS) confirmed the isolated Cu²⁺ ions and Cu²⁺ ↔ Cu⁺ cycle. Temperature-programmed reduction with H₂ (H₂-TPR) and in situ FTIR of CO adsorption demonstrated that a variety of isolated Cu²⁺ ions inside the large cages and in or near the six-membered rings of the chabazite structure are responsible for the wide temperature window of activity. Cu-SAPO-44 has shown to be a promising candidate as a SCR catalyst with great potential in after-treatment systems for either mobile or stationary sources.

Original language	English
Pages (from-to)	35-41
Number of pages	7
Journal	Catalysis Today
Volume	332
Early online date	23 Aug 2018
DOIs	https://doi.org/10.1016/j.cattod.2018.08.018
Publication status	Published - 15 Jul 2019

Keywords

Copper-amine complex
Cu-SAPO-44
Isolated Cuion
Nitrogen oxides
Selective catalytic reduction
X-ray adsorption fine structure
CU/SAPO-34
ALUMINOPHOSPHATE STRUCTURES
PERFORMANCE
NH3-SCR
Isolated Cu2+ ion
COPPER
MOLECULAR-SIEVES
SAPO-44
CHA
IN-SITU XAFS
ACIDITY

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@article{d30c8e40339a484b96281aa966a52375,

title = "Efficient synthesis of the Cu-SAPO-44 zeolite with excellent activity for selective catalytic reduction of NOx by NH3",

abstract = "A small-pore Cu-chabazite zeolite, Cu-SAPO-44 was synthesized using a one-pot approach by combination of cyclohexylamine template and copper-amine complex. The Cu-SAPO-44 zeolite obtained exhibits excellent activity over a wide temperature window from 200 to 500 °C for the selective catalytic reduction of NOx with ammonia (NH3-SCR). The copper-amine complex allowed direct introduction as well as a high dispersion of extra-framework Cu species in the chabazite structure. In situ X-ray absorption fine structure (XAFS) confirmed the isolated Cu2+ ions and Cu2+ ↔ Cu+ cycle. Temperature-programmed reduction with H2 (H2-TPR) and in situ FTIR of CO adsorption demonstrated that a variety of isolated Cu2+ ions inside the large cages and in or near the six-membered rings of the chabazite structure are responsible for the wide temperature window of activity. Cu-SAPO-44 has shown to be a promising candidate as a SCR catalyst with great potential in after-treatment systems for either mobile or stationary sources.",

keywords = "Copper-amine complex, Cu-SAPO-44, Isolated Cuion, Nitrogen oxides, Selective catalytic reduction, X-ray adsorption fine structure, CU/SAPO-34, ALUMINOPHOSPHATE STRUCTURES, PERFORMANCE, NH3-SCR, Isolated Cu2+ ion, COPPER, MOLECULAR-SIEVES, SAPO-44, CHA, IN-SITU XAFS, ACIDITY",

author = "Ying Xin and Nana Zhang and Xiao Wang and Qian Li and Xicheng Ma and Yongxin Qi and Lirong Zheng and Anderson, {James A.} and Zhaoliang Zhang",

note = "This work was supported by National Natural Science Foundation of China (No. 21477046 and 21876061), Key Technology R&D Program of Shandong Province (No. 2016ZDJS11A03) and the State Key Laboratory of Chemical Engineering (CRE-2017-C-304).",

year = "2019",

month = jul,

day = "15",

doi = "10.1016/j.cattod.2018.08.018",

language = "English",

volume = "332",

pages = "35--41",

journal = "Catalysis Today",

issn = "0920-5861",

publisher = "Elsevier",

}

TY - JOUR

T1 - Efficient synthesis of the Cu-SAPO-44 zeolite with excellent activity for selective catalytic reduction of NOx by NH3

AU - Xin, Ying

AU - Zhang, Nana

AU - Wang, Xiao

AU - Li, Qian

AU - Ma, Xicheng

AU - Qi, Yongxin

AU - Zheng, Lirong

AU - Anderson, James A.

AU - Zhang, Zhaoliang

N1 - This work was supported by National Natural Science Foundation of China (No. 21477046 and 21876061), Key Technology R&D Program of Shandong Province (No. 2016ZDJS11A03) and the State Key Laboratory of Chemical Engineering (CRE-2017-C-304).

PY - 2019/7/15

Y1 - 2019/7/15

N2 - A small-pore Cu-chabazite zeolite, Cu-SAPO-44 was synthesized using a one-pot approach by combination of cyclohexylamine template and copper-amine complex. The Cu-SAPO-44 zeolite obtained exhibits excellent activity over a wide temperature window from 200 to 500 °C for the selective catalytic reduction of NOx with ammonia (NH3-SCR). The copper-amine complex allowed direct introduction as well as a high dispersion of extra-framework Cu species in the chabazite structure. In situ X-ray absorption fine structure (XAFS) confirmed the isolated Cu2+ ions and Cu2+ ↔ Cu+ cycle. Temperature-programmed reduction with H2 (H2-TPR) and in situ FTIR of CO adsorption demonstrated that a variety of isolated Cu2+ ions inside the large cages and in or near the six-membered rings of the chabazite structure are responsible for the wide temperature window of activity. Cu-SAPO-44 has shown to be a promising candidate as a SCR catalyst with great potential in after-treatment systems for either mobile or stationary sources.

AB - A small-pore Cu-chabazite zeolite, Cu-SAPO-44 was synthesized using a one-pot approach by combination of cyclohexylamine template and copper-amine complex. The Cu-SAPO-44 zeolite obtained exhibits excellent activity over a wide temperature window from 200 to 500 °C for the selective catalytic reduction of NOx with ammonia (NH3-SCR). The copper-amine complex allowed direct introduction as well as a high dispersion of extra-framework Cu species in the chabazite structure. In situ X-ray absorption fine structure (XAFS) confirmed the isolated Cu2+ ions and Cu2+ ↔ Cu+ cycle. Temperature-programmed reduction with H2 (H2-TPR) and in situ FTIR of CO adsorption demonstrated that a variety of isolated Cu2+ ions inside the large cages and in or near the six-membered rings of the chabazite structure are responsible for the wide temperature window of activity. Cu-SAPO-44 has shown to be a promising candidate as a SCR catalyst with great potential in after-treatment systems for either mobile or stationary sources.

KW - Copper-amine complex

KW - Cu-SAPO-44

KW - Isolated Cuion

KW - Nitrogen oxides

KW - Selective catalytic reduction

KW - X-ray adsorption fine structure

KW - CU/SAPO-34

KW - ALUMINOPHOSPHATE STRUCTURES

KW - PERFORMANCE

KW - NH3-SCR

KW - Isolated Cu2+ ion

KW - COPPER

KW - MOLECULAR-SIEVES

KW - SAPO-44

KW - CHA

KW - IN-SITU XAFS

KW - ACIDITY

UR - http://www.scopus.com/inward/record.url?scp=85054362287&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2018.08.018

DO - 10.1016/j.cattod.2018.08.018

M3 - Article

AN - SCOPUS:85054362287

VL - 332

SP - 35

EP - 41

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

ER -

Efficient synthesis of the Cu-SAPO-44 zeolite with excellent activity for selective catalytic reduction of NO_x by NH₃

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Keywords

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