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Cu–Mn bimetal ion-exchanged SAPO-34 as an active SCR catalyst for removal of NOx from diesel engine exhausts

Paper ID Volume ID Publish Year Pages File Format Full-Text
49775 46765 2016 4 PDF Available
Title
Cu–Mn bimetal ion-exchanged SAPO-34 as an active SCR catalyst for removal of NOx from diesel engine exhausts
Abstract

•The co-doping of Cu and Mn can maintain the crystal and physical structure of SAPO-34.•The co-doping of Cu and Mn can increase the exchange amount of Cu and active centers.•The co-doping of Cu and Mn can enhance the acidic strength.•Cu-Mn/SAPO-34 catalyst shows high low-temperature deNOx activity.•Cu-Mn/SAPO-34 shows high hydrothermal stability and resistance to HC.

Mn/SAPO-34, Cu/SAPO-34, and Cu-Mn/SAPO-34 were prepared through ion-exchanged method and used to remove NOx from diesel engine exhausts. The original crystal and physical structure of SAPO-34 is maintained in the catalysts. The ion-exchanged amount of Cu in Cu–Mn/SAPO-34 is higher than that in Cu/SAPO-34, and more Cu+ is formed as active center for low-temperature selective catalytic reduction (SCR). After co-doping of Cu and Mn, the acidic strength of the catalyst increases and formation of NH3NOx surface intermediate species is promoted. Cu–Mn/SAPO-34 exhibits high deNOx activity, hydrothermal stability, and resistance to hydrocarbon (HC).

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Keywords
Diesel engine exhaust; Selective catalytic reduction; Cu–Mn/SAPO-34; Hydrothermal stability; Resistance to HC
First Page Preview
Cu–Mn bimetal ion-exchanged SAPO-34 as an active SCR catalyst for removal of NOx from diesel engine exhausts
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 81, 5 June 2016, Pages 54–57
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis