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Influences of Na+ co-cation on the structure and performance of Cu/SSZ-13 selective catalytic reduction catalysts

Journal Article · · Catalysis Today
Here, a series of Cu,H/SSZ-13 and Cu,Na/SSZ-13 catalysts were synthesized, degreened and hydrothermally aged for use in the standard NH3-SCR reaction. Surface area/pore volume and XRD analyses were used to probe the textural properties of the catalysts. H2-TPR and EPR were utilized to quantitatively describe the various Cu species. NH3-SCR was tested at both a lower space velocity to probe the light-off behavior, and at a higher space velocity to generate data for kinetic analysis. Na+ co-cation addition was found to promote turnover rates of isolated Cu-ions at low reaction temperatures. However, this promoting effect is compromised by decreases in Cu exchange capacity and hydrothermal stability of the Cu,Na/SSZ-13 catalysts.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1736020
Alternate ID(s):
OSTI ID: 1636650
Report Number(s):
PNNL-SA--138691
Journal Information:
Catalysis Today, Journal Name: Catalysis Today Vol. 339; ISSN 0920-5861
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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