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Potassium-copper perovskite catalysts for mild temperature diesel soot combustion

Paper ID Volume ID Publish Year Pages File Format Full-Text
39571 45827 2014 8 PDF Available
Title
Potassium-copper perovskite catalysts for mild temperature diesel soot combustion
Abstract

•Potassium-copper perovskite catalysts for soot combustion.•Metal addition method influences the performance of catalysts.•Activity and stability of catalysts are related with ability for NO2 production.•The substituted catalyst (SrKTiCuO3) is the most active and stable.

The activity and stability of potassium-copper perovskite catalysts for soot combustion were analysed at 450 °C in a NOx/O2 gas mixture. Both impregnated (K-Cu/SrTiO3) and substituted (SrKTiCuO3) copper-potassium catalysts were prepared. For comparative purpose, also a potassium substituted catalyst (SrKTiO3) was studied. The high activity of the fresh potassium catalyst (SrKTiO3) is based on the volatile potassium species reaching the surface of soot. However, this catalyst is not useful because potassium is progressively lost during the reaction. Potassium was stabilized by copper and, as a consequence, the two potassium-copper perovskite catalysts present a constant activity for the soot combustion. The activity of the potassium-copper perovskite catalysts, which is maintained during consecutive reactions, is related to their NO2 production capacity. The metal addition method seems to influence the catalysts performance, the substituted catalyst (SrKTiCuO3) being the most active and stable.

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Keywords
Diesel soot combustion; Potassium-copper catalyst; Perovskite
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Potassium-copper perovskite catalysts for mild temperature diesel soot combustion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 485, 5 September 2014, Pages 214–221
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us