fulltext.study @t Gmail

NO selective reduction by hydrogen on potassium titanate supported palladium catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
51957 46860 2008 6 PDF Available
Title
NO selective reduction by hydrogen on potassium titanate supported palladium catalyst
Abstract

Potassium titanate (K2O–6TiO2) nanowires were successfully prepared by alkali treatment of TiO2 (79% anatase, 21% rutile) under autogenous pressure in a Teflon-lined autoclave at 200 °C. After further modification with 1 wt.% Pd by wet impregnation, the calcined and pre-reduced Pd/K2O–6TiO2 catalyst was applied for selective reduction of NOx by H2 (H2–SCR) under lean conditions, together with Pd/Al2O3 and Pd/TiO2 as reference. The reference catalysts exhibited maximum NO conversion of about 50–60% at 100–130 °C, but with low N2 selectivity. The N2 selectivity on Pd/K2O–6TiO2 was considerably high, reaching 80% at maximum, with only 11% conversion of the admixed hydrogen reductant. In situ DRIFT spectroscopy revealed surface-fixed nitrates and Pd-bound NO, but no NHx ad-species. It is concluded, that the beneficial effect of the K2O–6TiO2 support is due mainly to a stabilization of high Pd dispersion with enhanced concentration of Pd0–NO intermediates, and due to support alkalinity, that enhances nitrate fixation.

Keywords
Palladium; Titanate; Hydrogen; NO reduction
First Page Preview
NO selective reduction by hydrogen on potassium titanate supported palladium catalyst
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 9, 15 May 2008, Pages 1827–1832
Authors
, , , , ,
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