NOX reduction by urea under lean conditions over single step sol-gel Pt/alumina catalyst

Seker E., Yasyerli N., Gulari E., Lambert C., Hammerle R.

APPLIED CATALYSIS B-ENVIRONMENTAL, vol.37, no.1, pp.27-35, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 1
  • Publication Date: 2002
  • Doi Number: 10.1016/s0926-3373(01)00318-6
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.27-35
  • Keywords: selective NO reduction, platinum/alumina catalyst, sol-gel preparation, urea, NITRIC-OXIDE, SELECTIVE REDUCTION, NITROGEN MONOXIDE, EXHAUST-GAS, OXYGEN, PLATINUM, AMMONIA, COMBUSTION, OXIDATION, PROPENE
  • Gazi University Affiliated: Yes


prepared 2% Pt on alumina catalyst using a single step sol-gel process (designated as 2% Pt-SG) and tested its activity for NO,, reduction with aqueous urea solutions under oxidizing conditions. Our results show that similar to99% NO., conversion was obtained as low as 150 degreesC but above 350 degreesC, the conversion became negative because of the additional formation of NO and NO2 from the oxidation of nitrogen-containing compounds. We also found that NO, conversion activity of 2% Pt-SG is strongly dependent on water content rather than on area amount and the presence of 7% oxygen in the feed lowers the maximum NO, conversion temperature from 250 to 150degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.