Promotional effect of phosphorylation on CeSn0.8W0.6Ox/TiAl0.2Si0.1Oy for NH3-SCR of NO from marine diesel exhaust

Bing HAN, Yuesong SHEN, Shemin ZHU, Youlin LIU, Shubao SHEN

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A series of phosphorylation and blank CeSn0.8W0.6Ox/TiAl0.2Si0.1Oy catalysts prepared by extrusion molding were tested for NH3-SCR of NO, and were characterized by techniques of X-ray diffraction (XRD), Brumauer-Emmett-Teller (N2-BET), environmental scanning electron microscope (ESEM), temperature programmed reduction (H2-TPR) and temperature programmed desorption (NH3-TPD). Effects of phosphorylation on catalytic activity and sulfur-resisting performance of the CeSn0.8W0.6Ox/TiAl0.2Si0.1Oy for NH3-SCR of NO were mainly studied. Results showed that the phosphorylation improved the catalytic activity and sulfur-resisting performance in an active temperature window of 300–440 °C, and the phosphorylation catalyst with 0.4 wt.% H3PO4 exhibited the best catalytic performance and the strongest sulfur-resisting performance. Analysis showed that the phosphorylation increased specific surface area, enhanced the surface acidity and improved redox properties.

Original languageEnglish
Pages (from-to)1010-1016
Number of pages7
JournalJournal of Rare Earths
Volume34
Issue number10
DOIs
StatePublished - 1 Oct 2016

Keywords

  • CeSnWO/TiAlSiO
  • NH-SCR
  • NO conversion
  • diesel engine exhaust
  • phosphorylation
  • rare earths
  • sulfur-resisting

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