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In this paper, a heteropolyacid catalyst VPO-Cr-PEG/TiO2 was developed and the low temperature de-NOx performance of catalyst was studied. The experimental results showed that the de-NOx efficiency reached over 98% at the low temperature of 150–350 °C. The catalyst exhibited excellent sulfur and water resistance in the presence of 1000 ppm SO2 and 8 vol% H2O. In the presence of polyethylene glycol (PEG), the crystal surface energy of the catalyst decreased, and (VO)2P2O7 was the main active crystal phase of the catalyst. The selective catalytic reduction of NOx by NH3 over VP(1/5)O-Cr-PEG/TiO2 catalyst simultaneously followed the Langmuir-Hinshelwood and Eley-Rideal mechanisms.

Abstract: The formation of dispersed VPO phases on a lignocellulosic-based activated carbon results in a catalyst that is selective for the partial oxidation of propane, and stable under oxidizing conditions. The use of a stable activated carbon as a catalytic support for active VOx species during the partial oxidation of propane is described for the first time. [Copyright &y& Elsevier]

In this paper, a heteropolyacid catalyst VPO-Cr-PEG/TiO 2 was developed and the low temperature de-NO x performance of catalyst was studied. The experimental results showed that the de-NO x efficiency reached over 98% at the low temperature of 150–350 °C. The catalyst exhibited excellent sulfur and water resistance in the presence of 1000 ppm SO 2 and 8 vol% H 2 O. In the presence of polyethylene glycol (PEG), the crystal surface energy of the catalyst decreased, and (VO) 2 P 2 O 7 was the main active crystal phase of the catalyst. The selective catalytic reduction of NO x by NH 3 over VP(1/5)O-Cr-PEG/TiO 2 catalyst simultaneously followed the Langmuir-Hinshelwood and Eley-Rideal mechanisms. [Display omitted] • The heteropolyacid catalyst VPO-Cr-PEG/TiO 2 for NH 3 -SCR was developed. • The addition of PEG increased the crystallinity of VPO. • VP(1/5)O-Cr-PEG/TiO 2 showed good resistance to SO 2 & H 2 O. [ABSTRACT FROM AUTHOR]