SCR catalyst having excellent sulfur tolerance
AssigneesPosco Holdings Inc., Research Institute of Industrial Science & Technology, Seoul National University R&Db Foundation
InventorsJoon-Woo Kim, Dong-Jun Koh, Young-Chul Byun, Do-Heui Kim, Jong-Tae Lim, In-Hak Song, Hwang-Ho Lee, Se-Won Jeon
Life of this patent
Estimating the term…
Abstract
Provided is an SCR catalyst for removing nitrogen oxides (NOx) from exhaust gas, comprising: 0.01-70 wt % of zeolite having an average pore size of 5 Å or more; 25-90 wt % of titanium dioxide (TiO2); and 4-10 wt % of vanadium pentoxide (V2O5). The SCR catalyst according to the present invention exhibits denitrification performance in a low-temperature area that is superior to that of a conventional SCR catalyst, has improved tolerance for a sulfur compound, and also has an excellent regeneration rate.
Claims5
A selective catalytic reduction (SCR) catalyst for removing nitrogen oxides from exhaust gas, the SCR catalyst consisting of:
- 20 to 40 weight percentage of zeolite-Y having pores, the pores having an average pore size of 5 Å or more;
- 40 to 70 wt % of titanium dioxide;
- 4 to 10 wt % of vanadium pentoxide;
- and
- 0.01 to 15 wt % of tungsten trioxide,
- wherein the zeolite-Y does not include iron, cobalt, nickel, copper, chromium, zinc, and manganese, and
- wherein a weight ratio of aluminum to silicon of the zeolite-Y is 1:5 to 1:12.
Dependencies are inferred from the claim text.