Nitrogen oxide reduction catalyst regenerable at low temperature

Patent metadata

Field	Value
Publication number	US-11203011-B2
Application number	US-201916354406-A
Country	US
Kind code	B2
Filing date	Mar 15, 2019
Priority date	Jan 4, 2019
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

Provided is a nitrogen oxide (NOX) reduction catalyst including an active site including at least one of a metal vanadate expressed by [Chemical Formula 1] and a metal vanadate expressed by [Chemical Formula 2], and a support for loading the active site thereon.(M1)XV2OX+5  [Chemical Formula 1](where M1 denotes one selected from among manganese (Mn), cobalt (Co), and nickel (Ni), and X denotes a real number having a value between 1 and 3.)(M2)YVO4  [Chemical Formula 2](where M2 denotes one selected from among lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu), and Y denotes a real number having a value between 0.5 and 1.5).

First claim

What is claimed is:

1. A nitrogen oxide (NO X ) reduction catalyst comprising:
a first active site comprising a metal vanadate expressed by Chemical Formula 1
(M 1 ) X V 2 O X+5

where M 1 denotes one selected from among manganese (Mn), cobalt (Co), and nickel (Ni), and X denotes a real number having a value between 1 and 3;
a second active site comprising a metal vanadate expressed by Chemical Formula 2
(M 2 ) Y VO 4

where M 2 denotes one selected from among lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu), and Y denotes a real number having a value between 0.5 and 1.5; and
a support for loading both of the first and second active sites thereon, wherein the support comprises oxide of at least one selected from the group consisting of nitrogen (N), phosphorus (P), sulfur (S), arsenic (As), selenium (Se), antimony (Sb), tellurium (Te), polonium (Po), moscovium (Mc), livermorium (Lv), and any combination thereof, as a promoter.

2. The NO X reduction catalyst of claim 1 , wherein the promoter has a composition range of 1 wt % to 5 wt % based on the total weight of the support.

3. The NO X reduction catalyst of claim 1 , wherein the promoter has a composition range of 0.5 wt % to 3 wt % based on a total weight of the NO X reduction catalyst.

4. The NO X reduction catalyst of claim 1 , wherein at least a part of a surface of the NO X reduction catalyst is sulfated.

5. The NO X reduction catalyst of claim 1 , wherein at least a part of a surface of the NO X reduction catalyst is sulfated and functionalized with SO Y 2− .

Assignees

• Korea Inst Sci & Tech

Inventors

• Kim Jong Sik
• Ha Heon Phil
• Kwon Dong Wook

Classifications

• B01D2255/20707

  Titanium · CPC title

• B01D2255/20753

  Nickel · CPC title

• B01D2255/20746

  Cobalt · CPC title

• B01J23/8472 Primary

  Vanadium · CPC title

• B01D2255/20723

  Vanadium · CPC title