Nitrogen oxide reduction catalyst regenerable at low temperature

Patent metadata

Field	Value
Publication number	US-2020215518-A1
Application number	US-201916354406-A
Country	US
Kind code	A1
Filing date	Mar 15, 2019
Priority date	Jan 4, 2019
Publication date	Jul 9, 2020
Grant date	—

Abstract

Provided is a nitrogen oxide (NO X ) 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.
(M 1 ) X V 2 O X+5   [Chemical Formula 1]
(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.)

(M 2 ) Y VO 4   [Chemical Formula 2]
(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.)

First claim

What is claimed is:

1 . A nitrogen oxide (NO X ) reduction catalyst comprising:
an active site comprising 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.
(M 1 ) X V 2 O X+5   [Chemical Formula 1]

(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.)
(M 2 ) Y VO 4   [Chemical Formula 2]

(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.)

2 . A nitrogen oxide (NO X ) reduction catalyst comprising:
a first active site comprising a metal vanadate expressed by [Chemical Formula 1]; a second active site comprising a metal vanadate expressed by [Chemical Formula 2]; and a support for loading both of the first and second active sites thereon.
(M 1 ) X V 2 O X+5   [Chemical Formula 1]

(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.)
(M 2 ) Y VO 4   [Chemical Formula 2]

(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.)

3 . A nitrogen oxide (NO X ) reduction catalyst configured as a mixture of:
a first catalyst comprising a first active site comprising a metal vanadate expressed by [Chemical Formula 1], and a support for loading the first active site thereon; and a second catalyst comprising a second active site comprising a metal vanadate expressed by [Chemical Formula 2], and a support for loading the second active site thereon.
(M 1 ) X V 2 O X+5   [Chemical Formula 1]

(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.)
(M 2 ) Y VO 4   [Chemical Formula 2]

(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.)

4 . The NO X reduction catalyst of claim 1 , wherein the support comprises oxide of a Group-15 or Group-16 element as a promoter.

5 . The NO X reduction catalyst of claim 4 , wherein the promoter has a composition range of 1 wt % to 5 wt % based on the total weight of the support.

6 . The NO X reduction catalyst of claim 4 , 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.

7 . The NO X reduction catalyst of claim 4 , wherein the Group-15 or Group-16 element comprises at least one selected from the group consisting of or a combination of nitrogen (N), phosphorus (P), sulfur (S), arsenic (As), selenium (Se), antimony (Sb), tellurium (Te), bismuth (Bi), polonium (Po), moscovium (Mc), and livermorium (Lv).

8 . The NO X reduction catalyst of claim 2 , wherein the support comprises oxide of a Group-15 or Group-16 element as a promoter.

9 . The NO X reduction catalyst of claim 8 , wherein the promoter has a composition range of 1 wt % to 5 wt % based on the total weight of the support.

10 . The NO X reduction catalyst of claim 8 , 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.

11 . The NO X reduction catalyst of claim 8 , wherein the Group-15 or Group-16 element comprises at least one selected from the group consisting of or a combination of nitrogen (N), phosphorus (P), sulfur (S), arsenic (As), selenium (Se), antimony (Sb), tellurium (Te), bismuth (Bi), polonium (Po), moscovium (Mc), and livermorium (Lv).

12 . The NO X reduction catalyst of claim 3 , wherein the support comprises oxide of a Group-15 or Group-16 element as a promoter.

13 . The NO X reduction catalyst of claim 12 , wherein the promoter has a composition range of 1 wt % to 5 wt % based on the total weight of the support.

14 . The NO X reduction catalyst of claim 12 , 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.

15 . The NO X reduction catalyst of claim 12 , wherein the Group-15 or Group-16 element comprises at least one selected from the group consisting of or a combination of nitrogen (N), phosphorus (P), sulfur (S), arsenic (As), selenium (Se), antimony (Sb), tellurium (Te), bismuth (Bi), polonium (Po), moscovium (Mc), and livermorium (Lv).

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

17 . The NO X reduction catalyst of claim 1 , wherein the support comprises one of carbon (C), Al 2 O 3 , MgO, ZrO 2 , CeO 2 , TiO 2 , and SiO 2 .

18 . The NO X reduction catalyst of claim 1 , wherein the metal vanadate expressed by [Chemical Formula 1] or the metal vanadate expressed by [Chemical Formula 2] are comprised by 10 −4 parts by weight to 50 parts by weight based on 100 parts by weight of the support.

19 . The NO X reduction catalyst of claim 1 , wherein the support has a porous structure.

Assignees

• Korea Inst Sci & Tech

Inventors

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

Classifications

• B01J27/02 Primary

  Sulfur, selenium or tellurium; Compounds thereof · CPC title

• B01D53/8606

  only one sulfur compound other than sulfur oxides or hydrogen sulfide · CPC title

• B01J27/0573

  Selenium; Compounds thereof · CPC title

• B01D2251/2062

  Ammonia · CPC title

• B01D53/8628

  Processes characterised by a specific catalyst · CPC title