Honeycomb-structured catalyst for organic substance decomposition and organic substance decomposing apparatus

Patent metadata

Field	Value
Publication number	US-11571683-B2
Application number	US-202017018869-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	May 11, 2018
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

A honeycomb-structured catalyst for decomposing an organic substance, which includes a catalyst particle. The catalyst particle contains a perovskite-type composite oxide represented by A x B y M z O w , where the A contains at least of Ba and Sr, the B contains Zr, the M is at least one of Mn, Co, Ni, and Fe, y+z=1, 1.001≤x≤1.05, 0.05≤z≤0.2, and w is a positive value that satisfies electrical neutrality. The toluene decomposition rate is greater than 90% when toluene is decomposed using the honeycomb-structured catalyst subjected to a heat treatment at 1200° C. for 48 hours and a gas that contains 50 ppm toluene, 80% nitrogen, and 20% oxygen as a volume concentration as a target at a space velocity of 30,000/h and a catalyst temperature of 400° C.

First claim

The invention claimed is:

1. A honeycomb-structured catalyst for decomposing an organic substance, the honeycomb-structured catalyst comprising:
a catalyst particle that contains a perovskite-type composite oxide represented by A x B y M z O w , where the A contains at least one selected from Ba and Sr, the B contains Zr, the M is at least one selected from Mn, Co, Ni, and Fe, y+z=1, 1.001≤x≤1.05, 0.05≤z≤0.2, and w is a positive value that satisfies electrical neutrality, and
a toluene decomposition rate is greater than 90% when toluene is decomposed using the honeycomb-structured catalyst subjected to a heat treatment at 1200° C. for 48 hours and a gas that contains 50 ppm toluene, 80% nitrogen, and 20% oxygen as a volume concentration as a target at a space velocity of 30,000/h and a catalyst temperature of 400° C.

2. The honeycomb-structured catalyst for decomposing an organic substance according to claim 1 , wherein 1.001≤x≥1.005.

3. The honeycomb-structured catalyst for decomposing an organic substance according to claim 1 , wherein the honeycomb-structured catalyst is an extrusion molded catalyst.

4. An organic substance decomposing apparatus comprising a flow path for an organic substance, and the honeycomb-structured catalyst for decomposing an organic substance according to claim 1 .

5. The organic substance decomposing apparatus according to claim 4 , wherein 1.001≤x≥1.005.

6. The organic substance decomposing apparatus according to claim 4 , wherein the honeycomb-structured catalyst is an extrusion molded catalyst.

7. A honeycomb-structured catalyst for decomposing an organic substance, the honeycomb-structured catalyst comprising:
a catalyst particle that contains a perovskite-type composite oxide represented by A x B y M z O w , where the A contains at least one selected from Ba and Sr, the B contains Zr, the M is at least one selected from Mn, Co, Ni, and Fe, y+z=1, 1.001≤x≤1.05, 0.05≤z≤0.2, and w is a positive value that satisfies electrical neutrality, and
when a toluene decomposition rate is regarded as 1 when toluene is decomposed using the honeycomb-structured catalyst before being subjected to a heat treatment at 1200° C. for 48 hours and a gas that contains 50 ppm toluene, 80% nitrogen, and 20% oxygen as a volume concentration as a target at a space velocity of 30,000/h and a catalyst temperature of 400° C., the toluene decomposition rate when using the honeycomb-structured catalyst after being subjected to the heat treatment is greater than 0.935 and smaller than 1.

8. The honeycomb-structured catalyst for decomposing an organic substance according to claim 7 , wherein the x satisfies a relation of x≥1.005.

9. The honeycomb-structured catalyst for decomposing an organic substance according to claim 7 , wherein the honeycomb-structured catalyst is an extrusion molded catalyst.

10. An organic substance decomposing apparatus comprising a flow path for an organic substance, and the honeycomb-structured catalyst for decomposing an organic substance according to claim 7 .

11. The organic substance decomposing apparatus according to claim 10 , wherein 1.001≤x≥1.005.

12. The organic substance decomposing apparatus according to claim 10 , wherein the honeycomb-structured catalyst is an extrusion molded catalyst.

Assignees

• Murata Manufacturing Co

Inventors

• Mori Naoya
• Kuretake Satoshi
• Sugahara Nario
• Ishihara Kentaro

Classifications

• B01J35/55

  Cylinders or rings · CPC title

• B01D2255/2061

  Yttrium · CPC title

• A61L9/00

  Disinfection, sterilisation or deodorisation of air (body deodorants A61Q15/00; purifying air by respirators A62B, A62D9/00; separating dispersed particles from gases or vapours B01D45/00 - B01D51/00, B03C3/00; chemical or biological purification of waste gases B01D53/34; production of ozone C01B13/10; air-conditioning systems incorporating sterilisation F24F3/16, F24F8/20) · CPC title

• B01D2255/104

  Silver · CPC title

• C01P2002/77

  by unit-cell parameters, atom positions or structure diagrams · CPC title