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

Patent metadata

Field	Value
Publication number	US-2020406245-A1
Application number	US-202017018869-A
Country	US
Kind code	A1
Filing date	Sep 11, 2020
Priority date	May 11, 2018
Publication date	Dec 31, 2020
Grant date	—

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 AxByMzOw, 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

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

• B01J21/16

  Clays or other mineral silicates · CPC title

• B01D53/865

  characterised by a specific catalyst · CPC title

• B01D2258/01

  Engine exhaust gases · CPC title

• B01J21/04 Primary

  Alumina · CPC title