Catalyst for organic substance decomposition and organic substance decomposing apparatus

Patent metadata

Field	Value
Publication number	US-11383226-B2
Application number	US-202017018666-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	May 11, 2018
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

A catalyst for decomposing an organic substance, the catalyst having a body which has a plurality of pores and the body 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, 1.001≤x≤1.1, 0.05≤z≤0.2, y+z=1, and w is a positive value that satisfies electrical neutrality. The average pore diameter of the plurality of pores is 49 nm to 260 nm and the pore volume of each of the plurality of pores is 0.08 cm 3 /g to 0.37 cm 3 /g.

First claim

The invention claimed is:

1. A catalyst for decomposing an organic substance, the catalyst comprising a body having a plurality of pores, the body containing a perovskite composite oxide represented by A x B y M z O w , where
the A is at least one selected from Ba and Sr,
the B is Zr,
the M is at least one selected from Mn, Co, Ni, and Fe,
1.001≤x≤1.1,
0.05≤z≤0.2,
y+z=1,
w is a positive value that satisfies electrical neutrality, and
an average pore diameter of the plurality of pores is 49 nm to 260 nm and a pore volume of each of the plurality of pores is 0.08 cm 3 /g to 0.37 cm 3 /g.

2. The catalyst for decomposing an organic substance according to claim 1 , wherein an organic substance decomposition rate after the catalyst is subjected to a heat treatment at 1400° C. for 3 hours is greater than 0.97 when the organic substance decomposition rate before the heat treatment is regarded as 1.

3. The catalyst for decomposing an organic substance according to claim 1 , wherein 1.001≤x≤1.05.

4. The catalyst for decomposing an organic substance according to claim 1 , wherein the pore volume is 0.10 cm 3 /g to 0.37 cm 3 /g.

5. The catalyst for decomposing an organic substance according to claim 1 , wherein the average pore diameter is 150 nm to 260 nm, and the pore volume is 0.21 cm 3 /g to 0.37 cm 3 /g.

6. An organic substance decomposing apparatus comprising a flow path for an organic substance, and the catalyst for decomposing an organic substance according to claim 1 within the flow path.

7. The organic substance decomposing apparatus according to claim 6 , wherein an organic substance decomposition rate of the catalyst after the catalyst is subjected to a heat treatment at 1400° C. for 3 hours is greater than 0.97 when the organic substance decomposition rate before the heat treatment is regarded as 1.

8. The organic substance decomposing apparatus according to claim 6 , wherein 1.001≤x≤1.05.

9. The organic substance decomposing apparatus according to claim 6 , wherein the pore volume is 0.10 cm 3 /g to 0.37 cm 3 /g.

10. The organic substance decomposing apparatus according to claim 6 , wherein the average pore diameter is 150 nm to 260 nm and the pore volume is 0.21 cm 3 /g to 0.37 cm 3 /g.

Assignees

• Murata Manufacturing Co

Inventors

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

Classifications

• B01J35/55

  Cylinders or rings · CPC title

• C01G45/1207

  Permanganates ([MnO4)-] or manganates ([MnO4)2-] · CPC title

• B01J21/16

  Clays or other mineral silicates · CPC title

• B01J21/066

  Zirconium or hafnium; Oxides or hydroxides thereof · CPC title

• B01D53/865

  characterised by a specific catalyst · CPC title