Perovskite Catalyst Mn-Co Ratio for Toluene Decomposition

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Solution Overview

Problem

Existing organic substance decomposition catalysts, despite having high activity, still have room for further improvement in terms of activity and decomposition rate.

Innovation Solution

A perovskite-type complex oxide catalyst with a specific composition formula AxByMzOw, where A includes Ba, B includes Zr, M represents Mn and Co, and the composition ratio of Mn to Co is optimized within certain ranges to enhance activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a perovskite-type complex oxide catalyst with Ba and Zr is used, then high activity is achieved, but there is still room to further improve the activity

Engineering Contradiction:

Improvedecomposition rateVSAvoidactivity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies parameter changes by precisely controlling the compositional parameters of the perovskite-type complex oxide. Specifically, it optimizes the ratio of Mn to Co substituents (where 0.100≤z1+z2≤0.200 and 0.25≤z1/(z1+z2)≤0.50) and the A-site occupancy (1.000≤x/(y+z)≤1.050). These parameter optimizations enhance the catalytic activity and achieve higher toluene decomposition rates (99.5% or more) while maintaining stability.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If Mn and Co are used as substitutes for Zr, then catalytic activity is enhanced, but the composition ratio must be precisely controlled to avoid performance degradation

Engineering Contradiction:

Improvedecomposition rateVSAvoidcomposition ratio control

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent defines specific parameter ranges for Mn and Co substitution to optimize performance. The composition is constrained by 0.100≤z1+z2≤0.200 (total substitution level), 0.25≤z1/(z1+z2)≤0.50 (Mn to Co ratio), and 1.000≤x/(y+z)≤1.050 (A-site occupancy). These controlled parameter changes enable precise composition adjustment to achieve high decomposition rates while maintaining catalyst stability.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The optimized catalyst achieves a higher decomposition rate of organic substances, with toluene decomposition rates of 99.5% or more, surpassing the performance of conventional catalysts.

Implementation Method 1

an organic substance decomposition catalyst used for decomposing an organic substance and that contains a perovskite-type complex oxide

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 2

decomposing an organic substance

Methodology Applied

Scientific EffectOxidation: Oxidation

Data Source

PatentUS12296321B2Organic substance decomposition catalyst and organic substance decomposition apparatus

Publication Date: 2025.05.13 MURATA MFG CO LTD

AI summary

An organic substance decomposition catalyst that contains a perovskite-type complex oxide denoted by a formula AxByMzOw, where A includes Ba, B includes Zr, M represents Mn and Co, a composition ratio of Mn to Co is represented by Mn:Co=z1:z2, z=z1+z2, y+z=1.000, 0.100≤z1+z2≤0.200, 0.00<z1/(z1+z2)<0.75, and w represents a positive value satisfying electrical neutrality.