Solid-Phase Manganese Catalyst for Hydrogen Peroxide Decomposition
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Solution Overview
Problem
Manganese-based catalysts for hydrogen peroxide decomposition are either too slow due to their heterogeneous state or cause environmental issues due to homogeneous dispersion in aqueous solutions, making them difficult to recover and reuse effectively.
Innovation Solution
A solid-phase catalyst comprising a permanganate salt and a manganese (II) salt, treated with an organic acid, is formed and calcinated to create nanoparticles that can decompose hydrogen peroxide efficiently and be easily recovered, using a method involving the preparation of an aqueous solution, aging, washing, drying, and calcination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a homogeneous catalyst (manganese-based) is used for hydrogen peroxide decomposition, then the decomposition reaction rate is rapid even at low temperatures, but the catalyst disperses uniformly in the aqueous solution making it difficult to recover and reuse
Solution Approach 1:
The patent changes the physical state parameter of the catalyst from homogeneous (dissolved) to heterogeneous (solid precipitate) by controlling the formation conditions. The manganese-based catalyst is formed as a solid precipitate that can be easily separated from the reaction mixture through filtration or centrifugation, enabling recovery and reuse while maintaining high catalytic activity
Solution Approach 2:
The patent creates a composite catalyst system combining manganese-based catalytic material with support materials or surface modifiers. This composite structure provides both high catalytic activity for rapid hydrogen peroxide decomposition and easy separability through the solid-phase form, resolving the contradiction between reaction rate and catalyst recovery
2Ease of operation
If a solid-phase catalyst is used for hydrogen peroxide decomposition, then the catalyst can be easily recovered and reused, but the decomposition reaction rate is slow
Solution Approach 1:
The patent optimizes parameters such as particle size, surface area, and composition of the solid-phase catalyst to maximize both recoverability and reaction rate. By controlling the formation conditions to create fine particles with high surface area to volume ratio, the catalyst maintains ease of separation while achieving rapid decomposition of hydrogen peroxide
Solution Approach 2:
The patent develops a composite catalyst combining manganese-based active catalytic sites with high-surface-area support materials. This composite structure provides numerous active sites for rapid hydrogen peroxide decomposition while the solid-phase composite can be easily recovered through filtration, solving both contradictions simultaneously
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 catalyst achieves a high hydrogen peroxide decomposition rate and can be reused, with oxygen generation rates of 8-22 L/min·g, and is environmentally friendly due to its solid nanoparticle form and ease of recovery, reducing production costs and environmental impact.
Implementation Method 1
the performance of the catalyst. Since the manganese-based catalyst, potassium permanganate (KMnO4), exists in a homogeneous form in an aqueous solution, it can induce a rapid decomposition reaction even in a low temperature region
Implementation Method 2
the radicals such as HO⋅ and HOO⋅ generated during the decomposition of hydrogen peroxide are utilized in the process for oxidizing and removing contaminants present in an aqueous solution
Data Source
AI summary
The present invention provides a solid-phase catalyst for decomposing hydrogen peroxide comprising a permanganate salt and a manganese (II) salt. The solid-phase catalyst stays a solid state in the form of nanoparticles at the time of hydrogen peroxide decomposition, and thus can be recovered for reuse and also has an excellent decomposition rate. In the method for producing a solid-phase catalyst for decomposing hydrogen peroxide according to the present invention, a solid-phase catalyst is produced from a solution containing a permanganate salt, a manganese (II) salt, and an organic acid, so that the produced solid-phase catalyst is precipitated as a solid component even after a catalytic reaction, and thus is reusable and environmentally friendly, and cost reduction can be achieved through the simplification of a catalyst production technique.