Amorphous Pt-Zn Catalyst for H2O2 Decomposition in Acid
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Solution Overview
Problem
Conventional techniques for hydrogen peroxide decomposition in high-acid concentration waste liquids are inefficient due to catalyst inactivation and dissolution, and lack effective acid recovery and recycling methods.
Innovation Solution
A catalyst with an amorphous metal layer comprising platinum-group metals and Group-6 element metals, supported on a corrosion-resistant base, is used for hydrogen peroxide decomposition, allowing efficient decomposition without additional chemicals or high pressures, and enabling acid recovery and recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional porous material catalysts are used in high-concentration sulfuric acid waste liquid, then the catalyst surface is covered with sulfate ions, but hydrogen peroxide decomposition efficiency decreases
Solution Approach 1:
The invention changes the chemical composition parameters of the catalyst by using a specific alloy containing platinum-group metals (0.01-10 wt%) and zinc (85-99.99 wt%), which prevents sulfate ion adsorption while maintaining catalytic activity for hydrogen peroxide decomposition in high-concentration sulfuric acid environments
Solution Approach 2:
The invention creates a composite catalyst system combining platinum-group metals with zinc in specific ratios, forming a material that exhibits both resistance to sulfate ion coverage and high catalytic activity for hydrogen peroxide decomposition, resolving the contradiction between surface coverage and decomposition efficiency
2Duration of action of stationary object
If conventional catalysts are immersed in high-concentration sulfuric acid for prolonged periods, then the catalyst dissolves away, but catalytic activity is lost
Solution Approach 1:
The invention changes the compositional parameters by incorporating zinc as a base metal with high sulfuric acid resistance, creating an alloy catalyst that maintains structural integrity and catalytic function during prolonged immersion in high-concentration sulfuric acid waste liquid
Solution Approach 2:
The invention uses zinc, a more abundant and cost-effective metal, as the base material of the catalyst, replacing expensive and acid-sensitive noble metals, thereby creating a durable yet economical catalyst suitable for long-term use in harsh acidic environments
3Productivity
If hydrogen peroxide is decomposed using conventional methods, then decomposition occurs, but additional chemicals or high pressure are required
Solution Approach 1:
The invention creates a catalyst that enables hydrogen peroxide decomposition to proceed spontaneously under ambient conditions without requiring additional chemicals, high pressure, or complex processing equipment, allowing the system to serve itself through catalytic action alone
Solution Approach 2:
The invention extracts and eliminates the need for additional chemicals and high-pressure conditions by developing a catalyst that achieves efficient decomposition under simple, ambient conditions, simplifying the overall decomposition process
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 efficiently decomposes hydrogen peroxide in high-acid concentrations, maintains stability over time, and facilitates acid recovery and recycling, reducing treatment costs and environmental impact.
Implementation Method 1
a catalyst layer that is amorphous, includes a platinum-group metal having catalytic function and a Group-6 element metal having catalytic function
Data Source
AI summary
The present invention provides a catalyst for hydrogen peroxide decomposition with which hydrogen peroxide present in acid-containing water to be treated can be efficiently decomposed at low cost and which is less apt to dissolve away in the water being treated, can be stably used over a long period, and renders acid recovery and recycling possible. The present invention has solved the problems with a catalyst for hydrogen peroxide decomposition which is for use in decomposing hydrogen peroxide present in acid-containing water to be treated, the catalyst including a base and, a catalyst layer that is amorphous, includes a platinum-group metal having catalytic function and a Group-6 element metal having catalytic function and is formed over the base.