Fe(III) Oxide Granules for H2O2 Quenching
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Solution Overview
Problem
Existing water treatment methods for removing residual hydrogen peroxide (H2O2) from drinking water sources are inefficient and require frequent reactivation of porous organic materials like granular activated carbon (GAC), leading to decreased catalytic activity and increased costs.
Innovation Solution
The use of self-supported granules of Fe(III) oxide in a catalytic reactor system for heterogeneous catalytic quenching of H2O2, which are less susceptible to fouling and do not require extensive reactivation, maintaining high efficiency over a longer service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If granular activated carbon (GAC) is used to catalytically quench H2O2, then H2O2 removal is achieved, but the catalytic activity decreases over time due to pore fouling by organic matter
Solution Approach 1:
The patent changes the fundamental parameter of catalytic material from organic GAC to inorganic Fe(III) oxide, which has different chemical properties that prevent fouling by organic matter. This parameter change resolves the contradiction by maintaining catalytic activity while extending service life.
Solution Approach 2:
The patent uses composite inorganic materials (Fe(III) oxide, possibly combined with other metal oxides or supports) to create a catalytic system that combines high H2O2 removal efficiency with resistance to fouling, thereby extending operational duration without sacrificing reliability.
2Reliability
If GAC is used for H2O2 removal, then catalytic quenching is achieved, but periodic reactivation is required which is expensive and restores only a fraction of original activity
Solution Approach 1:
The patent employs inorganic catalytic materials that are inexpensive and do not require reactivation. Instead of periodically reactivating expensive GAC, the system uses affordable inorganic materials that maintain activity throughout their service life, eliminating reactivation costs.
Solution Approach 2:
The inorganic catalytic material is designed to be self-sustaining without requiring external reactivation processes. It automatically maintains its catalytic activity through its inherent resistance to fouling, eliminating the need for costly periodic maintenance interventions.
3Reliability
If chlorine is added to oxidize residual H2O2, then H2O2 is removed, but additional chlorine is required to achieve targeted residual concentration
Solution Approach 1:
The patent extracts and removes H2O2 through catalytic quenching before the disinfection stage, separating the H2O2 removal function from the chlorine disinfection function. This prevents H2O2 from consuming chlorine, thereby reducing the total chlorine dosage required.
Solution Approach 2:
The patent performs H2O2 removal as a preliminary step before disinfection. By eliminating H2O2 in advance through catalytic quenching, the system prevents subsequent chlorine consumption, allowing optimized chlorine dosing for disinfection without excess addition.
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 Fe(III) oxide system achieves H2O2 removal efficiencies of 90-99.9% with a longer operational life and reduced maintenance needs, improving flow rates and efficiency while avoiding the limitations of traditional GAC systems.
Implementation Method 1
heterogeneous catalytic quenching of H2O2 in a water source
Data Source
AI summary
Devices, systems, and methods for heterogeneous catalytic quenching of hydrogen peroxide (H2O2) in a water source are disclosed. An exemplary device includes a column containing a catalytic material. The catalytic material can include self-supported granules of Fe(III) oxide. Catalytic reactor systems incorporating the columns and methods of making and using the same are also disclosed.