Photocatalytic Reactor Blade Light Redirection
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Solution Overview
Problem
Current photocatalytic oxidation (PCO) systems suffer from inefficiencies in fluid flow and light utilization, leading to partial breakdown of larger molecules into undesirable intermediates, and lack effective control over photocatalytic reactions.
Innovation Solution
A photocatalytic reactor housing with aerodynamic blades and a light redirecting mechanism that enhances fluid flow and light containment, using a stable support material with high adhesion and durability, and allowing for diverse photocatalytic coatings to tailor reactions for specific applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional PCO systems are used with simple fluid flow paths, then device complexity is reduced, but photocatalytic reaction efficiency deteriorates due to turbulence and poor light utilization
Solution Approach 1:
The reactor is divided into multiple blade elements arranged in a circular pattern around the light source. Each blade is a separate component with photocatalytic coating, allowing modular construction and optimized fluid flow paths while maintaining system efficiency
Solution Approach 2:
The reactor transitions from a linear flow path to a three-dimensional circular arrangement with blades extending radially outward. This dimensional change creates multiple light exposure surfaces and improves fluid circulation patterns, enhancing photocatalytic efficiency without proportionally increasing complexity
2Productivity
If conventional light sources are used without redirection mechanisms, then device complexity is minimized, but light utilization efficiency deteriorates leading to partial breakdown of contaminants into intermediates
Solution Approach 1:
Light redirection surfaces are pre-positioned on the blade structures to intercept and redirect light before it escapes the reactor. This preliminary action ensures maximum light utilization for complete contaminant degradation, preventing formation of intermediate compounds
Solution Approach 2:
The reactor design captures light that would otherwise be wasted or cause incomplete reactions and redirects it to additional photocatalytic surfaces. This converts potential energy loss into beneficial additional reaction zones, improving overall efficiency
3Productivity
If fluid flow is not optimized in conventional PCO systems, then ease of operation is maintained, but photocatalytic efficiency deteriorates due to turbulence and poor contact with catalyst surface
Solution Approach 1:
The reactor employs curved blade surfaces and circular flow paths instead of linear configurations. This curvature naturally guides fluid flow in smooth patterns, reducing turbulence and improving contact time with photocatalytic surfaces without complex control mechanisms
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
This design improves photocatalytic reaction efficiency by reducing turbulence, increasing laminar flow, and reclaiming unused light, resulting in a more controlled and effective breakdown of contaminants.
Implementation Method 1
By utilizing a metal oxide catalyst, often titanium or silicon dioxide (possibly impregnated with other trace elements), irradiated by light, (generally in the ultraviolet spectrum, but not always), and having a fluid of air, water, or other gas or liquid passed over the irradiated surface
Implementation Method 2
the interior surface of the blade configured to redirect some amount of light emitted by the light source on to another portion of substrate of an adjacent blade
Data Source
AI summary
A photocatalytic reactor housing having a longitudinal axis allowing a fluid to flow through; a frame holding a light source and blades substantially encompassing the light source around the longitudinal axis; each blade having an interior surface facing the light source and an exterior surface opposite the interior surface; at least a portion of the surface of a plurality of the blades having a coating of material with photocatalytic oxidative properties; and the interior surface of the blade configured to redirect some amount of the light emitted onto another portion of substrate of an adjacent blade. In one embodiment the blades are tilted in the radial direction along at least a portion of the blades. In one embodiment the interior surface is configured to reflect some of the light emitted by the light source on to at least a portion of the exterior surface of an adjacent blade.