Acoustic Reactor Standing Waves for Scalable Sonochemical Reactions
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Solution Overview
Problem
Conventional acoustic reactors face challenges in scaling up sonochemical reactions due to high energy consumption, non-specificity of chemistry, and limited reaction area, preventing industrial application.
Innovation Solution
An acoustic reactor design utilizing counter-propagating ultrasound waves formed by a reflector arrangement that folds waves in on themselves, creating a standing wave in the reactor vessel, allowing for high intensity regions and reduced energy input, with a single ultrasound transducer and optional pulsed wave generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple ultrasound transducers are used to generate sufficient energy, then the intensity of ultrasound applied to reactants is increased, but the reaction area is limited to a small area and energy consumption increases
Solution Approach 1:
The patent combines multiple ultrasound waves from a single transducer by using reflector arrangements to fold waves in on themselves, creating counter-propagating waves that interfere constructively. This merging approach concentrates ultrasound energy into high intensity regions within the reactor vessel without requiring multiple transducers, thereby expanding the effective reaction area while maintaining high power density.
Solution Approach 2:
The patent introduces spatial dimensionality through reflector arrangements that fold ultrasound waves in on themselves, creating three-dimensional standing wave patterns within the reactor vessel. This dimensional approach allows ultrasound energy to be distributed throughout a larger volume of reactants rather than being confined to a small focal area, effectively expanding the reaction area while maintaining high intensity.
2Power
If multiple ultrasound transducers are used to generate sufficient energy, then the intensity of ultrasound applied to reactants is increased, but the energy consumption increases
Solution Approach 1:
The patent combines multiple ultrasound waves from a single transducer by using reflector arrangements to fold waves in on themselves, creating counter-propagating waves that interfere constructively. This merging approach concentrates ultrasound energy into high intensity regions within the reactor vessel without requiring multiple transducers, thereby expanding the effective reaction area while maintaining high power density.
3Power
If conventional acoustic reactors are used, then ultrasound intensity is concentrated in a small area, but the reaction cannot be scaled up to industrial scales
Solution Approach 1:
The patent introduces spatial dimensionality through reflector arrangements that fold ultrasound waves in on themselves, creating three-dimensional standing wave patterns within the reactor vessel. This dimensional approach allows ultrasound energy to be distributed throughout a larger volume of reactants rather than being confined to a small focal area, effectively expanding the reaction area while maintaining high intensity.
Solution Approach 2:
The patent creates a scalable reactor design where the same fundamental mechanism (counter-propagating waves from a single transducer) can be applied across different reactor sizes and configurations. The reflector arrangement and standing wave formation principle remain universal regardless of scale, enabling industrial-scale application while maintaining the high intensity benefits of focused ultrasound.
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 design achieves a more energy-efficient process capable of scaling up sonochemical reactions, providing spatial and temporal control over cavitation, and enhancing chemical reaction efficiency compared to conventional setups.
Implementation Method 1
an ultrasound transducer arrangement configured to emit coherent ultrasound waves into the chamber
Implementation Method 2
a reflector arrangement arranged to reflect coherent ultrasound waves from the ultrasound transducer arrangement in opposing directions into the reactor vessel so that the reflected acoustic waves form a standing wave in the reactor vessel
Implementation Method 3
counter-propagating ultrasound waves to create a standing wave in the reactor vessel. Folding the waves in on themselves to form the counter-propagating waves creates a high intensity region within the reactor vessel
Implementation Method 4
cavitation requires a large amount of energy. Conventional acoustic reactors used for sonochemical reactions use multiple ultrasound transducers to generate ultrasound of sufficient energy... Folding the waves in this way means that less input electrical power is needed to generate cavitation
Data Source
AI summary
An acoustic reactor is provided, comprising a body defining a chamber for holding an ultrasound medium and a reactor vessel for receiving a reactant, the reactor vessel positioned in the chamber. An ultrasound transducer arrangement is configured to emit coherent ultrasound waves into the chamber. A reflector arrangement is arranged to reflect coherent ultrasound waves from the ultrasound transducer arrangement in opposing directions into the reactor vessel so as to form a standing wave in the reactor vessel.