Density-Adjustable Catalytic Beads for Gas-Liquid Interface Positioning

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Solution Overview

Problem

Conventional bead-type structures used in catalytic reactions at interfaces between gases and liquids or between liquids lack adjustability in buoyancy, leading to inefficiencies such as settling or being discharged due to flow or density differences, limiting their effectiveness in converting carbon dioxide and promoting microalgae growth.

Innovation Solution

A density-adjustable structure that incorporates a body with adjustable voids and materials, allowing it to float or settle in liquids, and includes organic catalysts, inorganic catalysts, or microorganisms to enhance catalytic reactions and microalgae growth by positioning at interfaces between gases and liquids or between liquids.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional bead-type structure is used in catalytic reactions at interfaces, then the structure can be simple in design, but the structure cannot adjust buoyancy and may settle or be discharged due to flow or density differences

Engineering Contradiction:
Improvebuoyancy adjustabilityVSAvoidstructure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The bead-type structure incorporates an adjustable buoyancy mechanism that allows dynamic adjustment of buoyancy force according to liquid density and flow conditions. This enables the structure to adapt to different operating conditions (settling, suspension, or floating) without requiring multiple different structures, thus improving adaptability while maintaining reasonable complexity.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the buoyancy parameter of the bead-type structure by incorporating adjustable elements (such as movable weights, variable volume chambers, or density-adjustable materials) that allow the buoyancy force to be tuned. This enables the same structure to operate effectively across different liquid densities and flow rates, resolving the contradiction between adaptability and complexity.

Inventive Principle:
Principle #35Parameter changes

2Productivity

If catalytic material is uniformly dispersed in liquid, then the distribution is simple, but most catalytic material is not used as only material at the interface is involved in the reaction

Engineering Contradiction:
Improvecatalytic reaction efficiencyVSAvoidutilization of catalytic material
Core Design Contradiction:
ProductivityVSQuantity of substance

Solution Approach 1:

The bead-type structure acts as an intermediary carrier that concentrates catalytic material at the gas-liquid or liquid-liquid interface where reactions occur. Instead of uniform dispersion, the catalyst is immobilized on or within the beads, which then selectively position themselves at the interface, maximizing catalytic activity and material utilization efficiency.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention applies catalytic material locally at the interface rather than uniformly throughout the liquid. The bead-type structures concentrate the catalyst precisely where it is needed (at the interface), creating local high-concentration zones that dramatically improve reaction efficiency and catalyst utilization while reducing the total amount of catalyst required.

Inventive Principle:
Principle #3Local quality

3Productivity

If the structure is positioned at the interface between gas and liquid, then catalytic reaction efficiency is improved, but the structure may be discharged during liquid flow or overflow

Engineering Contradiction:
Improvecatalytic reaction efficiencyVSAvoidposition stability
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The adjustable buoyancy mechanism allows the structure to dynamically respond to flow conditions. Under normal operation, the structure positions itself at the interface for maximum catalytic efficiency. During high flow or overflow conditions, the buoyancy can be adjusted to increase upward force, preventing discharge and maintaining position stability without sacrificing reaction efficiency during normal operation.

Inventive Principle:
Principle #15Dynamics

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 structure effectively maintains position and efficiency in catalytic reactions, improving carbon dioxide conversion and microalgae growth by adjusting its buoyancy and positioning, preventing discharge during flow or overflow, and enhancing reaction yields.

Implementation Method 1

a structure whose average density is adjusted by changing the material of the structure and the size of a void formed therein so that the structure can float on a surface of a liquid or be suspended in a liquid

Methodology Applied
Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

a first material included in the body, wherein the first material includes at least one selected from an organic catalyst, an inorganic catalyst, a microorganism, and a biomolecule

Methodology Applied
Scientific EffectCatalysis: Catalysis

Data Source

PatentUS10888839B2Average-density-adjustable structure, and material change and selective bonding process using same
Publication Date: 2021.01.12 KOREA UNIV RES & BUSINESS FOUND
  • US10888839B2 patent drawing
  • US10888839B2 patent drawing
  • US10888839B2 patent drawing

AI summary

The present invention relates to an average-density-adjustable structure and more specifically provides a structure the average density of which is adjusted by changing the material of the structure and the size of a void formed therein and which can thereby float on the surface of or in a liquid and can easily bond with or change a material present in a gas or liquid by being equipped with a first material, which is one among an organic catalyst, an inorganic catalyst, a microorganism, and a biomolecule.