Core-Shell Catalyst Structure for Heat Transfer
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Solution Overview
Problem
Existing catalysts with ceramic carriers have limitations in heat and mass transfer due to low thermal conductivity, leading to energy loss and deactivation, especially in endothermic and exothermic reactions, and the adhesion strength of porous ceramic layers on metal structures is structurally weak.
Innovation Solution
A catalyst structure with a core-shell configuration is developed, where a metal core is coated with uniformly shaped metal hydroxide or oxide particles, allowing for controlled surface morphology through the use of ions with heteroatoms in the manufacturing process, enhancing heat and mass transfer properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If ceramic carrier is used for catalyst support, then high surface area and catalytic activity are achieved, but thermal conductivity is low leading to poor heat and mass transfer
Solution Approach 1:
The invention uses a composite structure combining metal core (high thermal conductivity) with ceramic shell (high surface area and catalytic activity). The metal core provides thermal conductivity while the ceramic shell maintains high surface area for catalysis, resolving the contradiction between these two properties.
2Quantity of substance
If porous ceramic layer is coated on metal structure, then high surface area is achieved, but adhesion strength is structurally weak
Solution Approach 1:
The invention creates a composite structure where metal core provides mechanical strength and adhesion, while ceramic shell provides high surface area for catalysis. This resolves the contradiction by combining the strengths of both materials in a unified structure.
Solution Approach 2:
The invention applies different material properties to different parts: the metal core provides mechanical strength and adhesion, while the ceramic shell provides high surface area and catalytic activity. Each part performs its specific function optimally.
3Speed
If conventional catalyst module is used, then fast temperature response is achieved, but mechanical strength and lifespan are reduced due to weak adhesion
Solution Approach 1:
The invention uses a composite structure where metal core provides mechanical strength and thermal conductivity for fast temperature response, while ceramic shell provides catalytic activity. The strong adhesion between layers ensures long lifespan, resolving the contradiction between speed and duration.
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 structure improves thermal conductivity and maintains high catalytic activity by controlling the morphology of the metal hydroxide and oxide particles, preventing sintering and maintaining reaction activity even at high temperatures.
Implementation Method 1
performing a hydrothermal reaction of the mixed solution to prepare a metal-metal hydroxide core-shell structure in which a metal hydroxide shell portion is formed on the surface of the metal particle for the core
Implementation Method 2
firing the dried metal-metal hydroxide core-shell structure to prepare a metal-metal hydroxide core-shell structure
Data Source
AI summary
The present invention provides a catalyst structure having a core-shell structure comprising a core comprising a metal and a shell formed on the core, wherein the shell comprises a metal hydroxide crystal or a metal oxide crystal formed uniformly in shape and size perpendicular to the surface of the metal, wherein the metal hydroxide crystal or the metal oxide crystal have a 2D structure or a 1D structure, and preparation method thereof.