Microreactor Catalyst Alignment for Liquid Phase Reaction Efficiency
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Solution Overview
Problem
Liquid phase chemical reactions in microreactors face challenges such as high pressure loss, clogging, and reduced reaction rates due to gas generation and inadequate contact between catalysts and reactants, leading to inefficient catalytic activity.
Innovation Solution
Aligning solid catalysts in a straight line within the microchamber to optimize the contact area between reactants and catalysts, using pellet-shaped, tablet-shaped, or disc-shaped catalysts that include transition metal elements or acids, and conducting liquid phase chemical reactions to enhance reaction efficiency and prevent channeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If granular solid catalysts are used to increase contact area, then catalyst contact area is improved, but channeling occurs and reaction rate decreases
Solution Approach 1:
The invention changes the geometric parameters of the catalyst from granular to pellet-shaped, tablet-shaped, or disc-shaped with specific dimension ratios. By controlling the length-to-diameter ratio to be 0.5 or more, the catalyst geometry is optimized to prevent channeling while maintaining sufficient contact area, thereby resolving the contradiction between contact area and reaction rate
Solution Approach 2:
The invention applies different geometric characteristics to different parts of the catalyst structure. The catalysts are designed with specific shapes (pellet, tablet, or disc) that create appropriate flow paths locally, preventing channeling in critical areas while maintaining high surface area for catalysis. This local geometric optimization enables both good contact area and uniform flow distribution
2Temperature
If microreactor is used for liquid phase chemical reaction, then heat transfer efficiency is improved, but pressure loss increases and clogging occurs
Solution Approach 1:
The invention changes the geometric parameters of the catalyst particles (size, shape, and length-to-diameter ratio) to optimize flow characteristics. By using pellet-shaped, tablet-shaped, or disc-shaped catalysts with controlled dimensions, the pressure loss is reduced while maintaining effective heat transfer, resolving the contradiction between heat transfer efficiency and pressure loss
3Productivity
If gas is generated by reaction, then reaction completeness is improved, but gas adheres to catalyst surface and contact is inhibited
Solution Approach 1:
The invention changes the catalyst geometry to pellet-shaped, tablet-shaped, or disc-shaped forms with specific length-to-diameter ratios. These geometric modifications facilitate gas bubble detachment and prevent gas adhesion to the catalyst surface, maintaining reliable contact between liquid reactants and catalyst while allowing complete reaction with gas generation
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 configuration allows for high-rate chemical reactions with reduced pressure loss and channeling, enabling high-yield product formation while maintaining efficient heat transfer and catalyst contact, thus facilitating the design and operation of microreactors.
Implementation Method 1
the heat caused by the exothermic reaction can be removed rapidly and the temperature distribution bias can be prevented, because the heat-transfer efficiency is high
Implementation Method 2
solid catalysts are aligned in a straight line in the longitudinal direction of the microchamber to fill the microchamber
Data Source
Figure 1~3
Figure 4
AI summary
MICROREACTOR AND LIQUID PHASE CHEMICAL REACTION METHOD USING MICROREACTOR This invention provides a microreactor comprising a microchamber provided with a raw material introduction port and a product discharge port; wherein solid catalysts are aligned in a line in the longitudinal direction of the microchamber to fill the microchamber.