Zeolite Membrane Infiltration Depth for Adhesion and Permeability
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Solution Overview
Problem
Zeolite membrane complexes face challenges in maintaining adhesion to supports while achieving optimal gas permeability, as shallow infiltration can lead to delamination and deep infiltration increases permeation resistance, affecting desired gas permeation rates.
Innovation Solution
A zeolite membrane complex is designed with a porous support where the zeolite membrane is formed, with a controlled infiltration depth not exceeding 5 μm and a specific atomic percentage ratio, ensuring adhesion and increased permeability by optimizing the infiltration depth and porosity alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the infiltration depth of the zeolite into the support is increased to improve adhesion, then the adhesion between zeolite membrane and support is improved, but the gas permeation rate decreases due to increased permeation resistance
Solution Approach 1:
The invention optimizes the infiltration depth parameter to a specific range (0.1-5 μm) and controls the atomic percentage ratio (B/C)/A to be 0.8 or more, thereby achieving optimal balance between adhesion and gas permeation without excessive zeolite infiltration that would cause high permeation resistance
Solution Approach 2:
The invention creates a localized optimized structure where the zeolite membrane infiltration is controlled to be shallow (0.1-5 μm) only in the region where it is needed for adhesion, while maintaining higher porosity and lower infiltration in the bulk membrane region to preserve gas permeation pathways
2Productivity
If the infiltration depth of the zeolite into the support is decreased to improve gas permeation rate, then the gas permeation rate increases due to reduced permeation resistance, but the adhesion between zeolite membrane and support deteriorates
Solution Approach 1:
The invention sets the infiltration depth to a minimum effective value (0.1-5 μm) sufficient for adhesion while controlling the atomic percentage ratio (B/C)/A to be 0.8 or more, thereby preventing delamination without creating excessive permeation resistance that would reduce gas permeation rate
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 approach enhances the permeability of the zeolite membrane complex while maintaining adhesion to the support, achieving desired gas permeation rates and reducing permeation resistance.
Implementation Method 1
adhesion between the zeolite membrane and the support
Implementation Method 2
gas permeation rate
Data Source
AI summary
Part of a zeolite membrane of a zeolite membrane complex is set in pores of a support over a boundary surface between the zeolite membrane and the support. With respect to a main element constituting the zeolite membrane, a distance in a depth direction perpendicular to the boundary surface between a position at which a ratio (B/C)/A is 0.8 and the boundary surface is preferably not smaller than 0.01 μm and not larger than 5 μm. B/C is a value obtained by dividing an atomic percentage B of the main element inside the support by a porosity C of the support. The ratio (B/C)/A is a ratio of the value to an atomic percentage A of the main element in the zeolite membrane.