UZM-39 Zeolite Coherent TUN-IMF Composite for Diffusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current zeolite technologies, such as TNU-9 and IM-5, face limitations in diffusion due to interrupted connectivity and varying channel sizes, which affect their performance in hydrocarbon conversion reactions and separation processes.
Innovation Solution
Development of a new aluminosilicate zeolite, UZM-39, with a coherently aligned TUN and IMF structure, allowing for continuous crystal planes and enhanced thermal stability, synthesized using a Layered Material Conversion approach with specific reactants like 1,4-dibromobutane and 1-methylpyrrolidine, enabling improved diffusion and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TNU-9 or IM-5 zeolite structures are used, then catalytic activity is achieved, but diffusion is limited due to interrupted connectivity and varying channel sizes
Solution Approach 1:
The patent combines TUN and IMF zeotype structures into a coherently aligned composite where TUN regions provide continuous channel connectivity for improved diffusion, while IMF regions contribute catalytic active sites, achieving both high diffusion rates and catalytic activity simultaneously
Solution Approach 2:
The invention creates a composite zeolite material with coherent TUN-IMF interface that integrates the advantages of both parent structures: the three-dimensional 10-ring channel system of TUN for superior mass transport and the catalytic functionality of IMF, resulting in a material with enhanced overall performance
2Manufacturing precision
If complex structure directing agents are used to synthesize TNU-9 or IM-5, then specific zeolite structures are formed, but synthesis complexity increases
Solution Approach 1:
The synthesis approach segments the structure directing function into two separate simple agents: 1,4-dibromobutane that directs TUN framework formation, and 1-methylpyrrolidine that directs IMF framework formation, eliminating the need for complex pre-synthesized dicationic agents while achieving coherent composite structure
Solution Approach 2:
The patent changes the synthesis parameters by using readily available simple chemical agents instead of complex structure directing agents, modifying the chemical environment to enable coherent growth of TUN-IMF composite through controlled hydrothermal synthesis conditions
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
UZM-39 exhibits enhanced thermal stability up to 600°C, improved diffusion due to continuous channels, and increased micropore volume, making it suitable for hydrocarbon conversion and separation processes.
Implementation Method 1
improved diffusion due to continuous channels
Implementation Method 2
enhanced thermal stability up to 600°C
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A new family of coherently grown composites of TUN and IMF zeotypes have been synthesized. These zeolites are represented by the empirical formula. NanMm k+TtAl1-xExSiyOz where "n" is the mole ratio of Na to (Al + E), M represents a metal or metals from zine, Group 1, Group 2, Group 3 and or the lanthanide series of the periodic table, "m" is the mole ratio of M to (Al + E), "k" is the average charge of the metal or metals M, T is the organic structure directing agent or agents, and E is a framework element such as gallium. These zeolites are similar to TNU-9 and IM-5 but are characterized by unique compositions and synthesis procedures and have catalytic properties for carrying out various hydrocarbon conversion processes and separation properties for carrying out various separations.