Metal Organic Framework Materials for Hydrocarbon Kinetic Separation
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Solution Overview
Problem
Existing methods for separating similar chemical species, such as light alkanes and alkenes, are difficult and costly, necessitating the development of more effective materials and techniques for kinetic separation in chemical streams.
Innovation Solution
Metal organic framework materials composed of metal ions, triazoles, and imidazoles, specifically forming a monoclinic crystal structure, are used for the kinetic separation of hydrocarbons, demonstrating superior separation performance compared to conventional materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional separation methods are used for light alkanes and alkenes, then separation can be achieved, but the process becomes difficult and costly
Solution Approach 1:
The patent employs metal organic framework (MOF) materials with precisely engineered porous structures to achieve kinetic separation of light alkanes and alkenes. The porous architecture enables selective molecular transport based on size and shape differences, providing effective separation while simplifying the overall process compared to conventional multi-step methods
Solution Approach 2:
The invention utilizes controlled changes in synthesis parameters (temperature, pressure, solvent composition, metal-to-ligand ratios) to tailor the pore size, surface area, and chemical environment of the MOF materials. These parameter adjustments optimize the materials for specific separation applications, enabling high selectivity for distinguishing between similar hydrocarbon molecules
2Reliability
If conventional separation methods are used for light alkanes and alkenes, then separation can be achieved, but the cost increases
Solution Approach 1:
The patent replaces complex mechanical separation systems (such as distillation columns, multiple compression stages, and cryogenic equipment) with a single-pass adsorption process using MOF materials. This substitution dramatically reduces capital investment, operating costs, and energy consumption while maintaining high separation effectiveness for light hydrocarbons
3Manufacturing precision
If metal organic framework materials with monoclinic crystal structure are used, then kinetic separation performance is improved, but the material synthesis complexity increases
Solution Approach 1:
The patent achieves precise control over MOF crystal structure (including monoclinic polymorphs) by systematically adjusting synthesis parameters such as temperature, pressure, solvent type, pH, and metal-to-ligand ratios. These parameter optimizations enable reproducible formation of desired crystal structures with specific pore geometries tailored for kinetic separation, while maintaining practical synthesis procedures
Solution Approach 2:
The invention employs template molecules, surfactants, or specific solvent systems as intermediaries during MOF synthesis to direct crystal growth toward desired monoclinic polymorphs. These intermediaries facilitate the formation of specific crystal structures without requiring overly complex multi-step synthesis protocols, balancing structural precision with manufacturing simplicity
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
These materials exhibit enhanced separation efficiency and selectivity, as evidenced by high ethylene/ethane diffusion selectivity and thermal stability, effectively isolating hydrocarbons like ethane and ethylene with improved adsorption capacities and kinetic selectivity.
Implementation Method 1
at least a portion of the metal ions may be coordinated by the one or more triazoles and the one or more imidazoles
Implementation Method 2
a first portion of the hydrocarbons are adsorbed by the metal organic framework material
Implementation Method 3
high ethylene/ethane diffusion selectivity
Data Source
AI summary
The present disclosure is directed to metal organic framework materials and uses for such metal organic framework materials. According to one embodiment, a metal organic framework material may include zinc ions, one or more triazoles, and one or more imidazoles. At least a portion of the zinc ions may be coordinated by the triazoles and the imidazoles such that at least a portion of the metal organic framework material forms a crystalline structure belonging to a monoclinic crystal system.