BEA Zeolite Crystal Size Control via Surfactant Emulsions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods are insufficient for continuously and consistently producing characterizable nano-sized Beta structured (BEA) zeolite crystals at desired size ranges, which is crucial for catalytic applications due to diffusion limitations and coke formation issues in zeolite pore structures.
Innovation Solution
The use of organic emulsions with surfactants to control the size of BEA zeolite crystals, achieved by varying the silicon to aluminum ratios in silica-alumina solutions and recycling surfactants to maintain consistent size ranges, allowing for the production of nano-sized BEA zeolite crystals in specific size ranges such as 40 nm to 500 nm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce BEA zeolite crystals, then production can occur, but consistent size control and continuous production at industrial scale are insufficient
Solution Approach 1:
The patent applies parameter changes by systematically varying the silicon to aluminum ratios in silica-alumina solutions to control crystal size. By adjusting this compositional parameter, the method achieves consistent production of nano-sized BEA zeolite crystals in specific size ranges (40-90 nm, 80-250 nm, 200-500 nm) while maintaining continuous production capability at industrial scale
Solution Approach 2:
The patent uses surfactants as intermediary substances to mediate the crystal growth process. The surfactants interact with the silica-alumina solution to control nucleation and growth rates, enabling consistent size control of nano-sized crystals while facilitating continuous production through controlled emulsion formation and stabilization
2Length of moving object
If temperature is increased during crystal formation to produce nano-sized zeolites, then crystal size can be reduced, but production consistency and characterizability at large industrial scale are compromised
Solution Approach 1:
Instead of relying solely on temperature increases, the patent changes the compositional parameters of the silica-alumina solution, specifically the silicon to aluminum ratio. This alternative parameter adjustment achieves nano-sized crystal formation (40-500 nm) while maintaining production consistency and characterizability at industrial scale, avoiding the reliability issues associated with high-temperature processing
3Length of moving object
If stirring speed is controlled to produce nano-sized zeolites, then crystal size can be influenced, but continuous production at desired size ranges with characterization capability is insufficient
Solution Approach 1:
The patent transitions from mechanical control (stirring speed) to compositional control (silicon to aluminum ratio) for size determination. This parameter change enables both nano-sized crystal production (40-500 nm) and continuous high-rate production, as compositional parameters can be precisely controlled and maintained during continuous processing, unlike mechanical stirring which is difficult to scale consistently
Solution Approach 2:
The patent introduces surfactants as intermediary agents that mediate crystal growth kinetics. These surfactants provide consistent size control (40-500 nm ranges) independent of stirring variations, enabling reliable continuous production at industrial scale with full characterization capability, overcoming the limitations of stirring-speed-based control
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 method enables the production of consistently-sized nano-sized BEA zeolite crystals that exhibit improved performance in hydrocarbon cracking and conversion processes, with targeted control over crystal sizes and enhanced dispersion as catalysts.
Implementation Method 1
systems and methods applying emulsions with organic solvents and surfactants to produce BEA zeolites with consistent and targeted size control
Implementation Method 2
The emulsion solution, including an organic solvent and a surfactant, and silica-alumina solution mixture are allowed to react together
Implementation Method 3
heating the zeolite emulsion solution mixture; and precipitating the consistently-sized BEA zeolite nano-crystals
Data Source
AI summary
Methods and systems for production of consistently-sized BEA zeolite nano-crystals, the method including mixing an emulsion, the emulsion comprising a surfactant and an organic solvent; heating the emulsion; mixing a zeolite solution, the zeolite solution comprising a silicon-containing compound and an aluminum-containing compound; heating the zeolite solution; adding the emulsion to the zeolite solution drop-wise over time to create an zeolite emulsion solution mixture; heating the zeolite emulsion solution mixture; and precipitating the consistently-sized BEA zeolite nano-crystals.