Millifluidic Channel Catalyst Coating Control
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Solution Overview
Problem
Current methods for coating fluidic channels with catalysts lack control over dimensions and morphology, leading to issues such as channel clogging and poor catalytic efficacy, especially in continuous flow synthesis.
Innovation Solution
The development of millifluidic devices and methods that allow for controlled coating of fluidic channels with catalysts, enabling precise control over the size, location, and morphology of catalytic nanostructures, including petalled flower-like structures and porous surfaces, to prevent clogging and enhance catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If catalysts are coated on fluidic channels without controlled dimensions and morphology, then catalytic reactions can proceed, but channel clogging occurs and catalytic efficacy is poor
Solution Approach 1:
The patent applies parameter changes by controlling the physical and chemical parameters of the coating process (flow rate, precursor concentration, reaction time, temperature) to achieve catalyst coatings with controlled dimensions and morphology. This resolves the contradiction by ensuring the catalyst layer remains porous and structurally stable, preventing channel clogging while maintaining high catalytic activity.
Solution Approach 2:
The patent utilizes porous materials by creating a porous catalyst coating structure on the fluidic channel walls. This porous morphology allows reactants to access catalytic sites effectively while maintaining channel permeability, thus preventing clogging. The porous structure is achieved through controlled deposition parameters and selective removal processes.
2Ease of manufacture
If catalyst coating dimensions and morphology are not controlled, then coating process is simple, but catalytic activity is reduced and channel clogging occurs
Solution Approach 1:
The patent replaces complex mechanical coating systems with a chemical deposition approach using fluid flow control. Instead of mechanical application methods that require precise positioning and pressure control, the invention uses controlled chemical reactions in flowing precursors to deposit catalysts with desired morphology, simplifying the manufacturing process while achieving precise control.
Solution Approach 2:
The patent employs parameter changes in the deposition process (flow rate, temperature, precursor concentration, reaction time) to control catalyst coating dimensions and morphology. By adjusting these parameters, the process achieves manufacturing precision without requiring complex equipment, maintaining ease of manufacture while improving coating control.
3Measurement precision
If microfluidic channels are used for in situ XAS characterization, then time-resolved structural data can be obtained, but high quality data cannot be obtained for sample concentrations exceeding 0.1 M
Solution Approach 1:
The patent transitions from microfluidic to millifluidic channel dimensions, providing an additional dimensional scale that allows sufficient X-ray penetration depth while maintaining controlled catalyst coating thickness. This dimensional change enables high quality XAS data collection for concentrated samples (up to 1 M) by ensuring the X-ray beam can penetrate the channel and interact with the catalyst coating effectively.
4Measurement precision
If millifluidic channels are used instead of microfluidic channels, then XAS data quality improves for concentrated samples, but device size increases
Solution Approach 1:
The patent applies local quality by creating localized catalyst coatings with specific morphologies and thicknesses at different positions within the millifluidic channel. This allows optimization of XAS measurement conditions in specific regions while maintaining compact overall device dimensions. The localized control of coating properties enables high data quality without requiring uniformly large channel dimensions throughout the entire device.
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 controlled catalyst coatings enable efficient catalytic reactions without channel clogging, providing superior continuous flow catalysis and allowing for the synthesis of nanomaterials with precise control over size and morphology, enhancing reaction outcomes.
Implementation Method 1
flowing a precursor solution or a mixture of precursor solutions through the millifluidic device to form a coating of catalytic structures on an inner surface of the millifluidic device
Data Source
AI summary
The invention provides a method for coating fluidic channels, particularly millifluidic channels, with a catalyst coating having controlled dimensions and morphology, and methods for preparing such channels, and devices that can be used in combination with the channels. The invention further provides portable, hand-held millifluidic devices applicable for a wide variety of uses including molecular reduction reactions, in situ material characterization, in situ reaction catalysis characterization, in situ reaction mechanism characterization, nanomaterial synthesis, nanostructured metal and metal oxide growth and coating of channels, continuous flow cell culturing, enzymatic catalysis, biomolecular catalysis, combinatorial chemistry, reactions involving homogeneous catalysts bound to channel walls, peptide synthesis, nucleic acid synthesis, synthesis of pharmaceutical intermediates, biofunctionalization of nanomaterials or a combination thereof.