Refillable Packed Bed Cathode for Continuous Hydride Gas Production
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Solution Overview
Problem
Existing electrochemical reactors for hydride gas production face limitations such as increased cell voltage due to anode by-products, limited source material utilization, decreased energy efficiency, and frequent disassembly for refilling, making them unsuitable for large-scale, continuous or semi-continuous production of high purity hydride gases.
Innovation Solution
An electrochemical reactor system with a pressure vessel containing a cathode, anode, and electrolyte, featuring a refillable packed bed cathode, a non-conducting perforated plate, and a cathode material refill chamber, allowing continuous or semi-continuous operation with minimal cell voltage changes and energy-efficient hydride gas production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a sealed packed bed electrochemical reactor is used, then hydride gas can be generated continuously, but the cell voltage increases over time due to anode by-products coating the cathode bed
Solution Approach 1:
The patent extracts the harmful anode by-products from the electrolyte using a filtration system that removes metal hydroxides and other contaminants. This prevents the by-products from coating the cathode bed and increasing cell voltage, while maintaining continuous operation of the sealed reactor.
Solution Approach 2:
The patent changes the chemical composition parameters of the electrolyte by adding specific additives that prevent by-product formation and reduce coating on the cathode. This maintains lower cell voltage over time while preserving continuous production capability.
2Productivity
If the cathode source material is sealed in the reactor cell, then the reactor can operate continuously, but the quantity of hydride gas produced is limited to the initial source material
Solution Approach 1:
The patent prepares multiple cathode source material cartridges in advance, each containing sufficient precursor material for extended operation. These cartridges are pre-loaded and sealed, allowing continuous replenishment of the cathode bed without interrupting the electrochemical reaction.
Solution Approach 2:
The patent implements a dynamic cathode bed replenishment system where spent cathode material is automatically removed and fresh material is introduced through a controlled mechanism. This maintains continuous operation while extending the total quantity of hydride gas that can be produced.
3Ease of manufacture
If the reactor cell is disassembled for refilling, then new source material can be added, but production time is lost and operational continuity is interrupted
Solution Approach 1:
The patent divides the cathode bed into multiple segments or uses modular cartridges that can be independently replaced. This allows the reactor to maintain operation while individual sections are serviced, minimizing production time loss compared to complete disassembly.
Solution Approach 2:
The patent implements an automated cathode bed replenishment system that performs the refilling operation without manual disassembly. The system automatically removes spent material and loads fresh material, eliminating time-consuming manual intervention while maintaining operational continuity.
4Quantity of substance
If compressed gas cylinders are used for hydride gas storage, then gas can be supplied to the reactor, but hazards and liabilities increase during transport, handling, and storage
Solution Approach 1:
The patent generates hydride gas on-site through the electrochemical reactor using sealed cathode source material. This eliminates the need to transport, handle, or store hazardous compressed gas cylinders, as the gas is produced fresh and used immediately in the semiconductor fabrication process.
Solution Approach 2:
The patent removes the hazardous storage and transport环节 from the process by generating hydride gas directly at the point of use. The sealed reactor system contains only minimal amounts of precursor material, eliminating the safety hazards associated with large quantities of stored hydride gas.
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
The system enables high-purity hydride gas production at high rates with reduced energy consumption and minimal environmental risk, eliminating the need for frequent cell disassembly and refilling, suitable for direct use in semiconductor manufacturing.
Implementation Method 1
the cathode includes a first amount of an electrically conductive precursor material that is reducible to form the hydride gas
Implementation Method 2
a valve selectively positionable to an open position allowing transfer of some or all of the second amount of the electrically conductive precursor material through the first opening and into the interior of the pressure vessel
Data Source
AI summary
Described are electrochemical systems and methods for the generation of high purity hydride gases, e.g. for delivery to semiconductor fabrication reactors.