Oxocarbon Electrolyzer Gas Separation With Product Gas Recycle
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Solution Overview
Problem
Existing oxocarbon electrolyzers struggle to achieve near 100% conversion of oxocarbons to desired products, requiring inefficient and costly separation of unconverted oxocarbons, which are typically recycled upstream, leading to energy waste and reduced catalyst efficiency.
Innovation Solution
Recycle product gases from the output stream of oxocarbon electrolyzers back to the input, using a combination of membrane, temperature swing adsorption, pressure swing adsorption, cryogenic, and lean oil separators to enhance efficiency and purity, while minimizing excessive oxocarbon exposure to the catalyst.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If unconverted oxocarbon is separated and recycled upstream in traditional gas reactor processes, then conversion rate approaches 100%, but energy consumption increases and catalyst efficiency decreases
Solution Approach 1:
Instead of separating unconverted oxocarbon from product gases before recycling (traditional approach), this invention recycles the mixed output stream directly back to the electrolyzer input. This inversion of the separation-recycling sequence eliminates the need for energy-intensive separation steps while maintaining near 100% conversion through continuous recycling of the combined stream.
Solution Approach 2:
The invention extracts and eliminates the unnecessary separation step from the traditional process flow. By removing the separation stage that divides unconverted oxocarbon from product gases, the system directly recycles the mixed output stream, thereby eliminating the energy consumption and equipment complexity associated with separation while achieving complete conversion through recycling.
2Productivity
If unconverted oxocarbon is recycled upstream, then conversion rate increases, but excessive oxocarbon exposure to catalyst forms undesirable byproducts
Solution Approach 1:
The continuous recycling of the mixed output stream maintains a steady-state composition at the electrolyzer input where product gases and unconverted oxocarbon are continuously mixed. This continuous action prevents excessive accumulation of oxocarbon at the catalyst surface, thereby eliminating the formation of undesirable byproducts while achieving near 100% conversion.
Solution Approach 2:
Product gases act as an intermediary substance that mixes with unconverted oxocarbon in the recycled stream. This intermediary product gas moderates the oxocarbon concentration at the catalyst surface, preventing excessive exposure and the formation of undesirable byproducts while still enabling complete conversion through the recycling loop.
3Manufacturing precision
If product gases are separated from feedstock gases before recycling, then product purity is maintained, but additional separation stages increase device complexity and cost
Solution Approach 1:
The invention extracts and removes the separation stage from the process flow. By eliminating the separation step that divides product gases from unconverted oxocarbon before recycling, the system simplifies the device structure and reduces equipment cost while maintaining product purity through the alternative approach of direct recycling followed by single-stage separation of the final product stream.
Solution Approach 2:
The invention applies separation only where necessary - at the final product output stage rather than at the recycling input stage. This localized application of separation maintains product purity for downstream processes while avoiding the complexity of separating streams before recycling, thereby optimizing both purity and device 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
This approach increases electrolyzer efficiency by limiting excessive oxocarbon exposure, reduces energy consumption, and enhances product selectivity without additional separation stages, achieving higher purity and cost-effectiveness.
Implementation Method 1
membrane separators
Implementation Method 2
temperature swing adsorption separators
Implementation Method 3
pressure swing adsorption separators
Implementation Method 4
cryogenic separators
Implementation Method 5
lean oil separators
Data Source
AI summary
This disclosure relates to systems and methods for gas separation in oxocarbon electrolyzers. A disclosed method includes supplying an oxocarbon to an input stream of a cathode chamber of an oxocarbon electrolyzer, converting the oxocarbon to a product gas in the cathode chamber, obtaining an output stream, with the product gas and residual oxocarbon, from the oxocarbon electrolyzer, and recycling a portion of the product gas, from the output stream, to the input stream.