Membraneless Electrochemical Flow-Through Reactor Design
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Solution Overview
Problem
Current electrolysis processes, particularly in the chlor-alkali industry, face challenges due to high costs and susceptibility to fouling of ion-selective membranes, as well as complex reactor designs, which hinder energy efficiency and material costs.
Innovation Solution
The development of membraneless electrolyzers using flow-through mesh electrodes and 3D printed reactors with porous electrodes, allowing for flow-induced product separation and reducing material and assembly costs, enabling efficient production of hydrogen, acid, and base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ion-selective membranes are used to separate anolyte and catholyte streams, then product separation is achieved, but material costs and susceptibility to fouling increase
Solution Approach 1:
The patent removes the ion-selective membrane component entirely from the electrolyzer system. Instead of using membranes for separation, the design extracts this function by relying on physical compartmentalization through flow channels and the natural flow patterns of electrolyte streams, thereby eliminating membrane-related costs and fouling issues while maintaining product separation efficiency
Solution Approach 2:
The patent introduces an intermediary substance (gel electrolyte or liquid electrolyte with specific flow characteristics) that mediates between the anode and cathode compartments. This intermediary enables ionic conduction and product separation without requiring a physical membrane barrier, thus reducing material costs and eliminating membrane fouling problems
2Use of energy by moving object
If membrane electrolyzers are used for chlor-alkali process, then energy efficiency is improved, but capital cost increases due to membrane expenses
Solution Approach 1:
The patent replaces expensive, durable membranes with cheaper, replaceable components such as gel electrolytes or simple flow channel structures. These cheaper components can be easily replaced when worn or contaminated, significantly reducing capital costs while maintaining the energy efficiency needed for industrial chlor-alkali production
Solution Approach 2:
The patent changes the physical state and flow parameters of the electrolyte system. By using gel electrolytes with specific viscosity and flow characteristics, or by optimizing liquid electrolyte flow rates and channel geometries, the system achieves efficient product separation and ionic conduction without membranes, thereby reducing capital costs while preserving energy efficiency
3Productivity
If diaphragms or mercury electrolytic cells are used, then base production is achieved, but health and environmental concerns arise
Solution Approach 1:
The patent removes hazardous materials (asbestos in diaphragms, mercury in electrolytic cells) from the base production process. By extracting these harmful substances and replacing them with safe alternatives like gel electrolytes or controlled liquid flow systems, the patent maintains base production capability while eliminating health and environmental hazards
Solution Approach 2:
The patent creates an inert or controlled chemical environment using gel electrolytes or carefully managed liquid electrolyte flows that prevent the formation of harmful byproducts and eliminate the need for toxic materials. This inert environment approach enables safe base production without the health and environmental risks associated with traditional diaphragms and mercury cells
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 membraneless electrolyzers achieve significant control over pH levels, reduce material and assembly costs, and provide a cost-effective alternative for producing chemicals with low CO2 emissions when powered by renewable energy, while maintaining high energy efficiency.
Implementation Method 1
this design employs flow-induced product separation in conjunction with porous mesh flow-through electrodes to separate oxidation and reduction products
Implementation Method 2
Electrolysis is a very important industrial process used to produce a variety of vital chemical building blocks
Implementation Method 3
porous mesh flow-through electrodes to separate oxidation and reduction products
Data Source
AI summary
Methods and systems for electrochemically producing at least one product are disclosed. In some embodiments, the systems include a membraneless electrochemical flow-through reactor. A pair of porous electrodes configured at an angle to each other is disposed within the reactor in a channel of flowing electrolyte including a target reactant. As the electrolyte stream flows through the porous electrodes, a voltage is applied across the electrodes, resulting in the generation of a catholyte effluent stream and an anolyte effluent stream Gaseous and/or liquid products may then be separated from these streams. The membraneless electrochemical flow-through reactor is an easy to design and assemble apparatus for a variety of electrochemical processes.