Electrochemical Reactor Pressure Control for CO2 Reduction
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Solution Overview
Problem
The existing electrochemical reaction devices for artificial photosynthesis face challenges due to temperature fluctuations caused by Joule heat, which affect the solubility of carbon dioxide and the efficiency of carbon dioxide reduction, leading to decreased availability and utility value of the reduction products.
Innovation Solution
The electrochemical reaction device includes a first reactor with a cathode for reducing carbon dioxide and an anode for oxidizing water, along with a pressure adjuster and a temperature detector. The controller adjusts the pressure in the first reactor based on the detected temperature to maintain optimal conditions for carbon dioxide reduction, thereby stabilizing the production of carbon compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large amount of carbon dioxide is electrochemically reduced using renewable energy, then the production of carbon compounds increases, but temperature in the reactor increases due to Joule heat causing carbon dioxide solubility to decrease
Solution Approach 1:
The patent extracts the harmful effect of Joule heat by introducing a cooling system that removes excess heat from the reactor. The cooling system includes a cooling chamber surrounding the reaction chamber and a coolant circulation system that actively removes heat, thereby maintaining optimal temperature for carbon dioxide solubility while preserving high productivity
Solution Approach 2:
The patent changes the temperature parameter dynamically by implementing a temperature control system that adjusts cooling intensity based on real-time temperature monitoring. This allows the system to maintain optimal temperature conditions for carbon dioxide solubility even during high-rate electrochemical reduction, resolving the contradiction between productivity and temperature control
2Adaptability or versatility
If the applied potential to the cathode fluctuates due to weather changes, then the Joule heat fluctuates causing temperature to fluctuate, but this decreases the availability and utility value of reduction products
Solution Approach 1:
The patent implements a feedback control system that continuously monitors temperature and adjusts cooling intensity accordingly. When temperature rises due to Joule heat fluctuations from variable applied potential, the cooling system automatically increases its activity to maintain stable temperature, thereby stabilizing carbon dioxide solubility and reduction product quality despite external energy fluctuations
Solution Approach 2:
The patent prepares for potential temperature fluctuations by having a pre-configured cooling system ready to compensate for Joule heat generation. The cooling infrastructure is designed in advance to handle expected temperature variations from renewable energy fluctuations, cushioning against their adverse effects before they can significantly impact product quality
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 solution effectively stabilizes the production of carbon compounds by controlling temperature-induced fluctuations, enhancing the availability and utility value of the reduction products while maintaining efficiency in the electrochemical reaction.
Implementation Method 1
a cathode that reduces carbon dioxide and thereby produces a reduction product
Implementation Method 2
an anode that oxidizes water (H2O) to produce oxygen (O2)
Implementation Method 3
temperature in a reactor increases due to Joule heat
Data Source
AI summary
An electrochemical reaction device includes: a first reactor including a first room and a second room, the first room being configured to store a gas containing carbon dioxide or a first electrolytic solution containing carbon dioxide, and the second room being configured to store a second electrolytic solution containing water; a cathode disposed in the first room, the cathode being configured to reduce the carbon dioxide and thus produce a reduction product; an anode disposed in the second room, the anode being configured to oxidize the water and thus produce an oxidation product; a first pressure adjuster configured to adjust pressure in the first room; a temperature detector configured to detect a temperature in the first reactor to form a detection signal; and a controller configured to control the pressure adjuster in accordance with the detection signal from the temperature detector.