Electrolysis System Using Iodide Oxidation for Hydrogen Purity
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Solution Overview
Problem
Conventional water electrolysis systems face high energy consumption due to slow oxygen evolution reactions at the anode, leading to impure hydrogen gas production as oxygen gas passes through the spacer between the anode and cathode.
Innovation Solution
An electrolysis system with an anode reaction chamber using iodide ions and a carbon material anode, performing iodide oxidation reactions, and a cathode reaction chamber producing hydrogen gas, separated by a spacer that prevents iodine and oxygen passage, reducing energy requirements and improving hydrogen purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional water electrolysis is performed at the anode, then hydrogen gas can be produced, but oxygen evolution reaction is too slow causing high energy consumption and oxygen gas passes through spacer reducing hydrogen purity
Solution Approach 1:
The patent changes the chemical parameter of the anode reaction by introducing iodide ions to replace conventional water electrolysis. This parameter change enables the anode to perform iodide oxidation instead of oxygen evolution, achieving lower operating voltage and higher energy efficiency while preventing oxygen from contaminating the hydrogen gas
Solution Approach 2:
The patent introduces iodide ions as an intermediary substance in the anode reaction chamber. These iodide ions act as a mediator that facilitates electron transfer at the anode through oxidation reactions, replacing the conventional slow oxygen evolution reaction and enabling more efficient hydrogen production at the cathode
2Use of energy by moving object
If iodide oxidation reaction is performed at the anode, then energy consumption is reduced and hydrogen purity is improved, but iodine may pass through spacer contaminating hydrogen gas
Solution Approach 1:
The patent applies local quality by making the spacer selectively permeable to different substances. The spacer is designed with specific properties that allow it to block iodine molecules and triiodide ions while permitting hydrogen ions to pass through, thereby locally controlling substance transport to prevent contamination while maintaining ionic conductivity
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 reduces energy consumption and enhances hydrogen gas purity by performing iodide oxidation reactions at lower voltages, avoiding oxygen evolution and maintaining high commercial value iodine production.
Implementation Method 1
the anode reaction chamber performs an iodide oxidation reaction
Implementation Method 2
the cathode reaction solution includes a hydrogen ion to produce hydrogen gas
Implementation Method 3
the spacer allows a cation or an anion to pass through
Data Source
AI summary
An electrolysis system is provided in some embodiments of the present disclosure, including an anode reaction chamber, a cathode reaction chamber and a spacer. The anode reaction chamber includes an anode reaction solution and an anode immersed in the anode reaction solution, in which the anode reaction solution includes an iodide ion, and a material of the anode includes a carbon material. The cathode reaction chamber includes a cathode reaction solution and a cathode immersed in the cathode reaction solution, in which the cathode reaction solution includes a hydrogen ion. The spacer separates the anode reaction chamber and the cathode reaction chamber, in which the spacer allows a cation or an anion to pass through, so that the anode reaction chamber and the cathode reaction chamber are electrically connected to each other.