Separated-Tank Water Electrolysis for Pure H2 and O2 Extraction
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Solution Overview
Problem
Current water electrolysis methods face challenges in safely and efficiently producing high-purity hydrogen (H2) and oxygen (O2) gases, as they can react explosively when mixed, and there is a need for a method to recycle used nickel-hydrogen rechargeable batteries while ensuring safe and high-purity gas extraction.
Innovation Solution
A water electrolysis apparatus and method that utilizes a power source, electrolytic solution, and tanks with positive and negative electrodes, where O2 gas is extracted from one tank and H2 gas from another, maintaining a voltage difference to control the electrolysis reaction, and allowing for the reuse of used nickel-hydrogen rechargeable batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If water electrolysis is performed to produce H2 gas and O2 gas, then hydrogen gas and oxygen gas are generated, but the gases can react explosively if mixed together
Solution Approach 1:
The water electrolysis apparatus is divided into two separate tanks: a first tank for producing and storing oxygen gas, and a second tank for producing and storing hydrogen gas. This segmentation physically separates the two gases, preventing their mixing and eliminating the explosive reaction risk while maintaining continuous production of both gases.
2Manufacturing precision
If water electrolysis is performed to produce high-purity H2 gas and O2 gas, then gas purity is improved, but safety risks increase due to potential explosive reactions
Solution Approach 1:
The apparatus segments the electrolysis system into two independent tanks, each dedicated to producing and storing a single gas type. This ensures high gas purity in each tank while simultaneously preventing explosive reactions by maintaining physical separation between H2 and O2 gases.
3Adaptability or versatility
If used nickel-hydrogen rechargeable batteries are recycled through water electrolysis, then resource utilization is improved, but complex electrode and tank management is required
Solution Approach 1:
The water electrolysis apparatus is designed to accept used nickel-hydrogen rechargeable batteries and repurpose their electrodes for continued water electrolysis. The first tank receives a positive electrode from a used battery, and the second tank receives a negative electrode, enabling the system to recycle battery materials while maintaining electrolysis functionality.
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
Enables safe and efficient extraction of high-purity H2 and O2 gases, effectively recycling used nickel-hydrogen rechargeable batteries by maintaining optimal voltage and electrolyte conditions, enhancing the efficiency and safety of the water electrolysis process.
Implementation Method 1
a water electrolysis reaction... separating water (H2O) into and recovering hydrogen (H2) gas and oxygen (O2) gas by a water electrolysis reaction
Data Source
AI summary
A water electrolysis apparatus includes: a power source; an electrolytic solution; a first tank immersed in the electrolytic solution and including a positive electrode connected to the power source, a supply opening and a discharge opening for H2O, and an O2 gas extraction opening; and a second tank immersed in the electrolytic solution and including a negative electrode connected to the power source, a supply opening and a discharge opening for H2O, and an H2 gas extraction opening. O2 gas is extracted from the first tank, and H2 gas is extracted from the second tank, by the power source maintaining voltage such that the potential of the positive electrode is higher than the potential of the negative electrode.