Hydrogen Purification Anode Pressure Cycling for Flow Path Blockage
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Solution Overview
Problem
In hydrogen purification modules, remaining gases and condensed water vapor in the anode flow path can prevent hydrogen from diffusing to the porous carbon electrode, reducing the efficiency of hydrogen purification.
Innovation Solution
A control method for a hydrogen purification system that includes a pressure control unit connected to the anode gas outflow path, which instantly increases and decreases the pressure of the anode, with a control unit controlling the pressure control unit to manage pressure changes of at least 0.04 bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrochemical reaction is performed to purify hydrogen in mixed gas, then hydrogen purification is achieved, but remaining gas and condensed water vapor block the anode flow path, reducing hydrogen diffusion and reaction efficiency
Solution Approach 1:
The patent applies periodic pressure changes to the anode flow path, cycling between pressure increase (to expel condensed water vapor and remaining gas) and pressure decrease (to restore normal flow). This periodic action prevents continuous blockage and maintains hydrogen diffusion efficiency throughout operation.
Solution Approach 2:
The patent changes the pressure parameter in the anode flow path as a control variable. By dynamically adjusting pressure levels, the system optimizes hydrogen diffusion while periodically removing accumulated water vapor and remaining gas that would otherwise block the flow path and reduce purification efficiency.
2Productivity
If pressure control unit is added to manage anode pressure, then hydrogen diffusion and reaction efficiency are improved, but system complexity increases
Solution Approach 1:
The patent implements a feedback control mechanism where the control unit monitors the operational state of the hydrogen purification module and automatically activates the pressure control unit when blockage is detected. This feedback-based approach improves purification efficiency only when needed, rather than continuously operating complex pressure control systems.
Solution Approach 2:
The system is designed to self-diagnose flow path blockage conditions and automatically initiate pressure control actions without external intervention. The control unit detects when remaining gas or water vapor blocks the anode flow path and autonomously activates the pressure control unit to restore proper hydrogen diffusion and reaction efficiency.
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 method improves the efficiency of hydrogen purification by removing remaining gases and water vapor from the anode flow path, enhancing hydrogen diffusion to the electrode and maintaining reaction sites.
Implementation Method 1
the pressure control unit is utilized to instantly increase and decrease the pressure of the anode in the hydrogen purification module
Implementation Method 2
prevent hydrogen in the mixed gas from diffusing to the porous carbon electrode
Implementation Method 3
an electric power is provided to the hydrogen purification module to perform an oxidation-reduction reaction of hydrogen
Implementation Method 4
the humidified water vapor in the mixed gas might condense in the flow path of the anode
Data Source
AI summary
Disclosed are a hydrogen purification system and a control method thereof. The hydrogen purification system includes a hydrogen purification module, a control unit, and a pressure control unit. The control unit is coupled to the pressure control unit, and the pressure control unit is connected to an anode gas outflow path of the hydrogen purification module. The control method includes the following steps. First, providing a mixed gas including hydrogen to the hydrogen purification module. Secondly, providing an electric power to the hydrogen purification module to perform an oxidation-reduction reaction of hydrogen. After that, utilizing the pressure control unit to instantly increase and decrease a pressure of an anode in the hydrogen purification module, wherein the control unit controls opening and closing of the pressure control unit. An instantaneous increase in the pressure of the anode in the hydrogen purification module is higher than or equal to 0.04 bar.