Dielectric Barrier Discharge Reactor for On-Demand Hydrogen Production
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Solution Overview
Problem
Current hydrogen production methods, such as steam reforming, catalytic partial oxidation, and auto-thermal reforming, are unsuitable for individual or decentralized hydrogen generation, requiring extensive infrastructure and high-pressure storage, which is impractical for point-of-use applications like individual fuel cell vehicles.
Innovation Solution
A dielectric barrier discharge (DBD) reactor for catalytic nonthermal plasma (CNTP) production of hydrogen from methane, which uses existing natural gas pipelines as a source material, allowing on-demand hydrogen production with a small footprint and efficient electrical power usage, featuring two reaction chambers with catalyst cages and steam generators for uniform plasma excitation and thermal energy utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If centralized hydrogen production methods (steam reforming, catalytic partial oxidation, auto-thermal reforming) are used, then high hydrogen production efficiency is achieved, but extensive distribution infrastructure and high-pressure storage facilities are required
Solution Approach 1:
The invention divides the hydrogen production system into distributed units that can be deployed at individual locations rather than centralized production facilities. Each unit uses a DBD reactor that can operate independently, eliminating the need for extensive distribution infrastructure while maintaining efficient hydrogen production capability.
Solution Approach 2:
The system uses existing natural gas pipeline infrastructure as both the fuel source and the distribution network, eliminating the need for separate high-pressure hydrogen storage and distribution facilities. The DBD reactor directly converts natural gas to hydrogen on-demand, making the system self-sufficient.
2Reliability
If high-pressure hydrogen storage facilities are built at point of generation and use, then hydrogen availability is improved, but cost and complexity increase significantly
Solution Approach 1:
The invention extracts the hydrogen production function from centralized facilities and implements it directly at the point of use. The DBD reactor converts natural gas to hydrogen on-demand, eliminating the need for high-pressure storage facilities while ensuring continuous hydrogen availability.
Solution Approach 2:
The system changes the operating parameters from high-pressure storage to low-pressure on-demand generation. The DBD reactor produces hydrogen at atmospheric pressure directly where needed, transforming the storage requirement into a production-on-demand model that eliminates complex storage infrastructure.
3Device complexity
If existing natural gas pipeline infrastructure is used for hydrogen production, then distribution cost is reduced, but hydrogen production scalability is limited
Solution Approach 1:
The DBD reactor system is designed to be dynamically scalable, allowing the number of reactors and their operating capacities to be adjusted based on demand. The system can operate at different power levels and can add or remove reactors from the network without requiring infrastructure changes, enabling flexible scalability while using existing gas pipelines.
4Productivity
If catalytic nonthermal plasma is used for hydrogen production, then on-demand production capability is achieved, but electrical power consumption increases
Solution Approach 1:
The DBD reactor uses periodic alternating current to generate plasma, which allows for efficient energy utilization. The periodic switching enables the reactor to maintain plasma generation with optimized power consumption, achieving on-demand hydrogen production while managing electrical energy usage through controlled periodic operation.
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 efficient, on-demand hydrogen production without the need for a separate distribution infrastructure, maximizing electrical and thermal energy use, achieving high conversion efficiencies and reducing the cost and complexity of hydrogen distribution.
Implementation Method 1
a chemical reaction is accomplished within a plasma environment wherein both reactants and catalysts are activated
Implementation Method 2
dielectric barrier discharge (DBD) reactor is used for catalytic nonthermal plasma production (CNTP) of hydrogen from methane
Implementation Method 3
catalytic nonthermal plasma production of hydrogen from methane
Implementation Method 4
steam generators for uniform plasma excitation and thermal energy utilization
Data Source
AI summary
A dielectric barrier discharge reactor for catalytic nonthermal plasma production of hydrogen from methane. The dielectric barrier discharge reactor includes two end pieces connected by a dielectric tube, two steam generators, two catalyst cages, two perforated tube center electrodes, a center electrode rod, a grounding electrode. In one aspect, the end pieces and the dielectric tube are fabricated from ceramic and fused quartz respectively. In another aspect, the dielectric barrier discharge reactor further includes catalyst cages. In yet another aspect, the catalyst cages contain catalysts in form of pellets. In an alternate aspect, the dielectric barrier discharge reactor acts to cause a reaction between incoming reactant gases. The reaction is achieved under a plasma which is generated between the perforated tubular center electrode and the ground electrode. In yet another alternate aspect, the dielectric barrier discharge reactor is used at home to generate hydrogen from methane.