Synthetic Gas Mixing Layout for Lower-Energy Hydrogen Compression
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Solution Overview
Problem
Existing devices for producing synthetic fuels require high technical device expenditure and energy consumption due to the low molecular mass of hydrogen, necessitating multiple compressor stages and significant energy input for compressing hydrogen gas to the required pressure level.
Innovation Solution
A device that splits the carbon dioxide flow into two parts, with one part expanded via a turbine and mixed with hydrogen before compression, while the other part bypasses the turbine and joins downstream, reducing the number of compressor stages and energy requirements by increasing the molecular mass of the mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If hydrogen gas is compressed directly to the required pressure level, then the synthetic gas mixture can be provided at the required pressure, but the technical device expenditure increases due to the low molecular mass of hydrogen requiring a large number of compressor stages
Solution Approach 1:
Carbon dioxide is introduced as an intermediary substance to mix with hydrogen before compression. This intermediary gas increases the molecular mass of the mixture, enabling more efficient compression with fewer compressor stages while still delivering the required pressure level for synthetic fuel production
Solution Approach 2:
The molecular mass parameter of the gas being compressed is changed by mixing hydrogen with carbon dioxide. This parameter change from pure hydrogen (low molecular mass) to a hydrogen-carbon dioxide mixture (higher molecular mass) reduces the complexity of the compression system
2Stress or pressure
If hydrogen gas is compressed to the required pressure level, then the synthetic gas mixture can be provided at the required pressure, but relatively much energy is required for compressing the hydrogen gas
Solution Approach 1:
Carbon dioxide serves as a mediator that reduces the energy required for compression. By mixing carbon dioxide with hydrogen before compression, the resulting mixture has higher molecular mass and is more efficiently compressed, significantly reducing the energy input needed compared to compressing pure hydrogen
Solution Approach 2:
Changing the composition parameter of the gas mixture to include carbon dioxide alters the compressibility characteristics, resulting in lower energy consumption during the compression process while maintaining the required output pressure
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 device efficiently provides a synthetic gas mixture of carbon dioxide and hydrogen at the required pressure level with lower technical device expenditure and energy costs, optimizing the compression process.
Implementation Method 1
a part mass flow turbine (14) for expanding the first part mass flow of at least carbon dioxide
Implementation Method 2
a compression device (17) for compressing the mixture provided by the first mixing device (16) of at least carbon dioxide and hydrogen to a third pressure level
Data Source
AI summary
A device providing a synthetic gas mixture, providing a mass flow of carbon dioxide at a first pressure level and a mass flow of hydrogen at a second pressure level, having a splitting device splitting the mass flow of carbon dioxide into a first and second part mass flow, a part mass flow turbine expanding the first part mass flow, a first mixing device mixing the expanded first part mass flow with the mass flow of hydrogen, a compression device compresses the carbon dioxide and hydrogen to a third pressure level, a bypass line that conducts the second part mass flow past the part mass flow turbine, the first mixing device and the compression device in the direction towards a second mixing device, to mix at the second mixing device the second part mass flow conducted via the bypass line with the mixture compressed by the compression device.