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Hydrogen production from natural gas tail gas

Composition of Natural Gas Tail Gas
Natural gas tail gas primarily consists of the following components:
• Unreacted natural gas: Mainly methane, with potential inclusions of ethane, propane, and others.
• Carbon monoxide: Produced during the combustion or conversion of natural gas.
• Carbon dioxide: A combustion product.
• Nitrogen: Nitrogen from the air may be mixed in.
• Small amounts of sulfides and nitrogen oxides: These components are harmful to the environment and require treatment.
Processes for Hydrogen Production from Natural Gas Tail Gas
Common processes for hydrogen production from natural gas tail gas include:
• Catalytic reforming: Natural gas tail gas reacts with steam under high temperature and pressure, undergoing a series of reactions catalyzed to produce hydrogen, carbon monoxide, and carbon dioxide.
• Partial oxidation: Under high temperature and pressure, natural gas tail gas reacts with partial oxygen to produce hydrogen, carbon monoxide, and a small amount of carbon dioxide.
• Methanation: The CO and CO₂ in natural gas tail gas are converted into methane, which is then subjected to steam reforming to produce hydrogen.
Advantages of Hydrogen Production from Natural Gas Tail Gas
• High resource utilization: Converting waste gas into valuable hydrogen improves resource utilization.
• Reduced pollution: Reduces emissions of natural gas tail gas, protecting the environment.