GE Vernova's hydrogen combustion solutions

Using hydrogen as a fuel for combustion offers significant benefits due to its low-emission characteristics. When combusted, hydrogen reacts with oxygen to produce water vapor as the primary byproduct, eliminating carbon dioxide (CO₂) emissions associated with fossil fuels. This reduction in greenhouse gases makes hydrogen a key player in decarbonizing power generation. Additionally, hydrogen's high energy density can facilitate efficient energy production, and existing gas turbines can be retrofitted to accommodate hydrogen blend fuel. This allows for existing power plants to be transitioned towards more sustainable energy sources, aligning with global efforts to achieve net-zero emissions.

Hydrogen combustion compares favorably to natural gas combustion in terms of emissions and can achieve comparable efficiency with proper system adaptations. Unlike natural gas, which emits carbon dioxide due to its hydrocarbon composition, hydrogen combustion produces only water vapor, eliminating CO₂ emissions entirely. However, hydrogen's higher flame temperature can lead to formation of additional nitrogen oxides (NOₓ) unless advanced combustion techniques are employed to mitigate this effect. GE Vernova supports these technologies like staged combustion and the use of diluents to effectively reduce NOₓ emissions.

Hydrogen combustion compares favorably to natural gas combustion in terms of emissions and can achieve comparable efficiency with proper system adaptations. Unlike natural gas, which emits carbon dioxide due to its hydrocarbon composition, hydrogen combustion produces only water vapor, eliminating CO₂ emissions entirely. However, hydrogen's higher flame temperature can lead to formation of additional nitrogen oxides (NOₓ) unless advanced combustion techniques are employed to mitigate this effect. GE Vernova supports these technologies like staged combustion and the use of diluents to effectively reduce NOₓ emissions.

Due to hydrogen's unique properties, several critical safety measures are necessary when using it in combustion processes. Hydrogen-specific leak detection systems are essential because it is colorless, odorless, and its small molecular size allows it to escape through openings that are too narrow for natural gas to leak through. Adequate ventilation is imperative to prevent the accumulation of leaked hydrogen gas, which has a wide flammability range (4–75% in air) and can readily form explosive mixtures. Materials and equipment must be carefully selected to prevent issues such as hydrogen embrittlement, including the use of appropriate metals and seals in storage tanks, pipelines, and combustion chambers. Flame arrestors and flashback preventers should be integrated into the combustion system to manage hydrogen's high flame speed and prevent flame propagation back into the fuel supply. Comprehensive safety protocols and personnel training are also critical to ensure proper handling, storage, and emergency response. Lastly, implementing advanced control systems can help monitor combustion conditions in real-time, maintaining safe operation by adjusting for hydrogen's rapid combustion kinetics.

Existing natural gas power plants can be adapted for hydrogen combustion with appropriate modifications. Necessary adaptations include upgrading fuel handling and storage systems to accommodate hydrogen's lower volumetric energy density and its tendency to leak due to its small molecular size. Combustion turbines must be retrofitted with specialized burners and materials to manage hydrogen's higher flame speed, wider flammability range, and to prevent issues like flashback and hydrogen embrittlement.