Solution
Example of power generation using off gas (hydrogen rich gas)
Refineries, steel mills, and chemical plants generate power on-site using off gas produced in their manufacturing processes or natural gas purchased from outside as fuel for gas turbines. As large amounts of heat and power are required for their manufacturing processes, many plants have started utilizing cogeneration systems. For achieving decarbonization, a shift of fuels from natural gas to hydrogen is one option. The H-25 gas turbine can help industrial users achieve carbon neutrality with its proven record of hydrogen-rich gas power generation.
FEATURES
A proven experience with hydrogen-rich fuel for half a century
Mitsubishi Power‘s gas turbines have a track record of more than 4.3 million accumulated hours with fuels with hydrogen content since the 1970s*. One of their features is their ability to use a wide range of calorific value gases as fuel. The H-25 gas turbine with a diffusion combustor was introduced commercially in 1988. Since then, around 200 units have been delivered throughout the world. This fleet of H-25 turbines have accumulated more than 1.7 million operating hours experience on some level of fuels with hydrogen content*. *Based on the statistics by Mitsubishi Power as of January 2023. Source is Mitsubishi Power and publicly available data.
Adaptability to fluctuations in natural gas and hydrogen co-firing ratio
H-25 gas turbine's diffusion combustor can support a wide range of changes in natural gas and hydrogen co-firing ratio, from zero to 100%. For instance, we have delivered the machine to a plant with fluctuation requirements ranging from 10% to 60%.
Off gas released from steel mill and chemical plant manufacturing processes sometimes contain high percentages of hydrogen. Since the composition of hydrogen in off gas varies from plant to plant, it is critical for the gas turbine to have flexibility in responding to variations in hydrogen content.
Demonstration for reducing risk of hydrogen combustion
Hydrogen is easy to ignite and combusts quickly, so advanced technologies are required to prevent explosions and flashbacks especially at start-up. Mitsubishi Power, through its many years of experience in hydrogen co-firing, has expertise and technologies for handling hydrogen, safely and efficiently. Mitsubishi Power has also applied this experience in hydrogen co-firing with diffusion combustors to the 100% hydrogen combustion of the multi-cluster combustor (DLN) currently under development. It will be put into operation after demonstration and rigorous testing are conducted at the Takasago Hydrogen Park.
