Governments need to move faster and more decisively on a wide range of policy measures to enable low-carbon hydrogen to fulfil its potential to help the world reach net zero emissions while supporting energy security, the International Energy Agency says in a new report.
Currently, global production of low-carbon hydrogen is minimal, its cost is not yet competitive, and its use in promising sectors such as industry and transport remains limited – but there are encouraging signs that it is on the cusp of significant cost declines and widespread global growth, according the IEA’s Global Hydrogen Review 2021.
When the IEA released its special report on The Future of Hydrogen for the G20 in 2019, only France, Japan and Korea had strategies for the use of hydrogen. Today, 17 governments have released hydrogen strategies, more than 20 others have publicly announced they are working to develop strategies, and numerous companies are seeking to tap into hydrogen business opportunities. Pilot projects are underway to produce steel and chemicals with low-carbon hydrogen, with other industrial uses under development. The cost of fuel cells that run on hydrogen continue to fall, and sales of fuel-cell vehicles are growing.
Hydrogen is light, storable and energy-dense, and its use as a fuel produces no direct emissions of pollutants or greenhouse gases. The main obstacle to the extensive use of low-carbon hydrogen is the cost of producing it. This requires either large amounts of electricity to produce it from water, or the use of carbon capture technologies if the hydrogen is produced from fossil fuels. Almost all hydrogen produced today comes from fossil fuels without carbon capture, resulting in close to 900 Mt of CO2 emissions, equivalent to the combined CO2 emissions of the United Kingdom and Indonesia.
Investments and focused policies are needed to close the price gap between low-carbon hydrogen and emissions-intensive hydrogen produced from fossil fuels. Depending on the prices of natural gas and renewable electricity, producing hydrogen from renewables can cost between 2 and 7 times as much as producing it from natural gas without carbon capture. But with technological advances and economies of scale, the cost of making hydrogen with solar PV electricity can become competitive with hydrogen made with natural gas, as set out in the IEA’s Roadmap to Net Zero by 2050.
Global capacity of electrolysers, which produce hydrogen from water using electricity, doubled over the last five years, with about 350 projects currently under development and another 40 projects in early stages of development. Should all these projects be realised, global hydrogen supply from electrolysers – which creates zero emissions provided the electricity used is clean – would reach 8 million tonnes by 2030. This is a huge increase from today’s level of less than 50,000 t – but remains well below the 80 Mt required in 2030 in the IEA pathway to net zero emissions by 2050.
Practically all hydrogen use in 2020 was for refining and industrial applications. Hydrogen can be used in many more applications than those common today, the report highlights. Hydrogen has important potential uses in sectors where emissions are particularly challenging to reduce, such as chemicals, steel, long-haul trucking, shipping and aviation.
The broader issue is that policy action so far focuses on the production of low-carbon hydrogen while the necessary corresponding steps that are required to build demand in new applications is limited. Enabling greater use of hydrogen in industry and transport will require much stronger policy measures to foster the construction of the necessary storage, transmission and charging facilities.
Countries with hydrogen strategies have committed at least USD 37 billion to the development and deployment of hydrogen technologies, and the private sector has announced additional investment of USD 300 billion. But putting the hydrogen sector on path consistent with global net zero emissions by 2050 requires USD 1,200 billion of investment between now and 2030, the IEA estimates.