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Green hydrogen (GH2 or GH2) is hydrogen produced by the electrolysis of water, using renewable electricity. [1] [2] Production of green hydrogen causes significantly lower greenhouse gas emissions than production of grey hydrogen, which is derived from fossil fuels without carbon capture. [3]
Green hydrogen's principal purpose is to help limit global warming to 1.5 °C, reduce fossil fuel dependence by replacing grey hydrogen, and provide for an expanded set of end-uses in specific economic sectors, sub-sectors and activities. These end-uses may be technically difficult to decarbonize through other means such as electrification with renewable power. Its main applications are likely to be in heavy industry (e.g. high temperature processes alongside electricity, feedstock for production of green ammonia and organic chemicals, as direct reduction steelmaking), long-haul transport (e.g. shipping, aviation and to a lesser extent heavy goods vehicles), and long-term energy storage. [4]
As of 2021, green hydrogen accounted for less than 0.04% of total hydrogen production. [5] Its cost relative to hydrogen derived from fossil fuels is the main reason green hydrogen is in less demand. [6] For example, hydrogen produced by electrolysis powered by solar power was about 25 times more expensive than that derived from hydrocarbons in 2018. [7]
Most commonly, [8] green hydrogen is defined as hydrogen produced by the electrolysis of water, using renewable electricity. [1] [2] In this article, the term green hydrogen is used with this meaning.
Precise definitions sometimes add other criteria. The global Green Hydrogen Standard defines green hydrogen as "hydrogen produced through the electrolysis of water with 100% or near 100% renewable energy with close to zero greenhouse gas emissions." [9] [10]
A broader, less-used [8] definition of green hydrogen also includes hydrogen produced through various other methods that produce relatively low emissions and meet other sustainability criteria. For example, these production methods may involve nuclear energy or biomass feedstocks. [8] [11] [12]
Hydrogen can be produced from water by electrolysis. Electrolysis powered by renewable energy is carbon neutral. The Hydrogen Council said that, as of December 2023, manufacturers are preparing for a green hydrogen expansion by building out the electrolyzer pipeline by 35 percent to meet the needs of more than 1,400 announced projects. [13]
Biochar-assisted water electrolysis (BAWE) reduces energy consumption by replacing the oxygen evolution reaction (OER) with the biochar oxidation reaction (BOR). An electrolyte dissolves the biochar as the reaction proceeds. A 2024 study claimed that the reaction was 6x more efficient than conventional electrolysis, operating at <1 V, without O2 production using ~250 mA/gcat H2 current at 100% Faradaic efficiency. The process could be driven by small-scale solar or wind power. [14]
Cow manure biochar operated at only 0.5 V, better than materials such as sugarcane husks, hemp waste, and paper waste. Almost 35% of the biochar and solar energy was converted into hydrogen. Biochar production (via pyrolysis) is not carbon neutral. [14]
There is potential for green hydrogen to play a significant role in decarbonising energy systems where there are challenges and limitations to replacing fossil fuels with direct use of electricity.
Hydrogen fuel can produce the intense heat required for industrial production of steel, cement, glass, and chemicals, thus contributing to the decarbonisation of industry alongside other technologies, such as electric arc furnaces for steelmaking. [16] However, it is likely to play a larger role in providing industrial feedstock for cleaner production of ammonia and organic chemicals. [4] For example, in steelmaking, hydrogen could function as a clean energy carrier and also as a low-carbon catalyst replacing coal-derived coke. [17]
Hydrogen used to decarbonise transportation is likely to find its largest applications in shipping, aviation and to a lesser extent heavy goods vehicles, through the use of hydrogen-derived synthetic fuels such as ammonia and methanol, and fuel cell technology. [4] As an energy resource, hydrogen has a superior energy density (39.6 kWh) versus batteries (lithium battery: 0.15-0.25 kWh). [18] For light duty vehicles including passenger cars, hydrogen is far behind other alternative fuel vehicles, especially compared with the rate of adoption of battery electric vehicles, and may not play a significant role in future. [19]
Green hydrogen can also be used for long-duration grid energy storage, [20] [21] and for long-duration seasonal energy storage. [22] It has been explored as an alternative to batteries for short-duration energy storage. [23] [ better source needed ]
As of 2022, the global hydrogen market was valued at $155 billion and was expected to grow at an average (CAGR) of 9.3% between 2023 and 2030. [24] Of this market, green hydrogen accounted for about $4.2 billion (2.7%). [25] Due to the higher cost of production, green hydrogen represents a smaller fraction of the hydrogen produced compared to its share of market value. The majority of hydrogen produced in 2020 was derived from fossil fuel. 99% came from carbon-based sources. [26] Electrolysis-driven production represents less than 0.1% of the total, [27] of which only a part is powered by renewable electricity.
The current high cost of production is the main factor limiting the use of green hydrogen. A price of $2/kg is considered by many to be a potential tipping point that would make green hydrogen competitive against grey hydrogen. [28] [29] [30] It is cheapest to produce green hydrogen with surplus renewable power that would otherwise be curtailed, which favours electrolysers capable of responding to low and variable power levels (such as proton exchange membrane electrolysers). [31] : 5
The cost of electrolysers fell by 60% from 2010 to 2022, [32] and green hydrogen production costs are forecasted to fall significantly to 2030 and 2050, [31] : 26 driving down the cost of green hydrogen alongside the falling cost of renewable power generation. [33] [34] : 28 Goldman Sachs analysis observed in 2022, just prior to Russia's invasion of Ukraine that the "unique dynamic in Europe with historically high gas and carbon prices is already leading to green H2 cost parity with grey across key parts of the region", and anticipated that globally green hydrogen achieve cost parity with grey hydrogen by 2030, earlier if a global carbon tax were placed on grey hydrogen. [35]
As of 2021, the green hydrogen investment pipeline was estimated at 121 gigawatts of electrolyser capacity across 136 projects in planning and development phases, totaling over $500 billion.[ dubious – discuss ] [36] If all projects in the pipeline were built, they could account for 10% of hydrogen production by 2030. [36] The market could be worth over $1 trillion a year by 2050 according to Goldman Sachs. [37] An energy market analyst suggested in early 2021 that the price of green hydrogen would drop 70% by 2031 in countries that have cheap renewable energy. [38]
In 2020, the Australian government fast-tracked approval for the world's largest planned renewable energy export facility in the Pilbara region. In 2021, energy companies announced plans to construct a "hydrogen valley" in New South Wales at a cost of $2 billion to replace the region's coal industry. [39]
As of July 2022, the Australian Renewable Energy Agency (ARENA) had invested $88 million in 35 hydrogen projects ranging from university research and development to first-of-a-kind demonstrations. In 2022, ARENA is expected to close on two or three of Australia's first large-scale electrolyser deployments as part of its $100 million hydrogen deployment round. [40]
In 2024 Andrew Forrest delayed or cancelled plans to manufacture 15 million tonnes of green hydrogen per year by 2030. [41]
World Energy GH2's Project Nujio'qonik aims to be Canada's first commercial green hydrogen / ammonia producer created from three gigawatts of wind energy on the west coast of Newfoundland and Labrador, Canada. Nujio'qonik is the Mi'kmaw name for Bay St. George, where the project is proposed. Since June 2022, the project has been undergoing environmental assessment [42] according to regulatory guidelines issued by the Government of Newfoundland and Labrador.
Chile's goal to use only clean energy by the year 2050 includes the use of green hydrogen. The EU Latin America and Caribbean Investment Facility provided a €16.5 million grant and the EIB and KfW are in the process of providing up to €100 million each to finance green hydrogen projects. [43] [44]
In 2022 China was the leader of the global hydrogen market with an output of 33 million tons (a third of global production), mostly using fossil fuel. [45] As of 2021, several companies have formed alliances to increase production of the fuel fifty-fold in the next six years. [46]
Sinopec aimed to generate 500,000 tonnes of green hydrogen by 2025. [47] Hydrogen generated from wind energy could provide a cost-effective alternative for coal-dependent regions like Inner Mongolia. [48] As part of preparations for the 2022 Winter Olympics a hydrogen electrolyser, described as the "world's largest" began operations to fuel vehicles used at the games. The electrolyser was powered by onshore wind. [49]
Egypt has opened the door to $40 billion of investment in green hydrogen and renewable technology by signing seven memoranda of understanding with international developers in the fields. The projects located in the Suez canal economic zone will see an investment of around $12 billion at an initial pilot phase, followed by a further $29 billion, according to the country's Planning Minister, Hala Helmy el-Said. [50]
Germany invested €9 billion to construct 5 GW of electrolyzer capacity by 2030. [51]
Reliance Industries announced its plan to use about 3 gigawatts (GW) of solar energy to generate 400,000 tonnes of hydrogen. [52] Gautam Adani, founder of the Adani Group announced plans to invest $70 billion to become the world's largest renewable energy company, and produce the cheapest hydrogen across the globe. [53] The power ministry of India has stated that India intends to produce a cumulative 5 million tonnes of green hydrogen by 2030. [54]
In April 2022, the public sector Oil India Limited (OIL), which is headquartered in eastern Assam's Duliajan, set up India's first 99.99% pure green hydrogen pilot plant in keeping with the goal of "making the country ready for the pilot-scale production of hydrogen and its use in various applications" while "research and development efforts are ongoing for a reduction in the cost of production, storage and the transportation" of hydrogen. [55]
In January 2024, nearly 412,000 metric tons/year capacity green hydrogen projects were awarded to produce green hydrogen by the end of 2026. [56]
In 2023, Japan announced plans to spend US$21 billion on subsidies for delivered clean hydrogen over a 15-year period. [57]
Mauritania launched two major projects on green hydrogen. The NOUR Project would become one of the world's largest hydrogen projects with 10 GW of capacity by 2030 in cooperation with Chariot company. [58] The second is the AMAN Project, which includes 12GW of wind capacity and 18GW of solar capacity to produce 1.7 million tons per annum of green hydrogen or 10 million tons per annum of green ammonia for local use and export, in cooperation with Australian company CWP Renewables.
Namibia has commissioned a green hydrogen production project with German support. [59] The 10 billion dollar project involves the construction of wind farms and photovoltaic plants with a total capacity of 7 (GW) to produce. It aims to produce 2 million tonnes of green ammonia and hydrogen derivatives by 2030 and will create 15,000 jobs of which 3,000 will be permanent. [60]
An association of companies announced a $30 billion project in Oman, which would become one of the world's largest hydrogen facilities. Construction was to begin in 2028. By 2038 the project was to be powered by 25 GW of wind and solar energy. [61]
In April 2021, Portugal announced plans to construct the first solar-powered plant to produce hydrogen by 2023. [62] Lisbon based energy company Galp Energia announced plans to construct an electrolyser to power its refinery by 2025. [63]
In 2021, Saudi Arabia, as a part of the NEOM project, announced an investment of $5bn to build a green hydrogen-based ammonia plant, which would start production in 2025. [64]
Singapore started the construction of a 600 MW hydrogen-ready powerplant that is expected to be ready by the first half of 2026. [65]
In February 2021, thirty companies announced a pioneering project to provide hydrogen bases in Spain. The project intended to supply 93 GW of solar and 67 GW of electrolysis capacity by the end of the decade. [66]
In 2021, in collaboration with Expo 2020 Dubai, a pilot project was launched which is the first "industrial scale", solar-driven green hydrogen facility in the Middle East and North Africa." [67]
In August 2017, EMEC, based in Orkney, Scotland, produced hydrogen gas using electricity generated from tidal energy in Orkney. This was the first time that hydrogen has been created from tidal energy anywhere in the world. [68]
In March 2021, a proposal emerged to use offshore wind in Scotland to power converted oil and gas rigs into a "green hydrogen hub" which would supply fuel to local distilleries. [69]
In June 2021, Equinor announced plans to triple UK hydrogen production. [70] In March 2022 National Grid announced a project to introduce green hydrogen into the grid with a 200m wind turbine powering an electrolyser to produce gas for about 300 homes. [71]
In December 2023, the UK government announced a £2 billion fund would be setup to back 11 separate projects. The then Energy Secretary, Claire Coutinho announced the funding would be invested over a 15-year period. The first allocation round would be known as HAR1. [72] Vattenfall planned to generate green hydrogen from a test offshore wind turbine near Aberdeen in 2025. [73]
The federal Infrastructure Investment and Jobs Act, [74] which became law in November 2021, allocated $9.5 billion to green hydrogen initiatives. [75] In 2021, the U.S. Department of Energy (DOE) was planning the first demonstration of a hydrogen network in Texas. [76] The department had previously attempted a hydrogen project known as Hydrogen Energy California. Texas is considered a key part of green hydrogen projects in the country as the state is the largest domestic producer of hydrogen and has a hydrogen pipeline network. [77] In 2020, SGH2 Energy Global announced plans to use plastic and paper via plasma gasification to produce green hydrogen near Los Angeles. [78]
In 2021 then New York governor Andrew Cuomo announced a $290 million investment to construct a green hydrogen fuel production facility. [79] State authorities backed plans for developing fuel cells to be used in trucks and research on blending hydrogen into the gas grid. [80] In March 2022 the governors of Arkansas, Louisiana, and Oklahoma announced the creation of a hydrogen energy hub between the states. [81] Woodside announced plans for a green hydrogen production site in Ardmore, Oklahoma. [82] The Inflation Reduction Act of 2022 established a 10-year production tax credit, which includes a $3.00/kg subsidy for green hydrogen. [83]
In October 2023, Siemens announced that it had successfully performed the first test of an industrial turbine powered by 100 per cent green hydrogen generated by a 1 megawatt electrolyser. The turbine also operates on gas and any mixture of gas and hydrogen. [84]
In 2020, the European Commission adopted a dedicated strategy on hydrogen. [85] The "European Green Hydrogen Acceleration Center" is tasked with developing a €100 billion a year green hydrogen economy by 2025. [86]
In December 2020, the United Nations together with RMI and several companies, launched Green Hydrogen Catapult, with a goal to reduce the cost of green hydrogen below US$2 per kilogram (equivalent to $50 per megawatt hour) by 2026. [87]
In 2021, with the support of the governments of Austria, China, Germany, and Italy, UN Industrial Development Organization (UNIDO) launched its Global Programme for Hydrogen in Industry. [88] Its goal is to accelerate the deployment of GH2 in industry.
In 2021, the British government published its policy document, a "Ten Point Plan for a Green Industrial Revolution," which included investing to create 5 GW of low carbon hydrogen by 2030. [89] The plan included working with industry to complete the necessary testing that would allow up to 20% blending of hydrogen into the gas distribution grid by 2023. A BEIS consultation in 2022 suggested that grid blending would only have a "limited and temporary" role due to an expected reduction in the use of natural gas. [90]
The Japanese government planned to transform the nation into a "hydrogen society". [91] Energy demand would require the government to import/produce 36 million tons of liquefied hydrogen. At the time Japan's commercial imports were projected to be 100 times less than this amount by 2030, when the use of fuel was expected to commence. Japan published a preliminary road map that called for hydrogen and related fuels to supply 10% of the power for electricity generation as well as a significant portion of the energy for uses such as shipping and steel manufacture by 2050. [92] Japan created a hydrogen highway consisting of 135 subsidized hydrogen fuels stations and planned to construct 1,000 by the end of the 2020s. [93] [94]
In October 2020, the South Korean government announced its plan to introduce the Clean Hydrogen Energy Portfolio Standards (CHPS) which emphasizes the use of clean hydrogen. During the introduction of the Hydrogen Energy Portfolio Standard (HPS), it was voted on by the 2nd Hydrogen Economy Committee. In March 2021, the 3rd Hydrogen Economy Committee was held to pass a plan to introduce a clean hydrogen certification system based on incentives and obligations for clean hydrogen. [95]
Morocco, Tunisia, [96] Egypt [97] and Namibia have proposed plans to include green hydrogen as a part of their climate change agenda. Namibia is partnering with European countries such as Netherlands and Germany for feasibility studies and funding. [98]
In July 2020, the European Union unveiled the Hydrogen Strategy for a Climate-Neutral Europe. A motion backing this strategy passed the European Parliament in 2021. [99] The plan is divided into three phases. [100] From 2020 to 2024, the program aims to decarbonize existing hydrogen production. From 2024-2030 green hydrogen would be integrated into the energy system. From 2030 to 2050 large-scale deployment of hydrogen would occur. Goldman Sachs estimated hydrogen to 15% of the EU energy mix by 2050. [101]
Six European Union member states: Germany, Austria, France, the Netherlands, Belgium and Luxembourg, requested hydrogen funding be backed by legislation. [102] Many member countries have created plans to import hydrogen from other nations, especially from North Africa. [103] These plans would increase hydrogen production, but were accused of trying to export the necessary changes needed within Europe. [104] The European Union required that starting in 2021, all new gas turbines made in the bloc must be ready to burn a hydrogen–natural gas blend. [105]
In November 2020, Chile's president presented the "National Strategy for Green Hydrogen," stating he wanted Chile to become "the most efficient green hydrogen producer in the world by 2030". [106] The plan includes HyEx, a project to make solar based hydrogen for use in the mining industry. [107]
In the European Union, certified 'renewable' hydrogen, defined as produced from non-biological feedstocks, requires an emission reduction of at least 70% below the fossil fuel it is intended to replace. [108] This is distinct in the EU from 'low carbon' hydrogen, which is defined as made using fossil fuel feedstocks. [109] For it to be certified, low carbon hydrogen must achieve at least a 70% reduction in emissions compared with the grey hydrogen it replaces. [109]
In the United Kingdom, just one standard is proposed, for 'low carbon' hydrogen. Its threshold GHG emissions intensity of 20gCO2 equivalent per megajoule [110] should be easily met by renewably-powered electrolysis of water for green hydrogen production, but has been set at a level to allow for and encourage other 'low carbon' hydrogen production, principally blue hydrogen. [111] Blue hydrogen is grey hydrogen with added carbon capture and storage, which to date has not been produced with carbon capture rates in excess of 60%. [112] To meet the UK's threshold, its government has estimated that an 85% carbon capture rate would be necessary. [113]
In the United States, planned tax credit incentives for green hydrogen production are to be tied to the emissions intensity of 'clean' hydrogen produced, with greater levels of support on offer for lower greenhouse gas intensities. [114]
In chemistry and manufacturing, electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential. The word "lysis" means to separate or break, so in terms, electrolysis would mean "breakdown via electricity."
Steelmaking is the process of producing steel from iron ore and/or scrap. In steelmaking, impurities such as nitrogen, silicon, phosphorus, sulfur, and excess carbon are removed from the sourced iron, and alloying elements such as manganese, nickel, chromium, carbon, and vanadium are added to produce different grades of steel.
Syngas, or synthesis gas, is a mixture of hydrogen and carbon monoxide, in various ratios. The gas often contains some carbon dioxide and methane. It is principally used for producing ammonia or methanol. Syngas is combustible and can be used as a fuel. Historically, it has been used as a replacement for gasoline, when gasoline supply has been limited; for example, wood gas was used to power cars in Europe during WWII.
The hydrogen economy is an umbrella term for the roles hydrogen can play alongside low-carbon electricity to reduce emissions of greenhouse gases. The aim is to reduce emissions where cheaper and more energy-efficient clean solutions are not available. In this context, hydrogen economy encompasses the production of hydrogen and the use of hydrogen in ways that contribute to phasing-out fossil fuels and limiting climate change.
The methanol economy is a suggested future economy in which methanol and dimethyl ether replace fossil fuels as a means of energy storage, ground transportation fuel, and raw material for synthetic hydrocarbons and their products. It offers an alternative to the proposed hydrogen economy or ethanol economy, although these concepts are not exclusive. Methanol can be produced from a variety of sources including fossil fuels as well as agricultural products and municipal waste, wood and varied biomass. It can also be made from chemical recycling of carbon dioxide.
Electrolysis of water is using electricity to split water into oxygen and hydrogen gas by electrolysis. Hydrogen gas released in this way can be used as hydrogen fuel, but must be kept apart from the oxygen as the mixture would be extremely explosive. Separately pressurised into convenient 'tanks' or 'gas bottles', hydrogen can be used for oxyhydrogen welding and other applications, as the hydrogen / oxygen flame can reach approximately 2,800°C.
Hydrogen gas is produced by several industrial methods. Nearly all of the world's current supply of hydrogen is created from fossil fuels. Most hydrogen is gray hydrogen made through steam methane reforming. In this process, hydrogen is produced from a chemical reaction between steam and methane, the main component of natural gas. Producing one tonne of hydrogen through this process emits 6.6–9.3 tonnes of carbon dioxide. When carbon capture and storage is used to remove a large fraction of these emissions, the product is known as blue hydrogen.
The energy policy of the European Union focuses on energy security, sustainability, and integrating the energy markets of member states. An increasingly important part of it is climate policy. A key energy policy adopted in 2009 is the 20/20/20 objectives, binding for all EU Member States. The target involved increasing the share of renewable energy in its final energy use to 20%, reduce greenhouse gases by 20% and increase energy efficiency by 20%. After this target was met, new targets for 2030 were set at a 55% reduction of greenhouse gas emissions by 2030 as part of the European Green Deal. After the Russian invasion of Ukraine, the EU's energy policy turned more towards energy security in their REPowerEU policy package, which boosts both renewable deployment and fossil fuel infrastructure for alternative suppliers.
The energy policy of India is to increase the locally produced energy in India and reduce energy poverty, with more focus on developing alternative sources of energy, particularly nuclear, solar and wind energy. Net energy import dependency was 40.9% in 2021-22. The primary energy consumption in India grew by 13.3% in FY2022-23 and is the third biggest with 6% global share after China and USA. The total primary energy consumption from coal, crude oil, natural gas, nuclear energy, hydroelectricity and renewable power is 809.2 Mtoe in the calendar year 2018. In 2018, India's net imports are nearly 205.3 million tons of crude oil and its products, 26.3 Mtoe of LNG and 141.7 Mtoe coal totaling to 373.3 Mtoe of primary energy which is equal to 46.13% of total primary energy consumption. India is largely dependent on fossil fuel imports to meet its energy demands – by 2030, India's dependence on energy imports is expected to exceed 53% of the country's total energy consumption.
The production of renewable energy in Scotland is a topic that came to the fore in technical, economic, and political terms during the opening years of the 21st century. The natural resource base for renewable energy is high by European, and even global standards, with the most important potential sources being wind, wave, and tide. Renewables generate almost all of Scotland's electricity, mostly from the country's wind power.
Renewable energy in Australia is mainly based on biomass, solar, wind, and hydro generation. Over a third of electricity is generated from renewables, and is increasing, with a target to phase out coal power before 2040. Wind energy and rooftop solar have particularly grown since 2010. The growth has been stimulated by government energy policy in order to limit the rate of climate change in Australia that has been brought about by the use of fossil fuels. Pros and cons of various types of renewable energy are being investigated, and more recently there have been trials of green hydrogen and wave power.
Iceland is a world leader in renewable energy. 100% of the electricity in Iceland's electricity grid is produced from renewable resources. In terms of total energy supply, 85% of the total primary energy supply in Iceland is derived from domestically produced renewable energy sources. Geothermal energy provided about 65% of primary energy in 2016, the share of hydropower was 20%, and the share of fossil fuels was 15%.
Fossil fuel phase-out is the gradual reduction of the use and production of fossil fuels to zero, to reduce deaths and illness from air pollution, limit climate change, and strengthen energy independence. It is part of the ongoing renewable energy transition, but is being hindered by fossil fuel subsidies.
Energy in Austria describes energy and electricity production, consumption and import in Austria. Austria is very reliant on hydro as an energy source, supported by imported oil and natural gas supplies. It is planned by 2030 to become 100% electricity supplied by renewable sources, primarily hydro, wind and solar.
Electrofuels, also known as e-fuels, are a class of synthetic fuels which function as drop-in replacement fuels for internal combustion engines. They are manufactured using captured carbon dioxide or carbon monoxide, together with hydrogen obtained from water split. Electrolysis is possible with both traditional fossil fuel energy sources, as well as low-carbon electricity sources such as wind, solar and nuclear power.
Carbon Recycling International (CRI) is an Icelandic limited liability company which has developed a technology designed to produce renewable methanol, also known as e-methanol, from carbon dioxide and hydrogen, using water electrolysis or, alternatively, hydrogen captured from industrial waste gases. The technology is trademarked by CRI as Emissions-to-Liquids (ETL) and the renewable methanol produced by CRI is trademarked as Vulcanol. In 2011 CRI became the first company to produce and sell liquid renewable transport fuel produced using only carbon dioxide, water and electricity from renewable sources.
ITM Power plc is an energy storage and clean fuel company founded in the UK in 2001. It designs, manufactures, and integrates electrolysers based on proton exchange membrane (PEM) technology to produce green hydrogen using renewable electricity and tap water. Hydrogen produced via electrolysis is used for mobility, Power-to-X, and industry.
Power-to-gas is a technology that uses electric power to produce a gaseous fuel. When using surplus power from wind generation, the concept is sometimes called windgas.
Proton exchange membrane(PEM) electrolysis is the electrolysis of water in a cell equipped with a solid polymer electrolyte (SPE) that is responsible for the conduction of protons, separation of product gases, and electrical insulation of the electrodes. The PEM electrolyzer was introduced to overcome the issues of partial load, low current density, and low pressure operation currently plaguing the alkaline electrolyzer. It involves a proton-exchange membrane.
Nel ASA is a Norwegian company founded in 1927 and based in Oslo. Nel is a global company providing solutions for the production, storage and distribution of hydrogen from renewable energy sources. Nel is listed in the OBX Index of the Oslo Stock Exchange. As of March 2020, the largest shareholder is Clearstream Banking S.A. with a stake of 44.81%.