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High-temperature electrolysis schema. Decarbonization of Economy via hydrogen produced from HTE. High-temperature electrolysis (also HTE or steam electrolysis, or HTSE) is a technology for producing hydrogen from water at high temperatures or other products, such as iron or carbon nanomaterials, as higher energy lowers needed electricity to split molecules and opens up new, potentially better ...
Electrolysis of water at 298 K (25 °C) requires 285.83 kJ of energy per mole in order to occur, [6] and the reaction is increasingly endothermic with increasing temperature. However, the energy demand may be reduced due to the Joule heating of an electrolysis cell, which may be utilized in the water splitting process at high temperatures.
Water electrolysis can operate at 50–80 °C (120–180 °F), while steam methane reforming requires temperatures at 700–1,100 °C (1,300–2,000 °F). [52] The difference between the two methods is the primary energy used; either electricity (for electrolysis) or natural gas (for steam methane reforming).
High-temperature electrolysis (also HTE or steam electrolysis) is a method for the production of hydrogen from water with oxygen as a by-product.
In some cases, for instance, in the electrolysis of steam into hydrogen and oxygen at high temperature, the opposite is true and heat energy is absorbed. This heat is absorbed from the surroundings, and the heating value of the produced hydrogen is higher than the electric input.
The U.S. Department of Energy has awarded just under $14 million for an attempt to build a hydrogen-energy production facility at a nuclear power plant in Minnesota with the help of a nuclear ...
The process consists of a pressurized high-temperature steam electrolysis and a pressurized CO 2-methanation module. The project was completed in 2017 and achieved an efficiency of 76% for the prototype with an indicated growth potential of 80% for industrial scale plants. [35]
The LTS shift reactor operates at a range of 200–250 °C. The upper temperature limit is due to the susceptibility of copper to thermal sintering. These lower temperatures also reduce the occurrence of side reactions that are observed in the case of the HTS. Noble metals such as platinum, supported on ceria, have also been used for LTS. [10]