Hydrogen production high-temperature

Plutonium reacts with hydrogen at high temperatures forming hydrides. With nitrogen, it forms nitrides, and with halogens, various plutonium hahdes form. Halide products also are obtained with halogen acids. Reactions with carbon monoxide yields plutonium carbides, whde with carbon dioxide, the products are both carbides and oxides. Such reactions occur only at high temperatures. 

Uranium dioxide occurs in mineral uraninite. Purified oxide may be obtained from uraninite after purification. The commercial material, however, also is recovered from other uranium sources. Uranium dioxide is obtained as an intermediate during production of uranium metal (See Uranium). Uranyl nitrate, U02(N03)2, obtained from digesting the mineral uraninite or pitchblende with concentrated nitric acid and separated by solvent extraction, is reduced with hydrogen at high temperatures to yield the dioxide. 

Naphthalene is produced from coal tar or petroleum. It is made from petroleum by dealkylation of methylnaphthalenes in the presence of hydrogen at high temperature and pressure. Petroleum was a major source of naphthalene until the 1980s, but now most naphthalene is produced from coal tar. The pyrolysis of bituminous coal produces coke and coke oven gases. Naphthalene is condensed by cooling the coke gas and then separated from the gas. Naphthalene production in the United States is slightly greater than 100,000 tons annually. 

Hexaalkyldisilanes, along with other products, are formed when tetra-alkylsilanes are heated with hydrogen at high temperatures and pressures (33, 87). 

NUCLEAR HYDROGEN USING HIGH TEMPERATURE ELECTROLYSIS AND LIGHT WATER REACTORS FOR PEAK ELECTRICITY PRODUCTION... 

Nuclear hydrogen using high temperature electrolysis and light water reactors for peak electricity production... 

At the same time, a project for a demonstration platform for validating the production of hydrogen by high-temperature processes and technologies (PROHYTEC) has succeeded in obtaining the financial support of the French authorities of the order of EUR 2 million in 2009. This paper illustrates the objectives, specifications and foreseen deployment of this platform. 

Trichlorosilane is used in the production of semiconductor grade silicon. By repeated distillation the content of boron or phosphorus impurities can be reduced to <0.1 ppb. Elemental silicon is obtained by reduction with hydrogen at high temperatures according to the idealized equation 6. 

Werkoff, E., Marechal, A., and Pra, F., Techno Economic Study on the Production of Hydrogen by High Temperature Steam Electrolysis, paper presented at the European Hydrogen Energy Conference, Grenoble, France, September 2003. 

Matsumoto, H., Okubo, M., Hamajina, S., Katahira, K., Iwahara, H. (2002). Extraction and production of hydrogen using high-temperature proton conductor. Solid State Ionics 152-3, 715-720. 

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