High-temperature gas cooled nuclear reactor coupled iodine selenium thermochemical cycle phosphorous reduction hydrogen production method

Abstract

The invention relates to an iodine selenium thermochemical cycle phosphorous reduction hydrogen production method, and belongs to the technical field of hydrogen energy. The method comprises the stepsthat water serves as a raw material, selenium and iodine are added for a reaction under normal pressure, and a seleninic acid solution and hydroiodic acid are obtained; the hydroiodic acid is rectified and concentrated, the rectified and concentrated hydroiodic acid is decomposed, hydrogen obtained after decomposition is output as a product, and iodine is recycled; a reducing agent white phosphorus or red phosphorus or phosphorus trioxide are added into the obtained seleninic acid solution, selenium and a by-product are obtained and output, and the selenium as the raw material is recycled. The highest temperature required by the reaction process in the method is 400-500 DEG C, and the problem is avoided that due to too high reaction temperature, large-scaled hydrogen production cannot beconducted. The reacting agent iodine and selenium in the method can be recycled, and accordingly, the hydrogen production cost is greatly reduced. The method can be well coupled with the latest cleanenergy, namely a high-temperature gas cooled nuclear reactor, the heat energy, electric energy and mechanical energy of the high-temperature gas cooled nuclear reactor can be utilized by the iodine selenium thermochemical cycle hydrogen production process.

Description

technical field [0001] The invention relates to a high-temperature gas-cooled reactor coupled iodine-selenium thermochemical cycle phosphorus reduction hydrogen production method, which belongs to the technical field of hydrogen energy. Background technique [0002] Hydrogen energy is an ideal clean secondary energy source. It is widely distributed and does not cause pollution when burned. Compared with electricity, hydrogen energy is easier to store and transport, and can be directly used as fuel. The energy system centered on hydrogen energy is increasingly valued. One of the most promising approaches is thermochemical cycle splitting of water to produce hydrogen. The current common thermochemical cycle hydrogen production method is sulfur iodine cycle hydrogen production, such as Chinese patent application (application publication number is CN104817057) discloses a method for thermochemical cycle hydrogen production, the method includes 3 chemical reactions, as follows S...

AI Technical Summary

Problems solved by technology

The disadvantage of the sulfur-iodide cycle hydrogen production method is that the decomposition reaction of sulfuric acid still requires a relatively high temperature, and it is still on a laboratory scale, which consumes a lot of energy and heat.