Sodium Hydride as Alternative Energy Having Hydrogen Absorption and Hydrogen Generation Functions and Hydrogen Fuel Cycl
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Sodium Hydride as Alternative Energy Having Hydrogen Absorption and Hydrogen Generation Functions and Hydrogen Fuel Cycle
Masataka Murahara1,2,3 and Toshio Ohkawara3 Innovative Research Initiatives, Tokyo Institute of Technology, Tokyo, Japan 2 Professor Emeritus of Tokai University, Tokyo, Japan 3 M Hikari & Energy Laboratory Co., Ltd., Kanagawa, Japan 1
ABSTRACT Hydrogen was converted to such a material as coal or oil with a low specific gravity so that it could be stored for a longer period and transported for a long distance at room temperature and under atmospheric pressure; which is sodium metal or sodium hydride. Sodium metal is produced with molten-salt electrolysis from seawater by wind power and transported to a thermoelectric power station in the consumption place for hydrogen-fueled combustion power generation. Sodium hydroxide, a waste, is re-electrolyzed to produce sodium for hydrogen generation; which constructs a hydrogen fuel cycle. This hydrogen fuel cycle is a clean, environmentally friendly recycle system that never requires repeated supply of raw materials in the same manner as the nuclear fuel cycle. Sodium or sodium hydride is an alternative energy.
INTRODUCTION Wind power generation is influenced by the weather, and the net generation is not constant. If the wind energy is converted to some fuel, the uncertainness of the weather can be disregarded, and the long-term storage and long-distance transportation will be possible. Oil and coal, whose specific gravities are low, have reigned in fossil fuel, and they are kept well for long and transported for a long distance [1]. It is, then, considered to convert hydrogen into sodium metal. This sodium metal is produced by electrolyzing seawater salt or rock salt and stored in kerosene or light oil to transport to a consumption place; a large amount of hydrogen is generated instantaneously anywhere if water is added to the sodium metal [2], [3], [4], [5]. Furthermore, it is noteworthy that the melting point of sodium hydride produced when the water reacts with hydrogen gas in the process of manufacturing sodium metal is 800ºC, 8 times higher than that of sodium metal (98ºC); consequently, its handling risk becomes extremely lower. When adding water, the sodium hydride hydrolyzes vigorously to generate hydrogen as sodium metal does; the amount of the hydrogen generated is twice as large as the hydrogen produced by the reaction of sodium metal and water. That is to say, sodium hydride is a material that posses both functions of hydrogen absorption and hydrogen generation. By-products such as fresh water, hydrochloric acid, sulfuric acid, and magnesium produced in the process of manufacturing sodium metal from seawater as the raw material, and sodium hydroxide produced at the time of hydrogen generation are the things that have been produced by consuming a large amount of electricity. These by-products are obtained without using electric power. Nothing but these by-products will pay, and the economic effect is huge. The electricity to be consumed fo
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