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We can burn hydrogen which is generated from magnesium and water. The reaction between magnesium and water also generates heat. Through clever use of this heat, the hydrogen generated from the reaction can be burned to produce high-temperature, high-pressure steam. This steam can then be used to rotate turbine to obtain mechanical power, or it can be used for electrical power generation.
In this case, the amount of heat generated from 1kg of magnesium is 25 Mega Joules including the heat generated by burning hydrogen. Coal, on the other hand, generates 30 Mega Joules, which is slightly higher than that from magnesium. However, there is nothing useful remaining after coal is burned; it is not easy to dispose of cinder, and a large amount of carbon dioxide (CO₂) is produced as coal burns.
On the other hand, magnesium oxide, which is produced as magnesium burns (reacts with oxygen), can be recycled to obtain magnesium. The only substances that are produced through burning magnesium are magnesium oxide and water (generated through burning hydrogen) and there is no carbon dioxide emission. There may be a time in the future when magnesium is burned instead of coal at electrical power generation plants.

2 Comments to “Magnesium can be burned at power generation plants”

  1. [...] ○関連情報 ・マグネシウムは燃料である ・マグネシウム燃料電池 ・マグネシウムは火力発電所の燃料として使える ・マグネシウム製造には大量のエネルギーが必要 [...]

  2. [...] 「マグネシウムは火力発電所の燃料として使える」では、マグネシウムと水を反応させ、生じた熱で水素を燃やせることを紹介しました。発生する高温高圧の水蒸気によって、タービン [...]

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