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Energy production through hydrogen combustion Featured science projectScience project video

Observation

The results show that no combustion took place for hydrogen foam bubbles that were less than 4mm in diameter. However, as the bubble size increased beyond  4 mm, combustion occured, with increasingly larger flames as the bubble diameter increased. When the size of the bubbles were more than 18mm, the combustion became explosive.
 

Hydrogen bubble size Combustion observed
Less than 1mm No combustion
2 to 3 mm No combustion
4 to 6 mm Mild combustion
8 to 15 mm Combustion with large flames
18 to 25mm Explosive combustion with large flames

 

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Complexity level:
8
Project cost ($):
100
Time required:
2 hours to prepare, 1 hour to conduct the science experiment
Material availability:
Hydrogen gas supplies can be obtained through your school laboratory
Safety concerns:

Suitably qualified persons are required to handle combustible gases and pressurized storage tanks. Safety goggles should be worn at all times. Fire safety precautions should be taken at all times.