Hydrogen Engines

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At first sight it all seems perfect. Hydrogen engines seem clean and efficient, unlike their gasoline powered internal combustion engine counterparts. All is not as it seems, however, and on balance hydrogen engines are actually more polluting that gasoline engines.

This is because hydrogen is not a natural energy source like coal or oil, for example. It is an energy carrier in the way that a battery is. It has to be produced first, usually in power plants that use fossil fuels, which is why hydrogen engines are more polluting than gasoline engines over all.

The storage of hydrogen within a car is also an area of much research. Hydrogen gas is problematic to store and is usually stored as a liquid gas. It is still potentially dangerous though, more so that the usual storage of gasoline in a metal tank under a car.

Hydrogen fuel cells for use in hydrogen engines are costly to produce. They also lack strength and are fragile, making them not particularly suitable for use in the normal shaking, bumping, vibrating car of today, even on good roads.

Producing hydrogen on demand for use in hydrogen engines is something that is being looked into. This could be possible by producing hydrogen directly from water and the sun's rays using a metallic catalyst, but would have obvious drawbacks in darkness.

Hydrogen produced on demand to power hydrogen fuel cells is still being researched and may never fully work to the satisfaction of everyone. However, it would reduce pollution problems as it would cut out the need to have power plants producing hydrogen.

In some countries, notably Denmark and Iceland, renewable energies are being used to produce hydrogen. Iceland uses its natural supply of geothermal energy, while Denmark uses its readily available supply of wind. Hydrogen engines that utilize the hydrogen produced in this way are more environmentally friendly than their gasoline counterparts as the power plant producing the hydrogen does not itself create pollutants.

Hydrogen can also be used in an adapted internal combustion engine. It burns efficiently and feels little different from an engine using gasoline. These are not strictly speaking hydrogen engines, but rather hydrogen-boosted gasoline engines. The ways to do this vary from using the gasoline to produce a small amount of hydrogen, or by using water.

As far back as 1935, Henry Garrett took out a patent on an electrolytic carburetor. He produced HHO, or Brown's Gas, from water to boost the gasoline engine. He was effectively the first person to make a car run on water, though in actuality it ran on gasoline and a gas that is two parts hydrogen to one part oxygen.

Now there are a number of available instructions and kits for converting a normal internal combustion engine to be boosted by HHO. They are not hydrogen engines in the strict sense of the meaning, but their efficiency, considerable increase in mileage realized, and relatively low pollution levels make them very attractive indeed. This is especially so in a world where fuel prices are increasing every day.

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