Under the skin: Is ammonia the key to cutting CO2? | Autocar

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Under the skin: Is ammonia the key to cutting CO2? | Autocar
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With ammonia's clean combustion and convenient chemistry, is it the key to cutting CO2?

Why does it work? A look at its chemical formula, NH3, gives the game away. Each molecule of ammonia contains one atom of nitrogen and three of hydrogen, making it a dense ‘hydrogen carrier’. So yes, when ammonia is combusted, the engine is essentially running on our old friend hydrogen.

The first is complicated and adds cost, and the second, to an extent, defeats the object as well as adding complexity. The first is a dual-fuel approach, retrofitting heavy-duty turbo diesels with a second set of injectors to inject gaseous ammonia as the main energy source. But Mahle Powertrain has also successfully run its single-cylinder research engine on pure gaseous ammonia using its innovative Mahle Jet Ignition system, doing away with fossil fuel as an ignition source. The MJI system produces ultra-clean combustion with little or no harmful pollutants such as NOx.

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