And there is another long-standing issue associated with burning liquid hydrogen, as while it may not produce CO2, it does still produce large amounts of nitrogen oxide (NOx), or more specifically the nasty greenhouse gas associated with VW’s dieselgate emissions scandal. BMW developed a limited-run version of a 7-series back in 2002 with a V12 engine converted to run on liquid hydrogen, but its fuel consumption was rated at around 50l/100kms or 4.7mpg, around four times higher than that of its petrol V12 counterpart.įrom an emissions perspective, the carbon footprint of producing that much fuel is extremely high per kg, which more than counteracted its lack of a CO2 output at the exhaust pipe. Autocar UK reported from the IAA 2021 reveal that the range of the BMW iX5 is 311 miles (500 km). BMW Group plans to launch the BMW iX5 in limited volumes in 2022. Rather it lies in compressed hydrogen’s poor energy density, which makes it burn very inefficiently. Filling up the hydrogen tanks takes only three to four minutes, making the refueling experience similar to a gasoline or diesel vehicle. The hydrogen rotary engine is extremely eco-friendly and perfect for a society in which people can continue to enjoy Zoom-Zoom driving. They are more efficient than conventional internal combustion engine vehicles and produce no. Running fuel in a pressurised circuit is not the issue – cars that burn compressed natural gas are common in Australia and Brazil. Fuel cell electric vehicles (FCEVs) are powered by hydrogen. In this process, liquid hydrogen is stored in an insulated and pressurised tank where it is injected directly into the cylinders at high pressure, burning in the same four-stroke cycle as a normal petrol engine. It sounds perfect, in theory, but the reality is quite different. Hydrogen combustion works, as its name suggests, in exactly the same way as fossil fuel combustion engines, but without the carbon emissions.
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