Is Hydrogen Fuel the Answer?

Today, powering fuel cells with hydrogen can create more greenhouse gasses than powering directly from fossil fuels, because hydrogen is most often made using traditional gas- or coal-fired electricity. Today, renewable sources produce only 2% of the world’s electricity. Consider the math for a PEM based fuel cell car: Burning coal to generate one megawatt-hour of electricity produces about 2100 pounds of carbon dioxide. Using that electricity to make hydrogen would yield enough fuel for a fuel-cell [PEM] car to travel about 1,000 miles. But driving those 1,000 miles in a gasoline-powered car that gets 40 miles per gallon would produce just 485 pounds of carbon dioxide. From “Hell and Hydrogen”, David Talbot, Technology Review, March/April 2007

Of course, most cars today do not get 40 mpg, either…The point is, fuel-flexible SOFCs using traditional fuels like natural gas make less CO2 than hydrogen-burning PEMs (PEMs cannot operate easily from hydr…

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