Friday, April 08, 2005

Hydrogen as a Fuel: Pipedream?

EnergyBulletin.net | Hydrogen economy: energy and economic black hole summarizes some of the efficiencies of going to hydrogen as a fuel. Since we have been making hydrogen for industrial purposes we know how to make it. The efficiencies:
72% efficiency if made from natural gas; 20% efficiency if made from water by hydrolysis using conventional electrical production; 25% efficiency from wind turbines.

So, we go to the hydrogen economy to reduce our dependence on oil and to reduce pollution. To do it, we need to reduce the efficiency of energy from natural gas by about 28%. Have you seen the price of natural gas lately, it isn't going down because there is no demand for it. We can produce hydrogen from electricity by using four times the energy we obtain from the product to produce it. We don't like coal because it produces CO2 and mercury. We don't like nuclear. That leaves (how many square miles) of wind turbines.

No one seems to mention that hydrogen is much more difficult to handle than petroleum-based fuels, is inherently less safe (see the warnings for recharging batteries) and would require extensive infrastructure additions to use. I'm not sure how we reduce our dependence on petroleum imports and reduce pollution by using something that requires more energy and fuel to produce.

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