Energy sources hydrogen fuel

Hydrogen, a fuel that releases a large amount of chemical energy when it bums, is used as an energy source in fuel cells. Use standard enthalpies of formation to calculate the change in mass that occurs when 1.00 mol of H2 is burned. 

As a clean energy source, hydrogen gas (H ) has potential if used in an electricity generating fuel cell (Caglar, 2003). Hj production by reforming of HC-based fuels in suitable fuel processors has become more and more important, in particular for both mobile and residential fuel cells applications (Specchia et al., 2005). 

Hydrogen as the most efficient and cleanest energy source for fuel-cell power is produced by partial oxidation followed by the water gas-shift reaction and reforming of hydrocarbons or methanol [58]. A small amount of CO (0.3-1%) in the so-produced H2 must be selectively removed because CO greatly poisons Pt/C and Pt-M/C electrocatalysts in proton-exchange-membrane (PEM) fuel cells [59, 60]. PROX of CO in excess H2 is a key reaction in the practical use of H2 in PEM fuel-cell systems. 

The International Code Council (ICC) is a joint venture of the three major code councils in the U.S., established to develop uniform national model building codes. The existing ICC model codes do not include hydrogen as an energy source or fuel cells as either power-generating devices or as appliances. To address this limitation, the ICC has established an Ad-Hoc Committee (HAHC) on hydrogen... 

Hydrogen is not the only energy source for fuel cells. There are many different types of fuel cells (e.g., solid oxide fuel cells and direct ethanol fuel cells) which do not use hydrogen. 

A transition from convenient but environmentally not so friendly, and ultimately scarce energy sources (fossil fuels) to less convenient, but clean and nonexhaustable ones (renewable energy sources) seems to be imminent. Hydrogen may play a significant role in this transition by allowing renewable energy sources to be used in virtually any application. 

The possibilities of new sources of energy, such as energy from hydrogen, may also some day become economical, and help to uncouple fossil fuel consumption from economic growth... 

If hydrogen is made from decarbonized fossil fuels, fuel-cycle emissions can be cut by up to 80 percent. With renewable energy sources such as biomass, solar, or wind, the fuel cycle greenhouse gas emissions are virtually eliminated. It is possible to envision a future energy system based on hydrogen and fuel cells with little or no emissions of pollutants or greenhouse gases in fuel production, distribution, or use. 

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