What emission is produced by hydrogen fuel cells?

What emission is produced by hydrogen fuel cells?

• A. Carbon dioxide
• B. Methane
• C. Ammonia
• D. Water

Answer: (D)

Hydrogen fuel cells generate electricity by turning hydrogen and oxygen into water, releasing energy in the process. The direct reaction inside the cell produces water as the only emission (often as water vapor in the exhaust), along with heat. Because no carbon-containing fuel is burned, carbon dioxide, methane, or ammonia are not produced by the cell itself. If hydrogen is produced from other sources, there can be upstream emissions from that production, but the fuel cell’s direct emission is simply water.

Hydrogen fuel cells generate electricity by turning hydrogen and oxygen into water, releasing energy in the process. The direct reaction inside the cell produces water as the only emission (often as water vapor in the exhaust), along with heat. Because no carbon-containing fuel is burned, carbon dioxide, methane, or ammonia are not produced by the cell itself. If hydrogen is produced from other sources, there can be upstream emissions from that production, but the fuel cell’s direct emission is simply water.