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Archive:000/Hydrogen gas: Difference between revisions
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(Created page with "Hydrogen gas (H2) is a fuel that when burned, produces no pollution and no carbon emissions - only water vapor (H2O). Just one problem: There are '''no''' natural resources of hydrogen gas. To make hydrogen gas, you need to use some other energy source. ==Production== ===Electrolysis=== Electricity can turn water (H2O) into hydrogen gas (H2) and oxygen gas (O2). The electricity could come from renewable sources such as solar, wind, or...") |
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The electricity could come from renewable sources such as [[solar]], [[wind]], or [[hydro]]. | The electricity could come from renewable sources such as [[solar]], [[wind]], or [[hydro]]. | ||
====Research needed==== | ====Research needed for this page==== | ||
Can electrolysis be done efficiently on a medium scale, for example using the energy from a rooftop of solar panels? | Can electrolysis be done efficiently on a medium scale, for example using the energy from a rooftop of solar panels? | ||
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===From fossil fuels=== | ===From fossil fuels=== | ||
Currently most hydrogen is produced from natural gas via [[wikipedia:steam reforming|steam reforming]], but this emits just as much CO2 as burning the natural gas itself. | |||
There's another (similar) process called [[methane cracking]] which takes in natural gas, and produces hydrogen gas + solid carbon (not CO2) which could be buried in the ground or used for something else. The main problem, currently, is that it takes more energy than you ultimately get from burning the hydrogen gas. In theory, it doesn't have to. {{p|Chemistry equations:<br />CH4 -> C + 2 H2 (endothermic: 74.850 kJ/mol)<br />2 H2 + O2 -> 2 H2O (exothermic: 285.820 kJ/mol)}} | |||
==Uses== | ==Uses== | ||