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Hydrogen gas: Difference between revisions
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Currently most hydrogen is produced from [[natural gas]] via [//wikipedia.org/wiki/Steam_reforming steam reforming], but this emits just as much CO<sub>2</sub> as burning the natural gas itself. | Currently most hydrogen is produced from [[natural gas]] via [//wikipedia.org/wiki/Steam_reforming steam reforming], but this emits just as much CO<sub>2</sub> 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 CO<sub>2</sub>). The main problem is that it's a ''net loss'' of energy {{x|it takes more energy than you ultimately get by burning the hydrogen gas}}. In theory, it doesn't have to be. | There's another (similar) process called [[methane cracking]] which takes in natural gas, and produces hydrogen gas + solid carbon (not CO<sub>2</sub>). The main problem is that it's a ''net loss'' of energy {{x|it takes a lot more energy than you ultimately get by burning the hydrogen gas}}. In theory, it doesn't have to be. | ||
{{p|Chemistry equations:<br />CH<sub>4</sub> → C + 2 H<sub>2</sub> (endothermic: 74.850 kJ/mol)<br />2 H<sub>2</sub> + O<sub>2</sub> → 2 H<sub>2</sub>O (exothermic: 285.820 kJ/mol)}} | {{p|Chemistry equations:<br />CH<sub>4</sub> → C + 2 H<sub>2</sub> (endothermic: 74.850 kJ/mol)<br />2 H<sub>2</sub> + O<sub>2</sub> → 2 H<sub>2</sub>O (exothermic: 285.820 kJ/mol)}} | ||