>>2005067>Decarbonized natural gas>through pyrolysisThat may not be the most retarded commercialization of greenwashing I've ever seen, but it's certainly on the short list. I get that they're separating out elemental carbon, and that comes off as a solid, but I promise it's less energy efficient than just burning the methane.
Let's start with the energy sink a perfectly clean pyrolysis will give us (I assure you, they're not reaching 100% effeciency)
>Breaking C-H bonds (times 4 per molecule)414kJ/mol each, so it takes a total of 1656kJ per mole of natty gas consumed
>Forming H2 (twice per pyrolyzed molecule)436kJ/mol each, so it adds back a total of 872kJ per mole of natty gas consumed
>Net energy sink for pyrolysis784kJ per mole of natty gas pyrolyzed.
Now let's calculate energy delivered per mole of natty gas
>Breaking H-H bonds (twice per pyrolyzed natty gas molecule)872kJ per mole, from earlier
>Breaking O=O (one per mole of natty gas (2*H2 generated, gonna eat 1*O2)498kJ/mol
>Forming water molecules (H-O bonds)464kJ per bond per mole, so times 4 gives us 1856kJ/mol
>Net energy delivered for hydrogen486kJ/mol energy delivery for every mole of natty gas consumed
Let's compare it to the combustion of natural gas alone
>Breaking C-H1656kJ/mol
>Breaking O=O (gonna be two per natty gas for 2*H2O and CO2)498kJ/mol times 2 = 996kJ/mol
>Forming C=O1072kJ/mol (times 2) is 2144kJ/mol
>Forming water1856kJ/mol
>Add it up1348kJ/mol delivered per mole natty gas
So let's consider that. Comparing 1348kJ delivery vs 486kJ delivered (ignoring 784kJ of added processing) means using 2.77 times the amount of natural gas to heat anything.
