[riku_iki]

> so the cost of CO2 capture has to be well below $110/ton

they say $250/t in the article, but could you expand how you came to "A ton of natural gas requires 2.75 tons of CO2"? Where 1.75t of CO2 is disappearing in result?

[pfdietz]

Molecular weight of methane (CH4): 16

Molecular weight of CO2: 44

One molecule of CO2 is needed to get the carbon atom to make one molecule of methane.

44/16 = 2.75

The 1.75t of CO2 that went missing is the oxygen, which obviously isn't in the methane.

[riku_iki]

Thank you, I am an idiot in chemistry )