You can capture the CO2 and even separate the C and the O2 without using more energy than was released by the combustion for two reasons: 1. The hydrogen in th

You can capture the CO2 and even separate the C and the O2 without using more energy than was released by the combustion for two reasons: 1. The hydrogen in the fuel remains oxidized. 2. Captured carbon (compressed CO2 gas, solid carbon) is still at a lower energy state than the source fuel (octane, etc.)