C02 is heavier than air, so... probably somewhat easily. If it's "rushing back in" at a truly significant rate, it probably wouldn't burn out.
It's not going to be perfect, of course, you're only burning things - tons of oxygen is left over, it's an imperfect process on its own. Achieving a perfectly-deoxygenated environment isn't the goal though, extending the wine is.
It's not going to be perfect, of course, you're only burning things - tons of oxygen is left over, it's an imperfect process on its own. Achieving a perfectly-deoxygenated environment isn't the goal though, extending the wine is.