Keeping carbon persistently out of the atmosphere would be hard, if you are freeing oxygen.
One alternative would be to make diamonds out of the extracted carbon and drop them to the ground. The released oxygen could then bind to crustal aluminum, iron, silicon, calcium, etc.
Venus has sadly little hydrogen, so you won't get oceans.
One alternative would be to make diamonds out of the extracted carbon and drop them to the ground. The released oxygen could then bind to crustal aluminum, iron, silicon, calcium, etc.
Venus has sadly little hydrogen, so you won't get oceans.