In addition to hydrogen, the Fischer–Tropsch requires carbon monoxide and not carbon dioxide. It can be produced from carbon dioxide, it just requires even more

In addition to hydrogen, the Fischer–Tropsch requires carbon monoxide and not carbon dioxide. It can be produced from carbon dioxide, it just requires even more energy (comparable to hydrogen production from water) and potentially rare catalysts. Energy wise this process might still be favorable to producing biofuels from plants or algae, so I hope they're successful.