While the CEO isn't really clear in the article about the specific technology being used for the direct route, based on the other co-founders of the company and

While the CEO isn't really clear in the article about the specific technology being used for the direct route, based on the other co-founders of the company and their publication record, it's probably found in this 2020 Nature paper (see Figure 5, 'Reaction Scheme for CO2 hydrogenation to jet fuel range hydrocarbons): https://www.nature.com/articles/s41467-020-20214-z https://www.nature.com/articles/s41467-020-20214-z In the long run, international air travel is the most secure market for artificial photosynthesis-sourced long-chain hydrocarbons (rockets seem to be going to methane, though you can make RP-1 this way too). I do wonder how big a facility (counting all the wind turbines / solar panels / nuclear plants for the energy source) would be needed to provide all the fuel needed for a large busy international airport. (Heathrow consumes ~16,000 tons of jet fuel per day, for example).