[DavidPBL]

We ferment CO2 + H2 rather than syngas (CO / CO + H2 / CO + H2 + CO2) but yes gas fermentation is not new technology.

Like traditional chemical processes which use metal catalysts, superior catalyst design improves the performance and ultimately the economics of the process.

Edit: I should have mentioned that it's not just the catalyst that has been improved, the design of the process itself has been improved. So upstream (gasification) and the design of the bioreactor also impact how well the process works.