Is this more efficient and different compared to biofuel production using corn? Both convert carbon in the air to carbon in a liquid fuel. Biofuels require the

Is this more efficient and different compared to biofuel production using corn? Both convert carbon in the air to carbon in a liquid fuel. Biofuels require the production of fertilizers etc. This membrane would require some energy source. The membrane would have to consume less energy than corn fertilizer / unit fuel produced to be effective. I wonder how this is less a gimmick compared to biofuel.