The article doesn’t clearly say. It is noted that the argon and nitrogen from the incoming atmospheric air are being sold; it does not say how that separation process is being powered. We are left to assume (a bad strategy) that the plat is powering that process parasitically from their energy output.
Also woefully deficient, here, is the cavalier “Oh, we’ll get to that” handling of present-hour issues with the planned sequestration of CO2 in deep geological formations; and the offhand comment about earthquakes gave me a chuckle, as well.
More than likely; the plane will produce more CO2 than it can sell, sequestration plans won’t be ready to implement, and excess “captured” CO2 will end up getting released to atmosphere.
Most likely it's all smoke and mirrors.The laws of thermodynamics are inviolate. You cannot get more out than you put in.