Sure. The trick is that there are regenerative chemical substrates. The material absorbes co2, gets saturated, cycled to a different part where it is heated and

Sure. The trick is that there are regenerative chemical substrates. The material absorbes co2, gets saturated, cycled to a different part where it is heated and releases the co2 and can be used to capture again. If you use electricity to do the heating and cycling you have exactly what you asked for. On the other hand these units are usually not small or portable. Here is a press release from a manufacturer: https://www.naval-technology.com/contractors/materials/atmosphere-control-international/ https://www.naval-technology.com/contractors/materials/atmos...