This innovative technology installs directly onto an automobile and uses a redesigned exhaust system to capture CO2 at the source: the gases that are produced after combustion.
The technology is powered by the heat that the engine produces during combustion, and is designed so that captured CO2 is stored onboard the vehicle and offloaded during refueling stops.
The first step in the mobile carbon capture process developed by Aramco is to introduce a CO2 capture medium, such as a solution made from water and a basic nitrogen compound, into the exhaust gas stream. Once the exhaust gas comes into contact with the medium, the CO2 naturally binds to it and is absorbed into the medium.
This isolates and removes some of the CO2 from the remaining exhaust gases. The exhaust, with reduced CO2, can then be released, while the captured CO2 is stripped from the capture medium, compressed and stored onboard the vehicle until it is offloaded at a fuel station.
So what could be done with captured CO2? Captured CO2 could be utilized in industrial operations or stored underground through sequestration. Industrial uses potentially include Enhanced Oil Recovery, making new materials and lower-carbon fuels, growing algae, or enhancing plant growth in greenhouses. Sequestration could enable storage of large quantities underground where local utilization is a challenge.