Cheaper method to capture carbon dioxide could shake up industry

Scientists have created a guanidinium sulfate salt that can capture and store CO₂ at ambient pressures and temperatures, with little energy input. The strategy could change how industry captures, transports and stores the gas.

An international team of scientists charged an aqueous Gua₂SO₄ solution with CO₂ and saw a single-crystalline guanidinium sulfate-based clathrate salt form at ambient conditions. Because the solution encased CO₂ without forming strong bonds with the carbon dioxide, researchers were able to easily reverse the process to release the gas again.