Accelerating Natural CO₂ Mineralization in a Fluidized Bed

Abstract

The presence of water (H₂O) is essential for the adsorption of carbon dioxide (CO₂) on the serpentine particles. However, the use of H₂O in the slurry bed columns requires high energy inputs to maintain the temperature during operation above ambient temperatures. Moreover, the separation, drying, handling, and processing of the product stream will pose challenges and cost even more energy. Here, we show the proof of principle of CO₂ sequestration on mineral particles in a fluidized bed using a moist CO₂ stream. The setup allows wetting of the particles while maintaining fluidization. The results show 50% mineral conversion and 40% CO₂ conversion in 8 min at 1 bar and 90 °C.