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.

Plastics have been the preferred choice of material for the commercial production of the solar stills. However, most of the currently available solar stills are either too big or too small for satisfying drinking water needs of a single family. Furthermore, methods for increasing the production of water from a solar still are often difficult and costly to integrate in a solar still. Here, we show the effect of adding a plastic channels as passive condenser on an inflatable solar still. The still has a basin area of 1.8 m². The tests were performed in lab conditions at different water temperatures. The production of water achieved from the still at a water temperature of 73 ° C was 0.75  l/h. Furthermore, the production of water increased to more than 0.95  l/h with use of air flow over the the passive condenser to mimic wind or with use of wet tissue on the passive condenser to mimic evaporation cooling.