Design and development of potassium formate based atmospheric water harvester

Potassium formate, the potassium salt of formic acid, is an inexpensive, non-corrosive, non-toxic, and bio-degradable desiccant that has not been considered thus far in atmospheric water harvesting applications.ster proposed utilizes aqueous solution formate as medium for moisture absorption during night when ambient relative humidity high, desorption absorbed from day using solar energy. A simple prototype was constructed able to extract 1.9 L water?m?2 area?day?1 with a uptake 0.34 kgwater?kgsalt?1at 25 °C 79% RH 0.29 kgwater?kgsalt?1 at 65% RH.