Ordinary coal will save humanity from thirst
The proven reserves of coal in the world when used by burning will last for several hundred years, but the current “green agenda” makes this type of fossil irrelevant. At the same time, humanity is already facing an imminent shortage of drinking water. Scientists from the King Abdullah University of Science and Technology of Saudi Arabia have developed a technology that will be able to give all the suffering people a drink with the help of coal.
The development is based on a material called “carbonized pressed powder” (CPP), which is obtained by grinding coal and then pressing the resulting powder back into solid briquettes. The checkpoint has two significant advantages – large porosity and absorption area, plus it can be given arbitrary shapes. Saudi scientists combined it with cotton fibers to create the heart of a new desalination plant.
The checkpoint unit is placed in a container with saltwater 1.5 times its volume, while the upper part of the unit protrudes above the water. It is subjected to increased heating by the sun due to its black color, and in parallel, water is absorbed and lifted along the fibers to the top of the block. There, water in contact with the overheated part of the unit turns into steam, evaporates and condenses on the walls of the catching dome, from where it flows down the grooves into the storage.
To remove the accumulated salt from the checkpoint unit, simply rinse it in the same seawater. According to the calculations of the authors of the technology, the evaporation rate in their installation is three times higher than that of the most efficient modern systems, and the process itself is a third cheaper. Currently, together with the Dutch company PERA, a project is being developed for the construction of a test desalination plant for salt water in Brazil.