MANY MINDEDA graphene sieve separates solvent from water without boiling it
A team led from KU Leuven, working with the University of Bath's Department of Chemical Engineering, has published a graphene-oxide membrane that separates water from industrial solvents without distillation. The work appeared in Nature Communications in 2026, under DOI 10.1038/s41467-026-72660-w.
The membrane's pore structure is engineered to let water pass while blocking larger molecules. Starting from a mixture of 90 percent isopropanol and 10 percent water, it produces a stream that is about 99.6 percent water. The researchers report it works faster than existing techniques and uses less energy, principally because it does not depend on high temperatures the way distillation does.
The reason to care is the denominator. Chemical separation — pulling mixtures apart into their components — accounts for somewhere between 10 and 15 percent of all global energy use. Almost all of it is done by boiling things. Any method that separates at ambient temperature attacks a slice of world energy demand large enough to show up in national statistics, and it does so on the demand side, where a saved kilowatt-hour never needs generating, transmitting or storing.
The limits are stated plainly by the researchers. This is laboratory-scale work. No quantified energy saving, throughput rate or cost comparison has been published, so the size of the benefit is currently unmeasured. The team is exploring how to scale the technology and considering patent applications, and testing on other chemical mixtures is still to come.
Source: Phys.org