Researchers distill the facts of a chemical separation process and upend a decades-old theory

Researchers from Yale and the University of Wisconsin-Madison have challenged the traditional understanding of organic solvent nanofiltration (OSN). They discovered that OSN operates via pressure changes rather than the previously believed solution-diffusion mechanism. This finding, confirmed through experiments and computer simulations, parallels earlier insights into reverse osmosis. Understanding the true mechanism of OSN could lead to optimized filter designs, enhancing separations and clean energy technologies.

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