Air Purification that Also Generates PowerMay 08, 2017 by Jeff Shepard
Researchers from the University of Antwerp and KU Leuven have succeeded in developing a process that purifies air and, at the same time, generates power. The device must only be exposed to light in order to function.
â€œWe use a small device with two rooms separated by a membrane,â€ explains Professor Sammy Verbruggen (UAntwerp/KU Leuven). â€œAir is purified on one side, while on the other side hydrogen gas is produced from a part of the degradation products. This hydrogen gas can be stored and used later as fuel, as is already being done in some hydrogen buses, for example."
In this way, the researchers respond to two major social needs: clean air and alternative energy production. The heart of the solution lies at the membrane level, where the researchers use specific nanomaterials. â€œThese catalysts are capable of producing hydrogen gas and breaking down air pollution,â€ explains Professor Verbruggen. â€œIn the past, these cells were mostly used to extract hydrogen from water. We have now discovered that this is also possible, and even more efficient, with polluted air.â€
It seems to be a complex process, but it is not: the device must only be exposed to light. The researchersâ€™ goal is to be able to use sunlight, as the processes underlying the technology are similar to those found in solar panels. The difference here is that electricity is not generated directly, but rather that air is purified while the generated power is stored as hydrogen gas.
â€œWe are currently working on a scale of only a few square centimeters. At a later stage, we would like to scale up our technology to make the process industrially applicable. We are also working on improving our materials so we can use sunlight more efficiently to trigger the reactions. "