Jiwoong Lee, a chemist in the Department of chemistry at the University of Copenhagen, has developed a cutting-edge green technology that uses carbon dioxide to turn seawater into drinking water in just a few minutes. The planned desalination technology, which replaces electricity with carbon dioxide, could be used for survival equipment and large industrial plants in areas where people lack clean drinking water. < / P > < p > more than 800 million people worldwide have no access to clean drinking water. According to the United Nations, the number will increase to 3.3 billion by 2030. As seawater is already an important source of drinking water in many parts of the world, there is an increasing demand for more intelligent desalination methods. One of the basic challenges of modern desalination is energy consumption. Desalination plants use a lot of fossil fuel generated electricity, which in turn contributes to more severe climate change. < p > < p > jiwoong Lee of the Department of chemistry at the University of Copenhagen has developed a breakthrough technology that uses carbon dioxide to turn seawater into drinking water without the need for electricity. < / P > < p > & quot; it’s a bit like the sodastream machine in many people’s kitchens. You add some carbon dioxide to the water, and then you start a chemical process. But instead of carbonating bubbles with carbon dioxide, we use it to separate salt from water. &In addition to being a researcher and assistant professor in the Department of chemistry, he is also the founder and CSO of cowatech APS, a spin off of his invention patents. < / P > < p > the working principle of this technology is to add compound diamine into brine. The type of diamine used is carbon dioxide reactive, which means that when the substance comes into contact with carbon dioxide, its behavior can be controlled. The diamine combines with the added carbon dioxide, then absorbs the salt like a sponge, and then separates the salt. The whole process takes 1-10 minutes. Once carbon dioxide is removed, salt is released again – so chemicals can be reused for the next round of desalination. In the laboratory, 99.6% of salt in seawater can be removed by this method in principle. The technology is still under development, one of the aims is to reduce its price and optimize the recovery process with the lowest energy consumption. < / P > < p > & quot; I’ve always wanted to apply my chemistry research to the good. People usually associate chemistry with things that pollute water. But by using technologies that pollute our water, we can do the opposite. And we don’t emit carbon dioxide, we make good use of it. &Quot; jiwoong Lee said. < / P > < p > at present, this technology needs to be tested in a small scale. The experimental equipment is a water bottle with a specially designed filter, which can be used for lifeboats or as equipment for outdoor activities. Cowatech, in collaboration with engineering firm kapacitet A / s, has produced a prototype bottle that will be completed in 2-3 months. < / P > < p > in the long run, our goal is to apply the technology on a larger scale as an alternative to today’s desalination plants. The plan is to use the technology to supplement the RO plant, the dominant desalination method on the market. In doing so, cowatech expects to reduce energy consumption by 50%. < p > < p > Lee’s hope is that the technology will eventually be able to take advantage of carbon dioxide drawn from the atmosphere. Jiwoong Lee and his team have been nominated for the University of Copenhagen Innovation Award 2020. Global Tech

By ibmwl