A team of researchers says it has demonstrated that discarded surgical masks can be converted into value-added chemicals through a pyrolysis thermal decomposition process. The international team of scientists was led by Professor Yong Sik Ok and Dr. Xiangzhou Yuan of Korea University, based in South Korea, who received great support from Professor Xun Hu of the University of Jinan in China and Professor Xiaonan Wang of the National University of Singapore and Beijing-based Tsinghua University.
The researchers found one set of pyrolysis conditions yielded a carbon-rich and oxygen-deficient liquid oil as the main product. Further analyses revealed this oil had a high heating value that “is only slightly lower than that of diesel fuel and gasoline.” In other words, the results showed that surgical masks can be converted into a burnable fuel that can in turn be used to generate electricity or in other applications.
“The results of the LCA were promising, indicating that the conversion of waste masks into electricity through pyrolysis offered better performance than most conventional waste management approaches on several fronts, including less CO2 emissions, less terrestrial ecotoxicity, and less phosphorous emissions,” state the report’s authors. “Understanding new ways to turn surgical masks into value-added energy products will help us mitigate plastic pollution and achieve sustainable waste-to-energy conversion in the future,” says Professor Ok. “The novel upcycling route proposed in our study could help us protect Earth’s ecosystems and reach several of the United Nation’s sustainable development goals.”
Source: Waste Today Magazine