Ethylene (IMAGE) University of Cincinnati Caption Chemical engineers at the University of Cincinnati led a national project to develop more efficient ways to convert carbon dioxide into ethylene. The system uses a doped carbon catalyst. Credit Andrew Higley Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.