Liwei Li and Saeid Khorsandi, Penn State (IMAGE) Penn State Caption Liwei Li (left) and Saeid Khorsandi (right) are two Penn State graduate students in petroleum and natural gas engineering who helped develop a method to enhance oil recovery and sequester carbon dioxide. On the monitors behind them are graphics from a research paper describing their model Credit Liwei Li, Penn State Usage Restrictions non commercial use only License Licensed 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.