연구
Research Outcome
미래를 창조하는 포스텍 화학공학과
Abstract
Methane upgrading into more valuable chemicals has received much attention. Herein, we report oxidative methane conversion to ethane using gaseous O2 at low temperatures (<400 °C) and atmospheric pressure in a continuous reactor. A highly oxidized Pd deposited on ceria could produce ethane with a productivity as high as 0.84 mmol gcat−1 h−1. The Pd−O−Pd sites, not Pd−O−Ce, were the active sites for the selective ethane production at low temperatures. Density functional theory calculations confirmed that the Pd−O−Pd site is energetically more advantageous for C−C coupling, whereas Pd−O−Ce promotes CH4 dehydrogenation. The ceria helped Pd maintain a highly oxidic state despite reductive CH4 flow. This work can provide new insight for methane upgrading into C2 species.
DOI: doi.org/10.1002/cssc.201903311
Link: https://onlinelibrary.wiley.com/doi/10.1002/cssc.201903311