Abstract
The development of porous solids for adsorptive separation of propylene and propane remains an important and challenging line of research. State-of-the-art sorbent materials often suffer from the trade-off between adsorption capacity and selectivity. Here, we report the regulated separation of propylene and propane in a metal-organic framework via designed pore distortion. The distorted pore structure of HIAM-301 successfully excludes propane and thus achieved simultaneously high selectivity (>150) and large capacity (∼3.2 mmol/g) of propylene at 298 K and 1 bar. Dynamic breakthrough measurements validated the excellent separation of propane and propylene. In situ neutron powder diffraction and inelastic neutron scattering revealed the binding domains of adsorbed propylene molecules in HIAM-301 as well as host-guest interaction dynamics. This study presents a new benchmark for the adsorptive separation of propylene and propane.
| Original language | English |
|---|---|
| Pages (from-to) | 19300-19305 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 143 |
| Issue number | 46 |
| DOIs | |
| State | Published - Nov 24 2021 |
Funding
The authors would like to thank the financial support from the National Natural Science Foundation of China (21901166), the Guangdong Natural Science Foundation (2019A1515010692), and Shenzhen Science and Technology Program (No. JCYJ20190809145615620, RCYX20200714114539243). The authors are grateful to the STFC/ISIS Facility for access to Beamlines TOSCA and WISH. Work by the U.S. teams was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award DESC0019902.