Li /ZSM-25 Zeolite as a CO2 Capture Adsorbent with High Selectivity and Improved Adsorption Kinetics, Showing CO2-Induced Framework Expansion
Jianhua Zhao, Ke Xie, Ranjeet Singh, Gongkui Xiao, Qinfen Gu, Qinghu Zhao, Gang Li, Penny Xiao, Paul A Webley
JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2018
The structure of ZSM-25, a RHO family zeolite, was resolved recently. Recent reports focused on Na-ZSM-25 as a promising CO2 adsorbent with high CO2 working capacity and exceptional CO2/CH4 ideal selectivity for pressure swing adsorption. However, these reports discuss single-gas adsorption performance of Na-ZSM-25 and are unable to provide the CO2/CH4 separation behavior in practical scenarios where the adsorption is performed using mixed gases. Furthermore, Na-ZSM-25 suffers from slow adsorption kinetics that limits its industrial applications. In this study, Li+/ZSM-25 zeolites (LZZs) are developed to enhance the CO2 adsorption kinetics without compromising selectivity. The adsorption per..View full abstract
Awarded by Australian Research Council
The authors acknowledge use of facilities within the Monash X-ray Platform and MCEM Monash facilities. In addition, this research used equipment (D8 Advance, D8 Discover and N8 Horizon) funded by Australian Research Council grant LE130100072. The authors appreciate the Australian Synchrotron for the assistance with in situ XRD and Bio21 Advanced Microscopy Facility for the material characterization. The authors also acknowledge the use of the dynamic column breakthrough apparatus in the fluids science & resources research group, The University of Western Australia.