期刊
CHEMICAL ENGINEERING JOURNAL
卷 354, 期 -, 页码 1075-1082出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.08.119
关键词
Metal-organic frameworks; Pellet; Adsorption; Separation; Ethylene; Polyvinyl butyral binder
资金
- Zhejiang Provincial Natural Science Foundation of China [LZ18B060001]
- National Natural Science Foundation of China [21725603, 21436010]
- National Program for Support of Top-notch Young Professionals
Four anion-pillared ultramicroporous powder (SIFSIX-3-Ni, SIFSIX-2-Cu-i, GEFSIX-2-Cu-i, TIFSIX-2-Cu-i) were shaped into pellets for the first time, using a strongly anti-tearing and highly sticky binder-polyvinyl butyral (PVB). PVB binder exhibited good compatibility and interaction with MOFs, which afforded the ultrahigh-loading of MOFs (up to 95%). Interestingly, this shaping method showed slight influence to the adsorption capacity of C2H2 (decreased by 0.56%-0.93%), while greatly hindered the adsorption of C2H4 (decreased by 5.0%-12.5%). These different influences resulted in the enhanced IAST selectivity (116.4) of GeFSIX-2-Cu-i pellet for the separation of C2H2/C2H4 (1: 99, v/v), which was 35% larger than the pure GeFSIX-2-Cu-i powder (86.3). Fixed-bed breakthrough experiments showed that SIFSIX-3-Ni pellets achieved the effective separation of C2H2/C2H4 (1: 99, v/v) mixtures. Furthermore, SO2 adsorption of SIFSIX-3-Ni pellets and GeFSIX-2-Cu-i pellets were obtained at 2000 ppm and 298 K. Remarkably, GeFSIX-2-Cu-i pellet had an excellent capacity of SO2 (95%-loading: 2.25 mmol g(-1); 90%-loading: 1.96 mmol g(-1)) at such a low pressure. Additionally, this approach was applied to other three typical MOFs HKUST-1, Mg-MOF-74, and MIL-101-Cr for CO2 capture. It revealed that the PVB binder was applicable to diverse MOFs for pelletization.
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