Remarkable isosteric heat of hydrogen adsorption on Cu(I)-exchanged SSZ-39

2020-12-01
İpek Torun, Bahar
Altiparmak, Ismihan
Hydrogen storage capacity on Cu(I)-exchanged SSZ-39 (AEI), -SSZ-13 (CHA) and Ultra stable-Y (USeY, FAU) at temperatures between 279 K and 304 K are investigated. The gravimetric hydrogen storage capacity values reaching 83 mmol H-2 g(-1) (at 279 K and 1 bar) are found to be comparable with the highest adsorption capacity values reported on metal-organic frameworks. The volumetric hydrogen storage capacity values; on the other hand, are found to be more than three times of those reported on metal-organic frameworks (0.57 g/L on Cu(I)-SSZ39 at 1 bar and 296 K vs. ca. 0.18 g/L on Co-2(m-dobdc) at 1 bar and 298 K (Kapelewski MT, Runcevski T, Tarver JD, Jiang HZH, Hurst KE, Parilla PA et al. Record High Hydrogen Storage Capacity in the Metal-Organic Framework Ni-2(m-dobdc) at Near-Ambient Temperatures. Chem Mater 2018; 30:8179e89)). The isosteric heat of adsorption values are calculated to be between 80 kJ mol(-1) and 49 kJ mol(-1) on Cu(I)-SSZ-39 and between 22 kJ mol(-1) and 15 kJ mol(-1) on Cu(I)-US-Y indicating H2 adsorption mainly at Cu(I) cations located at the eight-membered rings on Cu(I)-SSZ-39 and at six-membered rings on Cu(I)-US-Y. Hydrogen adsorption experiments performed at 77 K showed higher adsorption capacity values for Cu(I)-SSZ-39 at 1 bar, but Cu(I)-US-Y showed potential for hydrogen storage at higher pressure values. (c) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Citation Formats
B. İpek Torun and I. Altiparmak, “Remarkable isosteric heat of hydrogen adsorption on Cu(I)-exchanged SSZ-39,” pp. 34972–34982, 2020, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/70192.