Hydrogen adsorption on Co2+ - and Ni2+- exchanged -US-Y and -ZSM-5. A combined sorption, DR UV–Vis, synchrotron XRD and DFT study

Date

2022-08-01

Author

Sarohan, Nurkan
Özbek, Murat Oluş
Kaya, Yasemin
Abdellatief, Mahmoud
İpek Torun, Bahar

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Hydrogen adsorption on Co2+and Ni2+exchanged Ultrastable-Y (US–Y) and ZSM-5 are investigated experimentally at 298K and up to 50bar as well as theoretically. The experimentally calculated initial isosteric heat of H2adsorption values are between −28 and −32kJ/mol for Ni2+-ZSM-5, -16kJ/mol for Co2+-ZSM-5, -23kJ/mol for Ni2+-US-Y and −18kJ/mol for Co2+-US-Y. Due to the optimumheat of adsorptionvalues observed on Co2+and Ni2+exchanged US-Y and ZSM-5, a reversiblevolumetricH2storage capacity of 20g H2/L is achieved on Ni2+-ZSM-5 at 298K and 50bar. The site information of Co2+and Ni2+cations are investigated using diffuse reflectance (DR) UV–Vis spectra, synchrotron powder X-ray Diffraction (XRD) as well as theoretical calculations using both periodic and cluster density functional theory (DFT) models for ZSM-5. Majority of Co2+and Ni2+cations are found at&#x3B2;" role="presentation" style="margin: 0px; padding: 0px; display: inline-block; line-height: normal; font-size: 16.2px; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; position: relative;">βand&#x3B3;" role="presentation" style="margin: 0px; padding: 0px; display: inline-block; line-height: normal; font-size: 16.2px; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; position: relative;">γ-sites in ZSM-5 and at Site III in US-Y.

URI

https://www.sciencedirect.com/science/article/pii/S0360319922031810?dgcid=author
https://hdl.handle.net/11511/99001

Journal

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

DOI

https://doi.org/10.1016/j.ijhydene.2022.07.130

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Department of Chemical Engineering, Article

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Citation Formats

N. Sarohan, M. O. Özbek, Y. Kaya, M. Abdellatief, and B. İpek Torun, “Hydrogen adsorption on Co2+ - and Ni2+- exchanged -US-Y and -ZSM-5. A combined sorption, DR UV–Vis, synchrotron XRD and DFT study,” INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol. 47, no. 75, pp. 32181–32201, 2022, Accessed: 00, 2022. [Online]. Available: https://www.sciencedirect.com/science/article/pii/S0360319922031810?dgcid=author.