Surface Modification of Mesostructured Cellular Foam to Enhance Hydrogen Storage in binary THF/H2 Clathrate Hydrate

This study introduces solid-state tuning of a mesostructured cellular foam (MCF) to enhance hydrogen (H2) storage in clathrate hydrates Grafting of promoter-like molecules (e.g., Tetrahydrofuran), at the internal surface of the MCF resulted in a substantial improvement in the kinetics of formation o...

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Bibliographic Details
Published in:Sustainable Energy & Fuels
Main Authors: Kummamuru, N., Ciocarlan, R., Houlleberghs, Maarten, Martens, Johan, Breynaert, E., Verbruggen, S.W., Cool, P., Perreault, P.
Format: Article in Journal/Newspaper
Language:English
Published: Royal Society of Chemistry 2024
Subjects:
Science & Technology
Physical Sciences
Technology
Chemistry
Physical
Energy & Fuels
Materials Science
Multidisciplinary
METHANE HYDRATE
THERMODYNAMIC STABILITY
SECONDARY PROCESS
KINETICS
GROWTH
NUCLEATION
CAPACITY
HYDROGEN/TETRAHYDROFURAN
PARTICLES
CRYSTALS
3406 Physical chemistry
4004 Chemical engineering
4008 Electrical engineering
Methane hydrate
Online Access:https://lirias.kuleuven.be/handle/20.500.12942/739996
https://hdl.handle.net/20.500.12942/739996
https://lirias.kuleuven.be/retrieve/760710
https://doi.org/10.1039/D4SE00114A
https://pubmed.ncbi.nlm.nih.gov/38933237
Description
Summary:This study introduces solid-state tuning of a mesostructured cellular foam (MCF) to enhance hydrogen (H2) storage in clathrate hydrates Grafting of promoter-like molecules (e.g., Tetrahydrofuran), at the internal surface of the MCF resulted in a substantial improvement in the kinetics of formation of binary H2-THF clathrate hydrate. Identification of the confined hydrate as sII clathrate hydrate and enclathration of H2 in its small pores was performed using XRD and high-pressure 1H NMR spectroscopy respectively. Experimental findings show modified MCF materials to exhibit a ⁓ 1.3 times higher H2 storage capacity as compared to non-modified MCF under the same conditions (7 MPa, 265 K, 100% pore volume saturation with a 5.56 mol% THF solution). The enhancement in H2 storage is attributed to the hydrophobicity originating from grafting organic molecules onto pristine MCF, thereby influencing water interactions, and fostering an environment conducive to H2 enclathration. Gas uptake curves indicate an optimal tuning point for higher H2 storage, favoring a lower density of carbons/nm2. Furthermore, a direct correlation emerges between higher driving forces and increased H2 storage capacity, culminating at 0.52 wt.% (46.77 mmoles H2/moles H2O and 39.78% water-to-hydrate conversions) at 262 K for the modified MCF material with fewer carbons/nm2. Notably, the substantial H2 storage capacity achieved without energy-intensive processes underscores solid-state tuning's potential for H2 storage in the synthesized hydrates. This study evaluated two distinct kinetic models to describe hydrate growth in MCF. The multistage kinetic model showed better predictive capabilities for experimental data and maintained a low average absolute deviation. This research provides valuable insights into augmenting H2 storage capabilities and holding promising implications for future advancements. sponsorship: This work has received funding from the European Re-search Council (ERC) under grant agreement no. 834134 (WATUSO). The authors ...

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