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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/20395
Title: Stability analysis of methane hydrates for gas storage application
Authors: Bhattacharjee G.
Veluswamy, Hari Prakash
Kumar A.
Linga P.
Published in: Chemical Engineering Journal
Abstract: Solidified Natural Gas (SNG) technology offers an attractive option for compact and safe, large-scale natural gas storage. Gas storage technologies are gaining traction due to the increasing demand for natural gas and the expected transition to hydrogen gas-based economies in the near future. Introduction of thermodynamic promoters like THF into the classical methane-water system enables rapid gas uptake at moderate pressure and temperature due to sII hydrate formation, with highly stable storage characteristics. Herein, we compare the stability of cylindrical mixed methane-THF (sII) and pure methane (sI) hydrate pellets, produced using freshwater. Storage pressure for both types of pellets was 1 atmosphere (atm) whereas the storage temperature was 268 K for sII hydrate and 268 K and 253 K for sI hydrate. While only 7.06% gas evolution occured from a methane-THF (sII) hydrate pellet stored at 1 atm and 268 K over a 10 day period, % gas evolution from two pure methane (sI) hydrate pellets stored at 268 K for similar duration was 41.45% and 37.05% individually. Correspondingly, % gas evolution from an sI pellet stored at 253 K was 51.09%. We also report 2 year uninterrupted stability testing of methane-THF (sII) hydrate pellets produced using both fresh and seawater, stored at atmospheric pressure and temperatures of 271 K and 268 K, respectively. To the best of our knowledge, this is the longest successful storage demonstration of any type of methane hydrates ever reported, showcasing the extraordinary stability of sII hydrates produced using both fresh and seawater. The results obtained in the present study resolve the challenge of hydrate stability in SNG technology and strengthen its commercial viability by reducing downstream complications related to gas hydrate storage. © 2021 Elsevier B.V.
Citation: Chemical Engineering Journal, 415
URI: https://doi.org/10.1016/j.cej.2021.128927
http://repository.iitr.ac.in/handle/123456789/20395
Issue Date: 2021
Publisher: Elsevier B.V.
Keywords: Gas hydrate
Hydrate structure
Methane storage
Self-preservation
Stability
ISSN: 13858947
Author Scopus IDs: 56673926500
55603750900
55547117281
57189447961
Author Affiliations: Bhattacharjee, G., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore
Veluswamy, H.P., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore, Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Kumar, A., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore, Centre for Long Subsea Tiebacks, Department of Chemical Engineering, The University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia
Linga, P., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore
Funding Details: This work was funded in part under the Energy Innovation Research Programme (EIRP, Award No. NRF2015EWTEIRP002-002), administrated by the Energy Market Authority (EMA) of Singapore and MoE AcRF Tier 1 (R-279-000-542-114). The EIRP is a competitive grant call initiative driven by the Energy Innovation Programme Office, and funded by the National Research Foundation (NRF), Singapore. National Research Foundation Singapore, NRF; Ministry of Education - Singapore, MOE: R-279-000-542-114
Corresponding Author: Bhattacharjee, G.; Department of Chemical and Biomolecular Engineering, Singapore; email: chegaur@nus.edu.sg
Appears in Collections:Journal Publications [CH]

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