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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2083
Title: Direct use of seawater for rapid methane storage via clathrate (sII) hydrates
Authors: Kumar A.
Veluswamy H.P.
Kumar R.
Linga P.
Published in: Applied Energy
Abstract: Storing natural gas in the form of clathrate hydrates (termed as Solidified Natural Gas, SNG) is highly advantageous as it is non-explosive, environmentally benign and offers compact mode of natural gas storage with high volumetric storage capacity. In this work, we demonstrate rapid methane storage in saline water (1.1 mol% NaCl solution) and seawater via clathrate hydrates aided by 5.56 mol% THF in a simple unstirred tank reactor. We report extremely fast hydrate formation kinetics with methane uptake of 89.2 (±2.4) v/v in 13.8 (±2.4) minutes with saline water and 86.3 (±4.3) v/v in 15.1 (±0.8) minutes with natural seawater (t90). This uptake corresponds to an yield of 77.6 (±2.2)% for saline water and 75.0 (±3.4)% for natural seawater system respectively for the stated hydrate growth time. Further, molecular insights of the mixed hydrate formation in presence of NaCl is derived through high-pressure calorimetry, in-situ Raman, and powder X-ray diffraction analysis. Finally, we demonstrate the stability of the hydrate pellet formed employing direct seawater in presence of THF for two weeks. The direct use of natural seawater makes the SNG technology highly attractive to store/transport methane for large-scale storage needs and for low capacity natural gas production facilities like biogas manufacturing plants. © 2018
Citation: Applied Energy(2019), 235(): 21-30
URI: https://doi.org/10.1016/j.apenergy.2018.10.085
http://repository.iitr.ac.in/handle/123456789/2083
Issue Date: 2019
Publisher: Elsevier Ltd
Keywords: Energy storage
Gas hydrates
In-situ Raman spectroscopy
Kinetics
Methane storage
Solidified natural gas
ISSN: 3062619
Author Scopus IDs: 55547117281
55603750900
53164128700
57189447961
Author Affiliations: Kumar, A., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117 585, Singapore
Veluswamy, H.P., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117 585, Singapore
Kumar, R., Department of Chemical Engineering, Indian Institute of Technology Madras, India
Linga, P., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117 585, Singapore
Funding Details: The 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. The EIRP is a competitive grant call initiative driven by the Energy Innovation Programme Office and funded by the National Research Foundation (NRF). Appendix A
Corresponding Author: Kumar, R.; Department of Chemical Engineering, Indian Institute of Technology MadrasIndia; email: rajnish@iitm.ac.in
Appears in Collections:Journal Publications [CH]

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