Rapid Methane Storage in Seawater Via Clathrate Hydrates
23 Pages Posted: 12 Jul 2018 Publication Status: Review CompleteMore...
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 a relatively compact mode of natural gas storage with high volumetric storage capacity. Here for the first time, we demonstrate rapid methane storage in seawater and saline water (1.1 mol% NaCl solution) via clathrate hydrates aided by 5.56 mol% THF in a simple quiescent reactor configuration. We report extremely fast formation kinetics with methane uptake of 89.2 (±2.0) v/v and 88.0 (±5.4) v/v in saline water and seawater, respectively. Further, molecular insights of the hydrate formation in presence of NaCl is derived through high-pressure calorimetry, in-situ Raman, and powder X-ray diffraction analysis. Our findings render SNG technology very attractive to store/transport methane for large-scale storage needs and low production facilities like stranded gas fields or biogas manufacturing plants.
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