Fig. 4: Dynamic cage occupancy of methane hydrate by in-situ Raman spectra analysis.
From: Rapid conversion of amino acid modified-ice to methane hydrate for sustainable energy storage
a Illustration of the experimental setup for in-situ Raman experiments, where the Raman probe is immersed in the tryptophan AM-Ice sample. b Time dependent Raman spectra obtained during methane hydrate formation with tryptophan AM-Ice under 272.7 K and 6 MPa. c Plot of area under the peak for CH4 in 51262, and the peak for both CH4 in 512 and CH4 gas. The ratio between the two peak areas is also presented. Error bars indicate the fitting error associated with peak deconvolution. The CH4 peak at 512 in the hydrate phase and CH4 gas peak are indistinguishable, given the resolution of the Raman setup.
