A dynamical and structural study of confined Methane Hydrate by SE-QENS, SE-SANS.

DOI

Bulk samples of methane hydrate at cryogenic temperatures have been shown to contain methane in the hydrate cage that is nearly in a state of free rotation. There is an interest in knowing if confinement of the hydrate in small pores modifies this rotational behaviour. It is proposed to make QENS measurements at ~5 K, ~50 Bar on methane hydrate samples in different pore diameter silicas (6, 10, 20, 50 nm diameter) to see if there is a dependence on confining geometry. Recent NMR relaxation measurements on confined methane hydrate have shown changes in the cage dynamics near the disassociation temperature. Thus spin-echo QENS measurements will also be made at a few temperatures near ~270K and ~50 Bar at longer timescales using OFFSPEC, to quantify these changes. Spin-echo SANS measurements will also be made to see if clumping / nodule formation is detectable.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24086363
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24086363
Provenance
Creator Dr Beau Webber; Dr Robert Dalgliesh; Professor Felix Fernandez-Alonso; Miss Kay Chan
Publisher ISIS Neutron and Muon Source
Publication Year 2014
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2011-07-06T08:23:18Z
Temporal Coverage End 2011-07-11T09:11:03Z