High temperature/pressure MAS-NMR for the study of dynamic processes in mixed phase systems
dc.contributor.author | Chamas, Ali | |
dc.contributor.author | Qi, Long | |
dc.contributor.author | Mehta, Hardeep | |
dc.contributor.author | Sears, Jesse | |
dc.contributor.author | Scott, Susannah | |
dc.contributor.author | Walter, Eric | |
dc.contributor.author | Hoyt, David | |
dc.contributor.department | Ames National Laboratory | |
dc.contributor.department | Ames Laboratory | |
dc.date | 2019-08-24T11:49:27.000 | |
dc.date.accessioned | 2020-06-29T23:22:21Z | |
dc.date.available | 2020-06-29T23:22:21Z | |
dc.date.issued | 2018-10-25 | |
dc.description.abstract | <p>A new MAS-NMR rotor (the WHiMS rotor) has been developed which can reach pressures of 400 bar at 20 °C or 225 bar at 250 °C. These rotors are ideal for mixed phase systems such as a reaction using a solid catalyst with a liquid/supercritical solvent topped with high pressure gas in the head space. After solid and liquid portions of the sample are loaded, the rotor is capped with an o-ring equipped polymer bushing that snaps into a mating groove in the rotor. The bushings incorporate a check valve into the sealing mechanism which allows for pressurization without mechanical manipulation – they will allow gas to flow in but not out. This WHiMS rotor design has enabled experiments on a wide variety of biotic and abiotic mixed-phase systems. Geochemical systems have also been studied, for example, adsorption and confinement studies of supercritical methane/CO2 in clays and other minerals which display pressure dependent 13C chemical shifts. Example data from other mixed-phase chemical and microbial systems are reported. These include monitoring metabolite conversion of extremophilic bacteria found in subsurface systems at elevated pressures and real-time operando reactions in catalysis systems - with liquid-quality resolution for 1H and 13C NMR spectra.</p> | |
dc.identifier | archive/lib.dr.iastate.edu/ameslab_manuscripts/332/ | |
dc.identifier.articleid | 1347 | |
dc.identifier.contextkey | 14842771 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | ameslab_manuscripts/332 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/7270 | |
dc.language.iso | en | |
dc.relation.ispartofseries | IS-J 9805 | |
dc.source.bitstream | archive/lib.dr.iastate.edu/ameslab_manuscripts/332/IS_J_9805.pdf|||Fri Jan 14 23:38:55 UTC 2022 | |
dc.source.uri | 10.1016/j.mri.2018.09.026 | |
dc.subject.disciplines | Chemistry | |
dc.subject.keywords | magic angle spinning | |
dc.subject.keywords | WHiMS rotor | |
dc.subject.keywords | operando and in situ study | |
dc.subject.keywords | high temperature/pressure | |
dc.subject.keywords | geochemistry | |
dc.subject.keywords | catalysis | |
dc.title | High temperature/pressure MAS-NMR for the study of dynamic processes in mixed phase systems | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
relation.isOrgUnitOfPublication | 25913818-6714-4be5-89a6-f70c8facdf7e |
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