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@ARTICLE{Gautam:255678,
author = {Gautam, Siddharth and Liu, Tingting and Rother, Gernot and
Jalarvo, Niina and Mamontov, Eugene and Welch, Susan and
Sheets, Julie and Droege, Michael and Cole, David R.},
title = {{D}ynamics of {P}ropane in {N}anoporous {S}ilica {A}erogel:
{A} {Q}uasielastic {N}eutron {S}cattering {S}tudy},
journal = {The journal of physical chemistry / C},
volume = {119},
number = {32},
issn = {1932-7455},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2015-05811},
pages = {18188 - 18195},
year = {2015},
abstract = {Molecular motion of hydrocarbons under confinement exhibits
several peculiarities and has important implications in
industries like gas recovery. A quasielastic neutron
scattering (QENS) study of the dynamics of propane in
nanoporous silica aerogel was carried out to quantify its
molecular mobility. The dynamical properties of propane were
studied as a function of temperature, pressure and presence
of CO2. The effects of pressure, i.e., fluid density and
composition, are found to be more pronounced than the
effects of temperature. At low pressures of propane, many
propane molecules are adsorbed onto the pore surfaces and
are thus immobile. As the pressure of propane loading is
increased, more molecules become available to take part in
the diffusional dynamics and thus enhance the diffusivity.
At low pressure the propane molecules take part in a
continuous diffusion, while at higher pressures, the
diffusion of propane molecules within the aerogel occurs via
the mechanism of jumps. Presence of CO2 enhances the jump
rate of propane molecules, thereby increasing the diffusion
coefficient. This study aims to aid in understanding the
complex processes involved in hydrocarbon migration in
porous quartz-rich rocks and enhanced hydrocarbon recovery.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS-SNS},
ddc = {540},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-SNS-20110128},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000359683800020},
doi = {10.1021/acs.jpcc.5b03444},
url = {https://juser.fz-juelich.de/record/255678},
}