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X-ray Studies of Carbon Dioxide Intercalation in Na-Fluorohectorite Clay at Near-Ambient Conditions

Hemmen, Henrik; Rolseth, Erlend; Fonseca, Davi; Hansen, Elisabeth; Fossum, Jon Otto and Plivelic, Tomás LU (2012) In Langmuir 28(3). p.1678-1682
Abstract (Swedish)
Abstract in Undetermined

We show experimentally that gaseous CO2 intercalates into the interlayer space of the synthetic smectite clay Na-fluorohectorite at conditions not

too far from ambient. The mean interlayer repetition distance of the clay when CO2 is intercalated is found to be 12.5 Å for the conditions −20 °C and 15 bar. The magnitude of the expansion of the interlayer upon intercalation is indistinguishable from that observed in the dehydrated−monohydrated transition for H2O, but the possibility of water intercalation is ruled out by a careful analysis of the experimental conditions and repeating the measurements exposing the clay to nitrogen gas. The dynamics of the process is observed to be dependent on... (More)
Abstract in Undetermined

We show experimentally that gaseous CO2 intercalates into the interlayer space of the synthetic smectite clay Na-fluorohectorite at conditions not

too far from ambient. The mean interlayer repetition distance of the clay when CO2 is intercalated is found to be 12.5 Å for the conditions −20 °C and 15 bar. The magnitude of the expansion of the interlayer upon intercalation is indistinguishable from that observed in the dehydrated−monohydrated transition for H2O, but the possibility of water intercalation is ruled out by a careful analysis of the experimental conditions and repeating the measurements exposing the clay to nitrogen gas. The dynamics of the process is observed to be dependent on the pressure, with a higher intercalation rate at increased pressure. The rate of CO2 intercalation at the studied conditions is found to be several orders of magnitude slower than the intercalation rate of water or humidity at ambient pressure and temperature. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
28
issue
3
pages
1678 - 1682
publisher
The American Chemical Society
external identifiers
  • wos:000299366500004
  • scopus:84856182820
ISSN
0743-7463
DOI
10.1021/la204164q
language
English
LU publication?
yes
id
b7bae8f8-bf64-425a-a6da-261e1360e01f (old id 2301811)
date added to LUP
2012-01-25 07:37:34
date last changed
2017-09-24 03:11:36
@article{b7bae8f8-bf64-425a-a6da-261e1360e01f,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
We show experimentally that gaseous CO2 intercalates into the interlayer space of the synthetic smectite clay Na-fluorohectorite at conditions not<br/><br>
too far from ambient. The mean interlayer repetition distance of the clay when CO2 is intercalated is found to be 12.5 Å for the conditions −20 °C and 15 bar. The magnitude of the expansion of the interlayer upon intercalation is indistinguishable from that observed in the dehydrated−monohydrated transition for H2O, but the possibility of water intercalation is ruled out by a careful analysis of the experimental conditions and repeating the measurements exposing the clay to nitrogen gas. The dynamics of the process is observed to be dependent on the pressure, with a higher intercalation rate at increased pressure. The rate of CO2 intercalation at the studied conditions is found to be several orders of magnitude slower than the intercalation rate of water or humidity at ambient pressure and temperature.},
  author       = {Hemmen, Henrik and Rolseth, Erlend and Fonseca, Davi and Hansen, Elisabeth and Fossum, Jon Otto and Plivelic, Tomás},
  issn         = {0743-7463},
  language     = {eng},
  number       = {3},
  pages        = {1678--1682},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {X-ray Studies of Carbon Dioxide Intercalation in Na-Fluorohectorite Clay at Near-Ambient Conditions},
  url          = {http://dx.doi.org/10.1021/la204164q},
  volume       = {28},
  year         = {2012},
}