Document Detail

X-ray studies of carbon dioxide intercalation in Na-fluorohectorite clay at near-ambient conditions.
MedLine Citation:
PMID:  22221040     Owner:  NLM     Status:  Publisher    
We show experimentally that gaseous CO<sub>2</sub> 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 CO<sub>2</sub> is intercalated is found to be 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 H<sub>2</sub>O, 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 CO<sub>2</sub> 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.
Henrik Hemmen; Erlend Granbo Rolseth; Davi de Miranda Fonseca; Elisabeth Lindbo Hansen; Jon Otto Fossum; Tomás S Plivelic
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-5
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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