In situ laboratory X-ray powder diffraction study of wollastonite carbonation using a high-pressure stage

Download
  1. (PDF, 906 KB)
  2. Get@NRC: In situ laboratory X-ray powder diffraction study of wollastonite carbonation using a high-pressure stage (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.apgeochem.2009.04.030
AuthorSearch for: ; Search for:
TypeArticle
Journal titleApplied Geochemistry
Volume24
Issue9
Pages16351639; # of pages: 5
SubjectConcrete
AbstractA high-pressure gas stage, recently developed for in-situ X-ray powder diffraction studies of polymer crystallization under CO2, has been used to observe the carbonation of wollastonite under various temperature/pressure conditions despite the fact that the stage was not designed for use with moisture-containing samples. The rate of carbonation of wollastonite at 60 ºC was found to be pressure-independent. Additional experiments at 34.5 bar between 43 and 73 ºC enabled an activation energy of 53 kJ mol-1 to be determined for the rate-limiting step. This value agrees very well with a published value for the leaching of Ca from wollastonite in acidic conditions and suggests that Ca leaching is the rate-limiting step in wollastonite carbonation at these temperatures.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Chemical Process and Environmental Technology; NRC Institute for Research in Construction
Peer reviewedYes
NRC number51394
20495
NPARC number20374206
Export citationExport as RIS
Report a correctionReport a correction
Record identifierdf2303b9-590f-4457-bbf1-b9b576cdec48
Record created2012-07-23
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)