| Download | - View accepted manuscript: In situ laboratory X-ray powder diffraction study of wollastonite carbonation using a high-pressure stage (PDF, 1.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.apgeochem.2009.04.030 |
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| Author | Search for: Whitfield, Pamela S.1; Search for: Mitchell, Lyndon D.2 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Chemical Process and Environmental Technology
- National Research Council of Canada. NRC Institute for Research in Construction
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| Format | Text, Article |
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| Subject | Concrete |
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| Abstract | A 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. |
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| Publication date | 2009-09-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 51394
NRC-IRC-20495 |
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| NPARC number | 20374206 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | df2303b9-590f-4457-bbf1-b9b576cdec48 |
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| Record created | 2012-07-23 |
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| Record modified | 2020-04-16 |
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