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- W2022273347 abstract "Fourier transform photoacoustic and diffuse reflectance spectroscopies (FT-IR-PAS and -DRS) have been used in situ to monitor the reaction of SO 2 (1.5% in N 2 ) with particulate CaCO 3 at temperatures up to 400°C (PAS) and 690°C (DRS). The PA spectra indicate that at 360°C SO 2 is physisorbed on the CaCO 3 surface. This species is readily desorbed by N 2 purging. Under continuous SO 2 /N 2 exposure at 400°C and above, the physisorbed species is shown by the DR data to be converted first to oxygen-bound and then to nonspecifically bound pyramidal SO 3 − . Reaction of the SO 3 = with SO 2 to form SO 4 − begins at 400°C and is essentially complete at 690°C. The DR data further indicate that for the SO 4 − : (1) at temperatures between 400 and 640°C a monodentate C 3 v species forms; (2) above 640°C the SO 4 − ion has nearly T d symmetry; and (3) upon subsequent cooling, the SO 4 − exhibits the characteristics of a chelating C 2 v species." @default.
- W2022273347 created "2016-06-24" @default.
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- W2022273347 date "1988-08-01" @default.
- W2022273347 modified "2023-09-27" @default.
- W2022273347 title "<i>In Situ</i> Fourier Transform Infrared Diffuse Reflectance and Photoacoustic Spectroscopy Characterization of Sulfur-Oxygen Species Resulting from the Reaction of SO<sub>2</sub> with CaCO<sub>3</sub>" @default.
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- W2022273347 doi "https://doi.org/10.1366/0003702884430155" @default.
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