Deuterium Isotope Effects on Acid Ionization and Transition Metal Hydrolysis at Reactor Conditions by Raman Spectroscopy
32nd Annual CNS Conference - 2011 June 05-08

Presented at:
32nd Annual CNS Conference
2011 June 05-08
Niagara Falls, Canada
Session Title:
Process Systems, Measurement, I & C, and Chemistry

Michael Yacyshyn (University of Guelph)
Melerin Madekufamba (University of Guelph)
Peter Tremaine (University of Guelph)


This paper reports the preliminary measurements from an experimental study to measure the small differences between light (H2O) and heavy (D2O) water under reactor operating conditions (250-300 oC, 10 MPa), using Raman spectroscopy. The deuterium isotope effect 

DpK = pKD2O pKH2O, for sodium bisulphate NaDSO4 and phosphoric acid D3PO4, has now been determined at temperatures of 25 oC and 80 oC by measuring the isotropic Raman spectra at different concentrations. The results for the pK and ΔpK at 25 oC agree with the literature, confirming the reliability of the method.  High temperature cells have been constructed. 

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