A novel method that spent nuclear fuel is converted into nitrates with N2O4, and then nitrates are extracted with TBP in supercritical CO2 (SC-CO2), has been developed for reprocessing of spent nuclear fuel, which has a potential prospect because of its potential to decrease
generation of the secondary liquid waste. In this paper, conversion of Nd2O3 with N2O4 into its nitrate under various conditions and extraction of the conversion product with TBP in SC-CO2 were investigated. When temperature was 60–120 °C, the molar ratio of H2O to Nd2O3 was from 1 to 6, and molar ratio of N2O4 to Nd2O3 was above 8, complete conversion of Nd2O3 into its nitrate was achieved. The conversion product was characterized by thermal analysis (TG-DTA), X-ray diffraction (XRD),
Fourier transformed infrared spectroscopy (FT-IR) and Raman spectroscopy. Quantitative extraction of the conversion product
with TBP in supercritical CO2 was also achieved under experimental conditions.
Authors:B. Pacewska, M. Nowacka, I. Wilińska, W. Kubissa, and V. Antonovich
England in years 1973–1974) CACs are applied to structural concrete much less often than Portland cements [ 1 – 3 ]. The deterioration of strength is related with a process of conversion of aluminate hydrates. In case of CACs the nature of hydration
disability due to conversion disorder: a prospective control group study. Journal of Neurology, Neurosurgery and Clinical Psychiatry , 63: 83–88.
Binzer, N., Kullgren, G. (1998): Motor conversion disorder. Psychosomatics , 39: 519
biomass-derived materials such as bio-ethanol for the problems of exhaustion of petroleum resources and global warming. Therefore, propylene production from bio-ethanol is highly desirable. Processes for the conversion of methanol to olefins (MTO) are well
Iso-conversional methods are used for non-isothermal analysis, in which the transformation rate at a constant extent of conversion is only a function of temperature as suggested by Vyazovkin et al. [ 1 – 4 ] and
method, which can not detect the complex nature of the solid-state reaction, has been replaced by multiple scan method at different heating rates using iso-conversional and iso-temperature calculation procedures [ 12 – 14 ]. Among the iso-conversional
Authors:S. X. S. Costa, M. R. Galvão, D. P. Jacomassi, M. I. B. Bernardi, A. C. Hernandes, A. N. de Souza Rastelli, and M. F. Andrade
employed, as well as to the composite resin composition and degree of conversion [ 6 ].
Composite resins are set via exposure to light of a certain wavelength and an intensity that initiates the generation of free radicals that propagate