Investigation of the graphite-H2SO4-gaseous oxidizer (Cl-2, O-3, SO3) systemстатья

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[1] Investigation of the graphite-h2so4-gaseous oxidizer (cl-2, o-3, so3) system / V. V. Avdeev, I. U. Martynov, I. V. Nikolskaya et al. // Journal of Physics and Chemistry of Solids. — 1996. — Vol. 57, no. 6-8. — P. 837–840. The intercalation of H2SO4 into graphite during chemical oxidiation by gaseous oxidizers (Cl-2, O-3, SO3) was investigated by X-ray and potentiometric methods. It is shown that stage 2 (oxidizer, Cl-2) and stage 1 (oxidizer, O-3) are formed in 94% H2SO4. It was established that the rate of the stage 2 GHS formation depends on the Cl-2 ultraviolet radiation, high pressure Cl-2 (P = 40-70 atm) and temperature. As expected the rate of the stage 1 GHS formation (oxidizer, O-3) was increased with content of O-3 in a O-3-O-2 gaseous mixture. The graphite-oleum system was investigated in a wide range of oleum concentrations (5-57% of free SO3) by potentiometric and calorimetric methods. It was established that the potentials of GIC formation with oleum are different from potentials of GHS formation when salt-like, Cl-2 or O-3 are used as oxidizers. In addition, the heat how curves have a monotonous behaviour. These factors were explained by the co-intercalation of SO3 with anions of sulphuric acid into graphite. [ DOI ]

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