V. V. Lunin

High-temperature electron irradiation and radiation-thermal technology for utilization, purification and production of some metals

Abstract High-temperature irradiation by the beam of 1.2–1.6 MeV accelerated electrons has been used for production Pt, Pd, Mo, Co, Cu and Ni from desactivated Pt(Pd)-containing reforming catalysts, molybdenum sulfide hydrodesulphurization catalysts and hydrogenation catalyst waste material. The radiation-induced decomposition of supported Ni(Co)-Mo/Al 2 O 3 sulfide catalyst and organic fragments of hydrogenation catalyst wastes has been studied. Radiolysis product distributions are shown as function of time (time up to 1, 0 h) and temperature (570–1400K). There was made a principle scheme of the first technological unit for radiation-thermal utilization, purification and production of some metals from solid wastes material.

Thermal irradiation of deactivated heterogeneous catalysts

Radiation heating decreases 10–100 — fold the regeneration time of deactivated catalysts, accelerates the removal of carbon and sulfur, affects on phase composition, pore structure and mechanical properties of catalysts and sorbents.

Radiation-thermal oxide adsorbents processing from carbon and sulphur compounds

Abstract In the given paper the authors present the adsorbents processing methods from carbon- and sulphurcontaining compounds. Physical-chemical investigations of phase changes in the carriers structures were performed. Temperature and dose irradiation intervals were determined that adsorbents bulk structure was constant. The adsorbents total specific surface by low-temperature crypton adsorption confirmed its total conservation. By chemical elements analysis, IR- and UV-spectroscopy it was demonstrated that S and C residual quantity does not exceed 0, 034 and 0, 01 mass p.c. respectively.