Physics

Isotope

Organic chemistry

Work (physics)

Divinylbenzene

Hydrogen

Deuterium

Tritium

Engineering

Catalysis

Radiochemistry

Copolymer

Composite material

Isotope separation

Nuclear physics

Chemistry

Materials science

Heavy water

Styrene

Hydrogen isotope

Chemical engineering

Polymer

Thermodynamics

Fusion Science & Technology

In this work, experimental and mathematical substantiation of the possibility of using the new RCTU-4 hydrophobic catalyst [0.9 mass % Pt/styrene and divinylbenzene (SDVB)] in the separation of protium-tritium isotopic mixtures by a two-temperature catalytic exchange method in a water-hydrogen system was carried out. Variation of the synthesis parameters of the support and the catalyst allowed a significant increase in the activity (≥50 s–1) and heat resistance (≈550 K) of the investigated sample compared to the previously used catalyst RCTU-3SM (kexp = 12 s−1; heat resistance = 388 K). The mathematical model presented in the paper considers three phases (liquid water, steam, and hydrogen gas) and allows optimization of dual-temperature installations in the water-hydrogen system for any isotopic mixtures.

Development of Technology for Liquid Radioactive Waste Detritiation by Two-Temperature Catalytic Isotope Exchange Method in a Water-Hydrogen System