Production of molecular hydrogen formed by the thermal and radiation-thermal transformation of water in the nano-Si+H₂O system

• Дата: 2019
• Автори: Jafarov, J.D., Bashirova, S.M., Eyubov, K.T., Garibov, A.A.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2019
• Назва видання: Вопросы атомной науки и техники
• Теми: Physics of radiation damages and effects in solids
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/194940
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Production of molecular hydrogen formed by the thermal and radiation-thermal transformation of water in the nano-Si+H₂O system / J.D. Jafarov, S.M. Bashirova, K.T. Eyubov, A.A. Garibov // Problems of atomic science and technology. — 2019. — № 2. — С. 55-60. — Бібліогр.: 20 назв. — англ.

It were studied the regularities of the dependence of the yield of molecular hydrogen obtained during the thermal and radiation-thermal transformation of water under the action of gamma quanta (⁶⁰Co, P = 18.17 rad/s) on the nano-Si+H₂O system with particle sizes dSi = 50 nm on the temperature (T = 300, 373, 473, 573, 623, and 673 K) of the total system and on the water vapor density (p = 0.25, 0.5, 1, 3, and 8 mg/cm³) at a constant temperature of T = 673K. In this system, in a reaction medium with a water vapor density p=8 mg/cm³ in the temperature range 300 ≤ T ≤473 K, molecular hydrogen is obtained only by radiation-thermal, and in the temperature range 573 ≤ T ≤ 673 K – by thermal and radiation-thermal methods. In the temperature range 300 ≤ T ≤ 473 K, the activation energy of the radiation-thermal process is 1.07 kJ/mol, and in the temperature range 573 ≤ T ≤ 673 K, the activation energy of the thermal and radiation-thermal processes is 68.6 and 53.83 kJ/mol, respectively. At a temperature of T = 673 K, the yield and the rate of formation of molecular hydrogen obtained in the thermal and radiation-thermal transformation of water vapor in the reaction medium increase in direct proportion to the its density at ρ < 3 mg/cm³, and at ρ ≥ 3 mg/cm³ a sharp decrease in the angle slope is observed.