tailieunhanh - Uranium thermochemical cycle used for hydrogen production

The results also indicated that the chemical conversion rate of hydrogen production was in direct proportion to the mass of Na2CO3, while the solid product was Na2UO4, instead of Na2U2O7. Nevertheless the thermochemical cycle used for hydrogen generation can be closed, and chemical compounds used in these processes can also be recycled. So the cycle with Na2UO4 as its first reaction product has an advantage over the proposed UTC process, attributed to the fast reaction rate and high hydrogen yield in the first reaction step. | Nuclear Engineering and Technology 51 2019 214 220 ELSEVIER Contents lists available at ScienceDirect Nuclear Engineering and Technology journal homepage locate net nuclear ENGINEERING AND TECHNOLOGY Original Article Uranium thermochemical cycle used for hydrogen production Aimei Chen Chunxia Liu Yuxia Liu Lan Zhang Check for updates Center for Excellence in TMSR Energy System Shanghai Institute of Applied Physics Chinese Academy of Sciences 2019 Jialuo Highway Shanghai China ARTICLE INFO ABSTRACT Article history Received 25 April 2018 Received in revised form 6 August 2018 Accepted 21 August 2018 Available online 4 September 2018 Thermochemical cycles have been predominantly used for energy transformation from heat to stored chemical free energy in the form of hydrogen. The thermochemical cycle based on uranium UTC proposed by Oak Ridge National Laboratory has been considered as a better alternative compared to other thermochemical cycles mainly due to its safety and high efficiency. UTC process includes three steps in which only the first step is unique. Hydrogen production apparatus with hectogram reactants was designed in this study. The results showed that high yield hydrogen was obtained which was Keywords Thermochemical cycle Hydrogen production Uranium Sodium urinate Energy determined by drainage method. The results also indicated that the chemical conversion rate of hydrogen production was in direct proportion to the mass of Na2CO3 while the solid product was Na2UO4 instead of Na2U2O7. Nevertheless the thermochemical cycle used for hydrogen generation can be closed and chemical compounds used in these processes can also be recycled. So the cycle with Na2UO4 as its first reaction product has an advantage over the proposed UTC process attributed to the fast reaction rate and high hydrogen yield in the first reaction step. 2018 Korean Nuclear Society Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license