Adsorption kinetics on the recovery of hydrogen isotopes from helium using palladium particle bed. (7th December 2017)

• Record Type: Journal Article
• Authors: Sandeep, K.C.; Shinde, Sarika S.; Mistry, Krunal; Bhanja, Kalyan; Mohan, Sadhana; Mandal, D.; Mahajani, Sanjay
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 49(2017)
• Page Start: 29300
• Page End: 29309
• Publication Date: 2017-12-07
• Subjects: Recovery and separation -- Hydrogen isotopes -- Hydrogen/deuterium adsorption -- Palladium -- Simulation and modeling -- Helium Purge System (HPS); Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.10.023
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The recovery and separation of hydrogen isotopes from helium purge gas is one of the critical steps in nuclear fusion based fuel cycle. In the present study, the adsorption kinetics of hydrogen and deuterium from helium using palladium particle bed is generated at different temperatures varying from 30 °C to 150 °C in a recirculating packed bed batch adsorption system. The system is modeled as a combination of packed bed adsorber and a mixing vessel connected in closed loop. The overall mass transfer coefficient is estimated at different temperatures by minimizing the error between the simulated results and the experimental data. The apparent activation energy is estimated for both the hydrogen isotopes using Arrhenius plot. Based on the estimated values of apparent activation energies, it is concluded that the overall adsorption rate is limited by internal diffusion for both hydrogen and deuterium. Graphical abstract: Highlights: Adsorption kinetics of H2 and D2 from He using palladium is generated. System is modeled as packed bed with complete mixing vessel in closed loop. The overall mass transfer coefficient is estimated at different temperatures (30 °C–150 °C). The apparent activation energy is estimated for both H2 and D2 . Overall adsorption rate is found to be limited by internal diffusion.