Tritium Sequestration in Gen IV NGNP Gas Stream via Proton Conducting Ceramic Pumps

Chen, Fanglin Frank¹  Adams, Thad M.²  Brinkman, Kyle³ 

[1] Univ. of South Carolina, Columbia, SC (United States);Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL);Savannah River Site (SRS), Aiken, SC (United States).

关键词: ELECTRIC CONDUCTIVITY;    PROTONS;    CARBON DIOXIDE;    TRITIUM;    SOLID SOLUTIONS;    PEROVSKITES;    YTTRIUM OXIDES;    STRONTIUM OXIDES;    CERIUM OXIDES;    BARIUM OXIDES;    TEMPERATURE RANGE 1000-4000 K;    ACTIVATION ENERGY;    CERAMICS;    SINTERING;    MICROSTRUCTURE;    STABILITY;    DOPED MATERIALS;    MEMBRANES;    SEPARATION PROCESSES;    HTGR TYPE REACTORS;    RADIATION HARDNESS;   

DOI  :  10.2172/1047493
RP-ID  :  DOE/NEUP--09-801
PID  :  OSTI ID: 1047493
Others  :  Other: Project 09-510 Report 09-801
Others  :  TRN: US1600166

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来源: SciTech Connect

【 摘 要 】

Several types of high-temperature proton conductors based on SrCeO₃ and BaCeO₃ have been systematically investigated in this project for tritium separation in NGNP applications. One obstacle for the field application is the chemical stability issues in the presence of steam and CO₂ for these proton conductors. Several strategies to overcome such issues have been evaluated, including A site doping and B site co-doping method for perovskite-structured proton conductors. Novel zirconium-free proton conductors have also been developed with improved electrical conductivity and enhanced chemical stability. Novel catalytic materials for the proton-conducting separation membranes have been investigated. A tubular geometry proton-conducting membrane has been developed for the proton separation membranes. Total dose rate estimated from tritium decay (beta emission) under realistic membrane operating conditions, combined with electron irradiation experiments, indicates that proton ceramic materials possess the appropriate radiation stability for this application.