Evolution of chromium, manganese and iron oxidation state during conversion of nuclear waste melter feed to molten glass

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F20%3A00532743" target="_blank" >RIV/67985891:_____/20:00532743 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/20:43921262
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0022309319307306?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0022309319307306?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2019.119860" target="_blank" >10.1016/j.jnoncrysol.2019.119860</a>

Result language
angličtina
Original language name
Evolution of chromium, manganese and iron oxidation state during conversion of nuclear waste melter feed to molten glass
Original language description
Oxidation state and chemical conversion of three surrogate nuclear high-level waste melter feeds heat treated to temperatures between 500 and 1200 degrees C were studied using X-ray near-edge structure, feed expansion tests, X-ray diffraction, and evolved gas analyses. For the high-chromium feed (3.00 mass% Cr2O3 in glass), the average Cr oxidation state was predominately Cr3+ at the lowest and highest heat-treatment temperatures and Cr6+ at intermediate temperatures while the Fe coordination shifted from octahedral to non-centrosymmetric tetrahedral at higher temperatures with Fe oxidation state unchanged. For the high-manganese-high-iron feed (3.23 mass% MnO and 16.01 mass% Fe2O3 in glass), the average Mn oxidation state decreased from 4 to similar to 2 while the Fe oxidation state shifted towards increasing ferrous content and changed from five-fold coordination to tetrahedral. For the high-alumina feed (24.02 mass% Al2O3 in glass), average Fe coordination did not change, but Fe oxidation state shifted towards higher ferrous content with increasing temperature.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/LTAUSA18075" target="_blank" >LTAUSA18075: ANALYSIS OF FOAMING – CRITICAL BATCH-TO-GLASS CONVERSION PROCESS</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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