Boron nitride: Novel ceramic reductant for low-activity waste vitrification

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F25%3A00618525" target="_blank" >RIV/67985891:_____/25:00618525 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43933310

Výsledek na webu

<a href="https://doi.org/10.1111/jace.20192" target="_blank" >https://doi.org/10.1111/jace.20192</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jace.20192" target="_blank" >10.1111/jace.20192</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Boron nitride: Novel ceramic reductant for low-activity waste vitrification

Popis výsledku v původním jazyce

During vitrification of radioactive wastes, excessive foaming reduces processing rates within melters by hindering heat transfer from the molten glass pool to the reacting melter feed. Formulations of low-activity waste (LAW) melter feeds, for vitrification at the Waste Treatment and Immobilization Plant at the Hanford Site, conventionally include the addition of sucrose to mitigate excessive foaming by hastening the denitration process. However, incomplete combustion of sucrose produces organics such as acetonitrile (C2H3N) that may exceed bounding limits of downstream effluent treatment facilities. Using boron nitride (BN) as an alternate reductant to sucrose, in a representative LAW melter feed reduced C2H3N production by 90% by preventing the low-temperature sucrose-nitrate reactions. Furthermore, foaming was suppressed due to the higher decomposition temperature of BN than H3BO3 meaning a delayed reaction of a large fraction of boron with the transient glass-forming melt until above the foam onset temperature, thus reducing the quantity and viscosity of the connected melt and trapping less gas in the foam layer.

Název v anglickém jazyce

Boron nitride: Novel ceramic reductant for low-activity waste vitrification

Popis výsledku anglicky

During vitrification of radioactive wastes, excessive foaming reduces processing rates within melters by hindering heat transfer from the molten glass pool to the reacting melter feed. Formulations of low-activity waste (LAW) melter feeds, for vitrification at the Waste Treatment and Immobilization Plant at the Hanford Site, conventionally include the addition of sucrose to mitigate excessive foaming by hastening the denitration process. However, incomplete combustion of sucrose produces organics such as acetonitrile (C2H3N) that may exceed bounding limits of downstream effluent treatment facilities. Using boron nitride (BN) as an alternate reductant to sucrose, in a representative LAW melter feed reduced C2H3N production by 90% by preventing the low-temperature sucrose-nitrate reactions. Furthermore, foaming was suppressed due to the higher decomposition temperature of BN than H3BO3 meaning a delayed reaction of a large fraction of boron with the transient glass-forming melt until above the foam onset temperature, thus reducing the quantity and viscosity of the connected melt and trapping less gas in the foam layer.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/LUAUS23062" target="_blank" >LUAUS23062: Experimentální a matematická analýza vlastností primární sklotvorné taveniny, vývoje plynů, a jejich vztahu k množství vyvinuté primární pěny.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of the American Ceramic Society

ISSN

0002-7820

e-ISSN

1551-2916

Svazek periodika

108

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

e20192

Kód UT WoS článku

001343731200001

EID výsledku v databázi Scopus

2-s2.0-85207325990