A crucible salt saturation method for determining sulfur solubility in glass melt

Jin, Tongan; Kim, Dongsang; Darnell, Lori P.; Weese, Brigitte L.; Canfield, Nathan L.; Bliss, Mary; Schweiger, Michael J.; Vienna, John D.; Kruger, Albert A.

doi:10.1111/ijag.12366

A crucible salt saturation method for determining sulfur solubility in glass melt

Journal Article · Thu Jun 28 04:00:00 EDT 2018 · International Journal of Applied Glass Science

DOI:https://doi.org/10.1111/ijag.12366· OSTI ID:1457593

^[1]; Kim, Dongsang ^[1]; Darnell, Lori P. ^[1]; Weese, Brigitte L. ^[1]; Canfield, Nathan L. ^[1]; Bliss, Mary ^[1]; Schweiger, Michael J. ^[1]; Vienna, John D. ^[1]; Kruger, Albert A. ^[2]

Pacific Northwest National Laboratory Richland Washington
U.S. Department of Energy, Office of River Protection Richland Washington

Abstract

Experiments were conducted to determine sulfur solubility in Hanford low‐activity waste ( LAW ) glass melts by a sulfur saturation method. Sulfur‐incorporated glass melts were prepared by salt saturation and bubbling methods. The salt saturation method was performed by mixing crushed premelted baseline glasses with an excess amount of Na ₂ SO ₄ prior to melting the mixture at 1150°C for 1 hour. The bubbling method involved bubbling the glass melt at 1150°C in a Pt crucible with an SO ₂ /O ₂ /N ₂ gas mix to equilibrate the melt at a known pressure of SO ₃ . Preliminary results suggested that performing 1 cycle of mixing and melting was not sufficient to saturate the glass. The bubbling method successfully incorporated sulfur into the glass but caused significant losses of sodium from the melt. In order to saturate the glass melt with sulfate without causing noticeable sodium loss, a modified crucible salt saturation method was developed by repeating the mixing and melting of the glass and salt mixture. For all 3 representative LAW glasses tested in this study, it was found that after 3 mixing and melting cycles, the sulfur concentration reaches a plateau, indicating reasonable sulfur saturation.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1457593

Alternate ID(s):: OSTI ID: 1489230

Journal Information:: International Journal of Applied Glass Science, Journal Name: International Journal of Applied Glass Science Journal Issue: 1 Vol. 10; ISSN 2041-1286

Publisher:: Wiley-BlackwellCopyright Statement

Country of Publication:: United States

Language:: English

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