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Title: Conversion of nuclear waste to molten glass: Formation of porous amorphous alumina in a high-Al melter feed

Abstract

The transition of Al phases in a simulated high-Al high-level nuclear waste melter feed heated at 5 K min-1 to 700°C was investigated with transmission electron microscopy, 27Al nuclear magnetic resonance spectroscopy, the Brunauer-Emmett-Teller method, and X-ray diffraction. At temperatures between 300 and 500°C, porous amorphous alumina formed from the dehydration of gibbsite, resulting in increased specific surface area of the feed (~8 m2 g-1). The high-surface-area amorphous alumina formed in this manner could potentially stop salt migration in the cold cap during nuclear waste vitrification.

Authors:
ORCiD logo; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1340744
Report Number(s):
PNNL-SA-118421
Journal ID: ISSN 0022-3115; 39392; 830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials; Journal Volume: 483; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
Nuclear waste vitrification; amorphous alumina; high-Al HLW; Environmental Molecular Sciences Laboratory

Citation Formats

Xu, Kai, Hrma, Pavel, Washton, Nancy, Schweiger, Michael J., and Kruger, Albert A. Conversion of nuclear waste to molten glass: Formation of porous amorphous alumina in a high-Al melter feed. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2016.11.005.
Xu, Kai, Hrma, Pavel, Washton, Nancy, Schweiger, Michael J., & Kruger, Albert A. Conversion of nuclear waste to molten glass: Formation of porous amorphous alumina in a high-Al melter feed. United States. doi:10.1016/j.jnucmat.2016.11.005.
Xu, Kai, Hrma, Pavel, Washton, Nancy, Schweiger, Michael J., and Kruger, Albert A. Sun . "Conversion of nuclear waste to molten glass: Formation of porous amorphous alumina in a high-Al melter feed". United States. doi:10.1016/j.jnucmat.2016.11.005.
@article{osti_1340744,
title = {Conversion of nuclear waste to molten glass: Formation of porous amorphous alumina in a high-Al melter feed},
author = {Xu, Kai and Hrma, Pavel and Washton, Nancy and Schweiger, Michael J. and Kruger, Albert A.},
abstractNote = {The transition of Al phases in a simulated high-Al high-level nuclear waste melter feed heated at 5 K min-1 to 700°C was investigated with transmission electron microscopy, 27Al nuclear magnetic resonance spectroscopy, the Brunauer-Emmett-Teller method, and X-ray diffraction. At temperatures between 300 and 500°C, porous amorphous alumina formed from the dehydration of gibbsite, resulting in increased specific surface area of the feed (~8 m2 g-1). The high-surface-area amorphous alumina formed in this manner could potentially stop salt migration in the cold cap during nuclear waste vitrification.},
doi = {10.1016/j.jnucmat.2016.11.005},
journal = {Journal of Nuclear Materials},
number = C,
volume = 483,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}