Evaluation of Getter Metals in Na–Al–Si–O Aerogels and Xerogels for the Capture of Iodine Gas
Source abstract
Abstract
In this paper, sodium aluminosilicate aerogels and xerogels were evaluated as scaffolds for a variety of different getters including Ag+, Cs+, Cu2+, Fe3+, K+, Li+, Rb+, Sb3+, Sn2+, and Sn4+ for the capture of gaseous iodine coming from nuclear facilities. The exchange capacities varied widely from a near complete exchange in the case of Ag+ to much lower exchange levels for some of the Sn compounds [i.e., colloidal SnO2, Sn(II) acetate, and Sn(IV) acetate]. Several of the additives showed great promise at allowing for high iodine loadings in the base materials including the following: AgNO3, colloidal SnO2, Sn(II) acetate, Sn(IV) acetate, Cu(NO3)2, and CuSO4. From the standpoint of iodine uptake as a function of getter loading, Sn4+ was the most promising with a getter utilization (mass of iodine divided by mass of Sn, in atomic %) of 8.4, a chemical uptake of 60.7 mass % (oxygen excluded), and an mI ms–1 (mass of iodine per mass of sorbent) value of 0.881; these are some of the highest values reported to date for inorganic iodine sorbents.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Covalent Organic Framework Applications · Methane Hydrates and Related Phenomena · Radioactive element chemistry and processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Pacific Northwest National Laboratory, Richland, Washington 99354, United States
Funding
Office of Nuclear Energy
References (42)
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