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in creator/contributor: "Kapoor, S."  
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On the generation of H{sub 2} from formaldehyde in basic aqueous solutions

Description: The generation of H{sub 2} from formaldehyde and glyoxalate in aqueous solutions at high concentrations of hydroxide has been studied in the temperature range 21-60{degrees}C. The reaction is first order in formaldehyde and is of higher than first order in hydroxide concentration. Conversion ratio of the aldehyde to H{sub 2} increases on increasing OH{sup {minus}} concentration and on raising the temperature. It decreases on increasing aldehyde concentration due to the competition by the Canniz… more
Date: March 1, 1994
Creator: Kapoor, S.; Barnabas, F.; Jonah, C. D.; Sauer, M. C. Jr. & Meisel, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gas generation from Hanford grout samples. Final report

Description: The radiolytic yields of H{sub 2}, N{sub 2}, O{sub 2}, N{sub 2}O, and CO from two batches of WHC-supplied samples of grouted simulated waste have been {gamma} irradiated at several dose rates (0.025, 0.63 and 130 krad/h for H{sub 2} and 130 krad/h for all other gases). In one batch, the liquid waste simulant that was added to the grout included the original components that were added to Tank 102-AP (labeled ``virgin``waste.) The second batch included a similar liquid waste simulant that was pre… more
Date: March 1, 1994
Creator: Jonah, C. D.; Kapoor, S.: Matheson, M. S.; Mulac, W. A. & Meisel, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reduction and aggregation of silver in aqueous gelatin and silica suspensions

Description: The investigation of silver reduction and aggregation processes are of specific interest to the photographic industry, which relies heavily on photochemical equivalents of these reactions. Mechanistic insights into the formation of small silver clusters in aqueous solution have been obtained from both pulse and {gamma}-radiolytic studies. This paper examines the reduction of silver ions and the subsequent formation of silver clusters in aqueous gelatin solutions and on colloidal silica particle… more
Date: June 1, 1994
Creator: Kapoor, S.; Lawless, D.; Kennepohl, P.; Meisel, D. & Serpone, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiolytic and thermal generation of gases from Hanford grout samples

Description: Gamma irradiation of WHC-supplied samples of grouted Tank 102-AP simulated nonradioactive waste has been carried out at three dose rates, 0.25, 0.63, and 130 krad/hr. The low dose rate corresponds to that in the actual grout vaults; with the high dose rate, doses equivalent to more than 40 years in the grout vault were achieved. An average G(H{sub 2}) = 0.047 molecules/100 eV was found, independent of dose rate. The rate of H2 production decreases above 80 Mrad. For other gases, G(N{sub 2}) = 0… more
Date: October 1, 1993
Creator: Meisel, D.; Jonah, C. D.; Kapoor, S.; Matheson, M. S. & Mulac, W. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiolytic and radiolytically induced generation of gases from synthetic wastes. Final report

Description: To better understand the processes leading to the generation and release of gases from waste tanks, the authors studied the radiolytic and thermal generation of H{sub 2}, N{sub 2}O, N{sub 2}, O{sub 2}, and NH{sub 3} in nonradioactive waste simulant solutions and slurries. The radiolytic sources for H{sub 2} are e{sub aq}{sup {minus}} and its predecessors and H atoms. Radiolysis of the water generates some H{sub 2} and an additional amount comes from the hydrogen abstraction reaction H + RH{yiel… more
Date: October 1, 1993
Creator: Meisel, D.; Jonah, C. D.; Kapoor, S.; Matheson, M. S. & Sauer, M. C. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The origin of hydrogen generated from formaldehyde in basic solutions

Description: The isotopic composition of dihydrogen generated from formaldehyde in highly basic solutions has been investigated. It is shown that two pathways contribute to the generation of dihydrogen. In the first pathway, one hydrogen atom originates from water and the other from formaldehyde. In the second pathway both hydrogen atoms originate from the methylene moiety of the formaldehyde. For production of dihydrogen from glyoxylate only the first pathway is observed.
Date: March 1, 1996
Creator: Kapoor, S.; Barnabas, F.; Jonah, C. D.; Sauer, M. C. Jr. & Meisel, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gas generation from Hanford grout samples

Description: In an extension of our work on the radiolytic processes that occur in the waste tanks at the Hanford site, we studied the gas generation from grout samples that contained nuclear waste simulants. Grout is one option for the long-term storage of low-level nuclear waste solutions but the radiolytic effects on grout have not been thoroughly defined. In particular, the generation of potentially flammable and hazardous gases required quantification. A research team at Argonne examined this issue and… more
Date: March 1, 1996
Creator: Jonah, C. D.; Kapoor, S.; Matheson, M. S.; Mulac, W. A. & Meisel, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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