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Development of a practical photochemical energy storage system. Quarterly report. [Interconversion between norbornadiene and quadricyclene for thermochemical heat storage]

Description: Research on polymer organic sensitizers and polymer inorganic sensitizers for the conversion of norbornadiene to quadricyclene for thermochemical storage of solar heat is described. Also, research on the catalysis of the conversion of quadricyclane to norbornadiene is described. Polymer-anchored cobalt(II) porphyrin catalysts, polymer-anchored palladium(II) phosphine catalysts, and triphenylcyclopropenyl nickel complexes as catalysts were studied, and results are discussed. (WHK)
Date: March 15, 1977
Creator: Hautala, R. R. & Kutal, C. R.
Partner: UNT Libraries Government Documents Department

Isotopic HCl transfer laser

Description: An HCl laser which uses isotopic V-V energy transfer collisions as a pumping mechanism has been demonstrated. This multiline laser, which utilized an intracavity cold gas isotope filter, increased the energy from the P/sub 1/ lines of H/sup 37/Cl while decreasng the energies of the P/sub 1/ and P/sub 2/ lines of H/sup 35/Cl. Previously unreported lines, including emission from R branch transitions, have also been observed from single-line HCl and HBr lasers.
Date: December 15, 1977
Creator: Badcock, C.C.; Hwang, W.C.; Kalsch, J.F. & Kamada, R.F.
Partner: UNT Libraries Government Documents Department

Filament power regulator for thermal ionization mass spectrometry

Description: A device has been developed that will control the filament temperature in a thermal ionization mass spectrometer. The arrangement is superior to past methods to control this critical parameter. The operating principle lies in the feature of filament power control as contrasted with the formerly used voltage or current controls. Reproducibility and stability of ion beams showed great improvement. The mass spectrometer was developed to analyze for parts-per-billion concentrations of uranium in water samples.
Date: September 15, 1977
Creator: Rogers, E. R. & Ferguson, J. R.
Partner: UNT Libraries Government Documents Department

Geothermal commercial power plant study. Monthly progress report, January 29, 1977-February 25, 1977

Description: Conceptual designs and capital cost estimates were completed for the six different Heber power plants in this study. The six plants involve two types of operating modes, constant geothermal fluid flow rate and constant power output, each for net capacities of 50, 100, and 200 MWe. Conceptual designs were completed for the six plants by modifying and scaling-up the base case design. The capital costs for all six plants were estimated in fourth-quarter 1976 dollars.
Date: April 15, 1977
Partner: UNT Libraries Government Documents Department

In-situ drying process test proposal

Description: To determine if in-situ drying is a practical method of removing the nonrecoverable interstitial liquid, a process test is needed. By reducing the tank ventilation rate, the salt cake or sludge will increase in temperature and more moisture can be evaporated. As long as the air flow rate is great enough to replace the moisture laden air with ambient air, the moisture removal rate (MRR) should increase. The maximum MRR will be determined by reducing the flow rate in a stepwise procedure. Tanks 105-BY, 107-BY, and 110-U have been chosen for use in these tests. Temperature increases resulting from the process tests will not exceed the maximum tank temperature limits.
Date: July 15, 1977
Creator: Dixon, D. R.
Partner: UNT Libraries Government Documents Department

Development of a practical photochemical energy storage system. Quarterly report

Description: The emphasis of work during this past quarter has been on improvement of the performance of immobilized photosensitizers. Prolonged use of Polymer N in the recycling prototype has resulted in gradual deterioration of the behavior of this photosensitizer. Furthermore the opacity of the beads results in an inherent 20% loss in efficiency apparently through light reflection. In an attempt to improve the characteristics with respect to these points considerable effort was devoted in the synthetic grafting of sensitizer chromophores to glass surfaces. Some success has already been achieved, and the first successful silica-grafted photosensitizer is reported. Experience with the polystyrene grafted sensitizers, such as polymer N, has shown that details concerning the synthetic pathway (such as percent loading, types of site-site interactions, particle size and synthetic sequence) markedly influence the performance. Clearly, enhanced characteristics can be expected with systematic refinements. Preliminary results on both organic and inorganic systems are described.
Date: March 15, 1977
Creator: Hautala, R.R. & Kutal, C.R.
Partner: UNT Libraries Government Documents Department

Development of a practical photochemical energy storage system. Quarterly report, July 1, 1977--September 30, 1977

Description: During this quarter the portion of this project concerned with catalysis has concentrated on the development of increased understanding of the cobalt(II) porphyrin catalyst. Of potential importance is the observation that the activity of partially deactivated catalysts can be partially restored by treatment with titanium(III) solutions thereby suggesting that a major cause of the losses of activity of catalysts upon repeated recycling arises from oxidation of cobalt(II) to cobalt(III). The previously discovered molybdenum catalyst ((CF/sub 3/)/sub 2/C/sub 2/S/sub 2/)/sub 3/Mo and the closely related nickel catalyst ((CF/sub 3/)/sub 2/C/sub 2/S/sub 2/)/sub 2/Ni were also studied in detail.
Date: September 15, 1977
Creator: Hautala, R.R. & Kutal, C.R.
Partner: UNT Libraries Government Documents Department

Development of a practical photochemical energy storage system. Annual report, June 15, 1976--June 14, 1977. [Interconversion between norbornadiene and quadricyclene for thermochemical heat storage]

Description: Significant progress toward the development of a solar energy storage system based on the norbornadiene-quadricyclene interconversion has been achieved during the past year. New sensitizers and catalysts have been discovered and conditions found where single cycles of the photosensitization step and the catalytic reversion step appear to be quantitative. Both sensitizers and catalysts have been successfully incorporated onto insoluble polymeric supports. The long term stability of these components is currently being tested using a recently constructed prototype device designed for multiple recycling experiments. Investigations are also underway on design modifications which will allow incorporation of the norbornadiene-quadricyclene system into currently available state-of-the-art solar collectors.
Date: March 15, 1977
Creator: Hautala, R.R. & Kutal, C.R.
Partner: UNT Libraries Government Documents Department