Photochemical deuterium separation: problems and prospects

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Photochemical separation of deuterium is examined to determine if either an ultraviolet or an infrared laser-based technology offers greater promise for development into an industrially viable heavy water production process. The three systems to be discussed are multiple-photon dissociation of organic molecules by pulsed CO/sub 2/ laser; CO or CO/sub 2/ laser-induced bimolecular reactions; and single-photon induced molecular dissociation by ultraviolet laser. Multiple-photon dissociation by CO/sub 2/ laser is attractive, since it utilizes an already developed high-power and efficient laser technology. Furthermore, single-step deuterium enrichment factors exceeding 1000-fold have been observed in the CF/sub 2/ = CFD photo-product from multiple-photon ... continued below

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Pages: 18

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Marling, J.B. & Herman, I.P. September 1, 1978.

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Description

Photochemical separation of deuterium is examined to determine if either an ultraviolet or an infrared laser-based technology offers greater promise for development into an industrially viable heavy water production process. The three systems to be discussed are multiple-photon dissociation of organic molecules by pulsed CO/sub 2/ laser; CO or CO/sub 2/ laser-induced bimolecular reactions; and single-photon induced molecular dissociation by ultraviolet laser. Multiple-photon dissociation by CO/sub 2/ laser is attractive, since it utilizes an already developed high-power and efficient laser technology. Furthermore, single-step deuterium enrichment factors exceeding 1000-fold have been observed in the CF/sub 2/ = CFD photo-product from multiple-photon dissociation of dichlorotrifluoroethane, satisfying the high isotopic selectivity for economically viable photochemical deuterium separation. Its major drawback at present is the need to operate at low pressure. IR laser-induced bimolecular reactions may permit operation at higher pressure, and attractive processes include the methane + halogen and acetylene + hydrogen halide reaction systems. Single-photon induced ultraviolet dissociation using formaldehyde permits relatively high pressure operation, high single-step deuterium enrichment factors, and near-unity quantum yield. However, uv laser average power, efficiency, and lifetime, even based on the new XeCl or KrF excimer systems, still need substantial development to be used in an industrially viable process.

Physical Description

Pages: 18

Notes

Dep. NTIS, PC A02/MF A01.

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  • 10. electro optics laser conference, Boston, MA, USA, 19 Sep 1978

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  • Report No.: UCRL-81087
  • Report No.: CONF-780958-4
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 6440728
  • Archival Resource Key: ark:/67531/metadc1212854

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 1, 1978

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 17, 2018, 12:44 p.m.

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Marling, J.B. & Herman, I.P. Photochemical deuterium separation: problems and prospects, article, September 1, 1978; United States. (digital.library.unt.edu/ark:/67531/metadc1212854/: accessed January 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.