A DEVELOPMENT OF ON-LINE TEMPERATURE MEASUREMENT INSTRUMENTATION FOR GASIFICATION PROCESS CONTROL

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Description

This progress report covers continuing work to develop a temperature probe for a coal gasifier. A workable probe design requires finding answers to crucial questions involving the probe materials. We report on attempts to answer those questions. We attempted to measure the laser-input power at a wavelength of 355 nm that would damage the ends of sapphire fiber optics. We were surprised and pleased to learn that they survived an input power density of about 3 x 10{sup 9} W/cm{sup 2}, which greatly exceeds the best that fused-silica fibers can do. During a run of our new simulator to obtain ... continued below

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8 pages

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Noel, Bruce W. April 15, 2001.

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Description

This progress report covers continuing work to develop a temperature probe for a coal gasifier. A workable probe design requires finding answers to crucial questions involving the probe materials. We report on attempts to answer those questions. We attempted to measure the laser-input power at a wavelength of 355 nm that would damage the ends of sapphire fiber optics. We were surprised and pleased to learn that they survived an input power density of about 3 x 10{sup 9} W/cm{sup 2}, which greatly exceeds the best that fused-silica fibers can do. During a run of our new simulator to obtain an upgraded calibration curve for the improved YAG:Dy phosphors, we found that the phosphor appeared to form a eutectic, with the fused-silica cuvette used to hold the phosphor, when the temperature exceeded 1450 C. This result could have substantial ramifications in this and other high-temperature applications. Our new proprietary detector package that replaced the original photomultiplier tube gave excellent results, with much better signal-to-noise ratio at a given temperature than the old package. Our new plasma-spraying operation has succeeded in spraying YAG, which we think may be a technological breakthrough.

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8 pages

Notes

OSTI as DE00813681

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  • Other Information: PBD: 15 Apr 2001

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  • Report No.: NONE
  • Grant Number: FC26-99FT40686
  • DOI: 10.2172/813681 | External Link
  • Office of Scientific & Technical Information Report Number: 813681
  • Archival Resource Key: ark:/67531/metadc735201

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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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  • April 15, 2001

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • Jan. 4, 2017, 1:48 p.m.

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Noel, Bruce W. A DEVELOPMENT OF ON-LINE TEMPERATURE MEASUREMENT INSTRUMENTATION FOR GASIFICATION PROCESS CONTROL, report, April 15, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc735201/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.