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Diode laser measurements of ammonia ...

Webber, Michael Evan.

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Diode laser measurements of ammonia and carbon dioxide for combustion and bioreactor applications.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Diode laser measurements of ammonia and carbon dioxide for combustion and bioreactor applications./
作者:	Webber, Michael Evan.
面頁冊數:	133 p.
附註:	Adviser: Ron Hanson.
Contained By:	Dissertation Abstracts International62-01B.
標題:	Chemistry, General. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3002056
ISBN:	049311033X

Diode laser measurements of ammonia and carbon dioxide for combustion and bioreactor applications.
Webber, Michael Evan.

Diode laser measurements of ammonia and carbon dioxide for combustion and bioreactor applications. - 133 p.

Adviser: Ron Hanson.

Thesis (Ph.D.)--Stanford University, 2001.

Diode laser sensors based on absorption spectroscopy techniques were designed and demonstrated for three applications: (1) <italic>in situ </italic> NH3 monitoring for combustion emissions using laser sources near 1.5 μm; (2) <italic>in situ</italic> CO2 monitoring in combustion zones using lasers near 2 μm; and (3) field measurements of NH3 and CO2 near 2 μm in the vent gases of a spacecraft bioreactor.

ISBN: 049311033XSubjects--Topical Terms:

1021807
Chemistry, General.

Diode laser measurements of ammonia and carbon dioxide for combustion and bioreactor applications.
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100 1 $a Webber, Michael Evan. $3 1252940
245 1 0 $a Diode laser measurements of ammonia and carbon dioxide for combustion and bioreactor applications.
300 $a 133 p.
500 $a Adviser: Ron Hanson.
500 $a Source: Dissertation Abstracts International, Volume: 62-01, Section: B, page: 0509.
502 $a Thesis (Ph.D.)--Stanford University, 2001.
520 $a Diode laser sensors based on absorption spectroscopy techniques were designed and demonstrated for three applications: (1) <italic>in situ </italic> NH3 monitoring for combustion emissions using laser sources near 1.5 μm; (2) <italic>in situ</italic> CO2 monitoring in combustion zones using lasers near 2 μm; and (3) field measurements of NH3 and CO2 near 2 μm in the vent gases of a spacecraft bioreactor.
520 $a Ammonia spectroscopy near 1.5 μm was investigated to select transitions appropriate for trace ammonia detection in air-quality and combustion emissions-monitoring applications using diode lasers. Six ammonia features were selected for these trace-gas detection applications based on their transition strengths and isolation from interfering species. Ammonia slip was measured in the exhaust above an atmospheric pressure premixed ethylene-air burner to demonstrate the feasibility of the <italic>in situ</italic> diode laser sensor for Thermal DeNO<italic> x</italic> or Selective Catalytic Reduction applications.
520 $a High-resolution absorption measurements of CO2 were made in a heated static cell and in the combustion region above a flat-flame burner for the development of an <italic>in situ</italic> CO2 combustion diagnostic based on a diode laser operating near 2.0 μm. Measurements of spectroscopic parameters such as the linestrength, self-broadening coefficient and line position were made for the R(50) transition, and an improved value for the linestrength is reported. The combustion product mole fractions of CO2 above a flat-flame burner were determined <italic>in situ</italic> to verify the measured spectroscopic parameters and to demonstrate the feasibility of the diode laser sensor.
520 $a Ammonia spectra near 2 μm were studied with external cavity diode lasers to select appropriate transitions for monitoring trace species concentration in the vent gases of a bioreactor. The fundamental spectroscopic parameters of the selected and neighboring transitions were measured to confirm the spectroscopic database using a DFB diode laser. The 2 μm laser was aligned into a sampling sensor system designed at Rice University to measure NH3 concentration in the vent gases of a groundtest bioreactor at NASA-JSC and to monitor the potential toxicity of space cabin indoor air quality. The same laser probed CO2's R(50) transition to assess overall bioreactor health and carbon conversion efficiency. The measurements demonstrated the sensor's ability to track changes in NH3 and CO2 concentration due to different bioreactor events.
520 $a All three projects in this work have led to improvements in the published spectroscopic database for NH3 or CO2, and have established the optimum wavelengths to be employed by diode-laser based sensors for different industrial applications.
590 $a School code: 0212.
650 4 $a Chemistry, General. $3 1021807
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0485
690 $a 0548
710 2 0 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 62-01B.
790 $a 0212
790 1 0 $a Hanson, Ron, $e advisor
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3002056