Combustion Exhaust Measurements Using a Diode-Laser-Based Ultraviolet Absorption Sensor for Nitric Oxide

2003 ◽  
Author(s):  
Robert Lucht ◽  
Rodolfo Barron-Jimenez ◽  
Sherif Hanna ◽  
Thomas Anderson ◽  
Michael Brown ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Diode Laser ◽  
Ultraviolet Absorption ◽  
Exhaust Measurements ◽  
Combustion Exhaust

Combustion exhaust measurements of nitric oxide with an ultraviolet diode-laser-based absorption sensor

2005 ◽  
Vol 44 (8) ◽  
pp. 1491 ◽  
Author(s):  
Thomas N. Anderson ◽  
Robert P. Lucht ◽  
Rodolfo Barron-Jimenez ◽  
Sherif F. Hanna ◽  
Jerald A. Caton ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Diode Laser ◽  
Exhaust Measurements ◽  
Combustion Exhaust

Application of a Diode-Laser-Based Ultraviolet Absorption Sensor forin SituMeasurements of Atomic Mercury in Coal-Combustion Exhaust

2008 ◽  
Vol 22 (5) ◽  
pp. 3029-3036 ◽  
Author(s):  
Jesse K. Magnuson ◽  
Thomas N. Anderson ◽  
Robert P. Lucht ◽  
Udayasarathy A. Vijayasarathy ◽  
Hyukjin Oh ◽  
...  
Keyword(s):  
Diode Laser ◽  
Coal Combustion ◽  
Ultraviolet Absorption ◽  
Combustion Exhaust ◽  
Atomic Mercury

Diode-laser-based ultraviolet absorption sensor for nitric oxide

2002 ◽  
Vol 75 (1) ◽  
pp. 113-117 ◽  
Author(s):  
S.F. Hanna ◽  
R. Barron-Jimenez ◽  
T.N. Anderson ◽  
R.P. Lucht ◽  
J.A. Caton ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Diode Laser ◽  
Ultraviolet Absorption

In situ measurements of nitric oxide in coal-combustion exhaust using a sensor based on a widely tunable external-cavity GaN diode laser

2007 ◽  
Vol 46 (19) ◽  
pp. 3946 ◽  
Author(s):  
Thomas N. Anderson ◽  
Robert P. Lucht ◽  
Soyuz Priyadarsan ◽  
Kalyan Annamalai ◽  
Jerald A. Caton
Keyword(s):  
Nitric Oxide ◽  
Diode Laser ◽  
Coal Combustion ◽  
External Cavity ◽  
In Situ Measurements ◽  
Combustion Exhaust

Diode-Laser-Based Sensor Measurements of Nitric Oxide and Carbon Monoxide in Combustion Exhaust Streams

2003 ◽  
Author(s):  
Thomas N. Anderson ◽  
Rodolfo Barron-Jimenez ◽  
Jerald A. Caton ◽  
Robert P. Lucht ◽  
Sukesh Roy ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Carbon Monoxide ◽  
Detection Limit ◽  
Diode Laser ◽  
Path Length ◽  
Barium Borate ◽  
Co Sensor ◽  
No Sensor ◽  
Absorption Measurements ◽  
Frequency Mixing

All-solid-state continuous-wave (cw) laser systems for ultraviolet (UV) absorption measurements of the nitric oxide (NO) molecule and mid-infrared (IR) absorption measurements of carbon monoxide (CO) were developed and demonstrated. For the NO sensor, 250 nW of tunable cw UV radiation at 226.8 nm is produced by sum-frequency-mixing in a beta-barium borate crystal. For the CO sensor, 2μW of tunable cw IR radiation at 4.5 μm is produced by difference-frequency mixing in a periodically-poled lithium niobate crystal. A tunable external-cavity diode laser (ECDL) provides one of the fundamental beams for both processes so that the wavelength of the generated UV/IR can be tuned over NO/CO absorption lines to produce a fully resolved absorption spectrum. The sensors were used for measurements in the exhaust stream of an operating auxiliary power unit (APU) gas turbine engine and a well-stirred reactor (WSR). During these tests, NO was measured in the exhaust at levels below 10 ppm. For measurements at levels above 20 ppm, the NO emission levels obtained using the new sensor agreed with the results of probe sampling chemiluminescent analyzer results to within 10%. A detection limit of 0.8 ppm of per meter path length at 1000 K is estimated for the NO sensor. Measurements with the CO sensor demonstrated an agreement with extractive probe sampling to within 15%. The estimated detection limit of the CO sensor is a few ppm per meter path length at 1000 K.

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