Tunable diode-laser absorption measurements of methane at elevated temperatures

V. Nagali; S. I. Chou; D. S. Baer; R. K. Hanson; J. Segall

doi:10.1364/AO.35.004026

Applied Optics
Vol. 35,
Issue 21,
pp. 4026-4032
(1996)
•https://doi.org/10.1364/AO.35.004026

Tunable diode-laser absorption measurements of methane at elevated temperatures

V. Nagali, S. I. Chou, D. S. Baer, R. K. Hanson, and J. Segall

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
V. Nagali, S. I. Chou, D. S. Baer, R. K. Hanson, and J. Segall, "Tunable diode-laser absorption measurements of methane at elevated temperatures," Appl. Opt. 35, 4026-4032 (1996)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Abstract

A diode-laser sensor system based on absorption spectroscopy techniques has been developed to monitor CH₄ nonintrusively in high-temperature environments. Fundamental spectroscopic parameters, including the line strengths of the transitions in the R(6) manifold of the 2ν ₃ band near 1.646 μm, have been determined from high-resolution absorption measurements in a heated static cell. In addition, a corrected expression for the CH₄ partition function has been validated experimentally over the temperature range from 400 to 915 K. Potential applications of the diode-laser sensor system include process control, combustion measurements, and atmospheric monitoring.

Full Article | PDF Article

More Like This

Diode-laser absorption measurements of CO₂ near 2.0 μm at elevated temperatures

Radu M. Mihalcea, Douglas S. Baer, and Ronald K. Hanson
Appl. Opt. 37(36) 8341-8347 (1998)

Diode laser sensor for measurements of CO, CO₂, and CH₄ in combustion flows

Radu M. Mihalcea, Douglas S. Baer, and Ronald K. Hanson
Appl. Opt. 36(33) 8745-8752 (1997)

Diode laser absorption measurements of CH₃Cl and CH₄ near 1.65 µm

Shang-I Chou, Douglas S. Baer, and Ronald K. Hanson
Appl. Opt. 36(15) 3288-3293 (1997)

Previous Article Next Article

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (4)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (13)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Line	ν (cm⁻¹)	S (cm⁻² atm⁻¹) (× 10⁻²)	E″ (cm⁻¹)
1	6076.928	1.192	219.9135
2	6076.935	1.899	219.9368
3	6076.954	3.000	219.9199
4	6077.028	1.768	219.9413
5	6077.046	1.847	219.9150
6	6077.063	3.050	219.9452

Experiment	Pressure (Torr)	Temperature (°C)
1	3.06	19
2	8.02	19
3	9.90	20
4	12.87	20
5	6.71	20
6	5.00	22

Line	ν ₀ (cm⁻¹)	S (Ref. 14) (cm⁻² atm⁻¹)	∊ (Ref. 14) (%)	S (This Work) (cm⁻² atm⁻¹)	σ_expt (%)	∊ (%)	S − S (Ref. 14) (%)
1	6076.928	1.192 × 10⁻²	7.2	1.119 × 10⁻²	11.0	11	−6.1
2	6076.935	1.899 × 10⁻²	6.1	1.924 × 10⁻²	3.3	3	1.3
3	6076.954	3.000 × 10⁻²	1.0	3.010 × 10⁻²	0.6	2	0.3
4	6077.028	1.768 × 10⁻²	3.4	1.770 × 10⁻²	0.7	2	0.1
5	6077.046	1.847 × 10⁻²	3.1	1.848 × 10⁻²	2.7	3	0.1
6	6077.063	3.050 × 10⁻²	4.4	2.980 × 10⁻²	3.2	3	−2.3
Manifold		1.276 × 10⁻¹		1.265 × 10⁻¹	0.9	2	−0.8

Coefficient	70 < T < 405 K	405 < T < 2005 K
a	−1.74750 × 10¹	3.55130 × 10²
b	9.53750 × 10⁻¹	−1.11650
c	3.97580 × 10⁻³	7.14530 × 10⁻³
d	−8.18370 × 10⁻⁷	−1.61350 × 10⁻⁶

Line	ν (cm⁻¹)	S (cm⁻² atm⁻¹) (× 10⁻²)	E″ (cm⁻¹)
1	6076.928	1.192	219.9135
2	6076.935	1.899	219.9368
3	6076.954	3.000	219.9199
4	6077.028	1.768	219.9413
5	6077.046	1.847	219.9150
6	6077.063	3.050	219.9452

Abstract

Cited By

Figures (8)

Tables (4)

Equations (13)

Applied Optics