time resolved ft-ir analysis of combustion of ethanol, e85, and gasoline in an internal combustion...
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![Page 1: Time Resolved FT-IR Analysis of Combustion of Ethanol, E85, and Gasoline in an Internal Combustion Engine Allen R. White, Stephen Sakai Department of Mechanical](https://reader036.vdocuments.net/reader036/viewer/2022062423/56649cef5503460f949be54f/html5/thumbnails/1.jpg)
Time Resolved FT-IR Analysis of Combustion of Ethanol, E85, and Gasoline in an Internal Combustion Engine
Allen R. White, Stephen SakaiDepartment of Mechanical EngineeringRose-Hulman Institute of Technology
Dr. Rebecca B. DeVasherDepartment of ChemistryRose-Hulman Institute of Technology
Advanced Combustion Laboratory
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Why Look at Combustion with an FT-IR?• Combustion process is still largely unknown
• Examine progression of chemical species during combustion
• Possibility of increasing combustion efficiency and reducing harmful emissions
• Show engineering students the utility of spectroscopy and physical chemistry
Advanced Combustion Laboratory
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Why Look at Combustion with an FT-IR?
Advanced Combustion Laboratory
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Megatech Mk III Visible IC Engine
Advanced Combustion Laboratory
Visible Spark Ignition Four-Cycle Internal Combustion Engine
Fitted with Sapphire Combustion Chamber
Ethanol/E85/Gasoline Fueled
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Experimental Setup
Advanced Combustion Laboratory
Bruker Vertex 70
Acoustic barrier
Combustionchamber
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Initial Infrared Step-Scan Data
Advanced Combustion Laboratory
15 sample average16 cm-1 Resolution
Time Wavenumber
Amplitude
t=0 at ignition
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Infrared Spectroscopy Interest for Automotive Purposes
Advanced Combustion Laboratory
1942 Packard
Ganske, Jane A. The Chemical Educator , Vol. 8 No.6 (2003)
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Second Iteration of Sapphire Chamber
Advanced Combustion Laboratory
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Advanced Combustion Laboratory
Comparison of Old and New Data
Combustion PathOptical Path
Top
Side
Top
Side
Old Chamber
New Chamber
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Advanced Combustion Laboratory
Initial Data with New Engine Configuration
15 sample average16 cm-1 Resolution
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Advanced Combustion Laboratory
Comparison of Old and New Data
15 sample average
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Advanced Combustion Laboratory
Sample Data with New Engine Configuration
15 sample average16 cm-1 Resolution
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Advanced Combustion Laboratory
Sample Data with New Engine Configuration
15 sample average16 cm-1 Resolution
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Advanced Combustion Laboratory
New Engine Data with significant averaging (390 samples)
16 cm-1 Resolution
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Advanced Combustion Laboratory
E85 New Engine Data with Averaging (30 samples)
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Advanced Combustion Laboratory
Gasoline New Engine Data with Averaging (15 samples)
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Advanced Combustion Laboratory
Gasoline: Cylinder Deposits! (E85 similar)
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Advanced Combustion Laboratory
Comparison of CO2 peaks:
Time
Ampl
itude
2242 cm-1
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Conclusions
Advanced Combustion Laboratory
Low signal to noise ratio due to:• Combustion variability
• Combustion mixture variation
• Step-scan mirror location error due to vibrations from combustion
• Line-of-sight averaging
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Future Work
Advanced Combustion Laboratory
SPIE Fall 2010:
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Future Work
Advanced Combustion Laboratory
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Acknowledgements
Stephen Sakai
Rose-Hulman Institute of TechnologyLilly Foundation Faculty Success Grant
Rose-Hulman Institute of TechnologyDean’s Equipment Investment Fund
Advanced Combustion Laboratory
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Advanced Combustion Laboratory
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Areas of Interest
Advanced Combustion Laboratory
Gasoline Combustion Spectra from 1942 Packard
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Areas of Interest
Advanced Combustion Laboratory
High Resolution Scan of Ethanol – 200 Scans @ 1 cm-1 Resolution
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Advanced Combustion Laboratory
t = 0
t = 5ms
Progression of Chemical Species
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Advanced Combustion Laboratory
t = 10ms
t = 15ms
Progression of Chemical Species
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Advanced Combustion Laboratory
t = 20ms
t = 25ms
Progression of Chemical Species