31 December 1993 In-situ fiber optic FTIR spectroscopy for coal liquefaction processes
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Proceedings Volume 2069, Optical Methods for Chemical Process Control; (1993) https://doi.org/10.1117/12.166281
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States
The development of diagnostic instrumentation for monitoring coal liquefaction process streams is discussed. A sapphire optical fiber was used as an attenuated total reflectance (ATR) element in conjunction with Fourier transform infrared (FT-IR) spectrometry to probe harsh liquefaction process streams. ATR provides a short, reproducible pathlength which allows for the analysis of highly absorbing materials, such as liquid hydrocarbons, and the properties of sapphire are well suited for the analysis of high temperature and high pressure process streams. A test cell was constructed which allowed in-situ monitoring of coal liquefaction reactions at 400 degree(s)C and 3000 psig. The cell incorporated a sapphire optical fiber as an ATR sensing element which was coupled to an FT-IR spectrometer using zirconium fluoride fiber optic cables. The spectra provide qualitative information about the liquefaction process.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael A. Serio, Hsisheng Teng, Kim S. Knight, Stephen C. Bates, Stuart Farquharson, Anthony S. Bonanno, Peter R. Solomon, William A. Stevenson, Mark A. Druy, Paul J. Glatkowski, James A. Harrington, Rick K. Nubling, Jack Y. Ding, and Alfred G. Comolli "In-situ fiber optic FTIR spectroscopy for coal liquefaction processes", Proc. SPIE 2069, Optical Methods for Chemical Process Control, (31 December 1993); doi: 10.1117/12.166281; https://doi.org/10.1117/12.166281

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