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Le LD, Tate JD, Seasholtz MB, et al. Development of a rapid on-line acetylene sensor for industrial hydrogenation reactor optimization using off-axis integrated cavity output spectroscopy. Appl Spectrosc. 2008;62(1):59-65doi: 10.1366/000370208783412654.
Le, L. D., Tate, J. D., Seasholtz, M. B., Gupta, M., Owano, T., Baer, D., Knittel, T., Cowie, A., & Zhu, J. (2008). Development of a rapid on-line acetylene sensor for industrial hydrogenation reactor optimization using off-axis integrated cavity output spectroscopy. Applied spectroscopy, 62(1), 59-65. https://doi.org/10.1366/000370208783412654
Le, Linh D, et al. "Development of a rapid on-line acetylene sensor for industrial hydrogenation reactor optimization using off-axis integrated cavity output spectroscopy." Applied spectroscopy vol. 62,1 (2008): 59-65. doi: https://doi.org/10.1366/000370208783412654
Le LD, Tate JD, Seasholtz MB, Gupta M, Owano T, Baer D, Knittel T, Cowie A, Zhu J. Development of a rapid on-line acetylene sensor for industrial hydrogenation reactor optimization using off-axis integrated cavity output spectroscopy. Appl Spectrosc. 2008 Jan;62(1):59-65. doi: 10.1366/000370208783412654. PMID: 18230209.
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Appl Spectrosc. 2008 Jan;62(1):59-65. doi: 10.1366/000370208783412654.

Development of a rapid on-line acetylene sensor for industrial hydrogenation reactor optimization using off-axis integrated cavity output spectroscopy.

Applied spectroscopy

Linh D Le, J D Tate, Mary Beth Seasholtz, Manish Gupta, Thomas Owano, Doug Baer, Trevor Knittel, Alan Cowie, Jie Zhu

Affiliations

  1. The Dow Chemical Company, 2301 N. Brazosport Blvd. Freeport, Texas 77541, USA.

PMID: 18230209 DOI: 10.1366/000370208783412654

Abstract

A spectroscopic analyzer has been developed for rapid, accurate quantification of acetylene and methyl acetylene in hydrocarbon cracked gas processing plants. The system utilizes off-axis integrated output cavity spectroscopy to measure the near-infrared, cavity-enhanced absorption spectrum of ethylene, methyl acetylene, and acetylene and employs a chemometric data analysis strategy to quantify the respective constituents. Initial tests verified that the instrument is capable of measuring, <0.050 ppmv of acetylene, has a precision of +/-0.025 ppmv, and can accurately determine acetylene concentrations with comparable accuracy to a gas chromatograph (+/-0.1 ppmv) in an actual process stream composition matrix under plant operating conditions. Subsequently, the prototype analyzer was installed in a hydrocarbon facility for field-trials, where its rapid response (< or =30 seconds or better) allowed it to measure transient acetylene and methyl acetylene fluctuations that were too fast for conventional methodologies. Moreover, the analyzer showed an extended dynamic range that enabled measurement of very high acetylene levels (0-1000 ppmv) during abnormal plant operations. Finally, two commercial acetylene analyzer systems with stream-switching capabilities were implemented in an industrial facility and initial results are presented.

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