Spectroscopy for Industrial Applications: High-Temperature Processes

Alexander Fateev, Helge Grosch, Sønnik Clausen, Emma J. Barton, Sergei N. Yurchenko, Jonathan Tennyson

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The continuous development of the spectroscopic databases brings new perspectives in the environmental and industrial on-line process control, monitoring and stimulates further optical sensor developments. This is because no calibration gases are needed and, in general, temperature-dependent spectral absorption features gases of interest fora specic instrument can in principle be calculated by knowing only the gas temperature and pressure in the process under investigation/monitoring. The latest HITRAN-2012 database contains IR/UV spectral data for 47 molecules and it is still growing. However use of HITRAN is limited to low-temperature processes (< 400 K) and therefore can be used for absorption spectra calculations at limited temperature/pressure ranges. For higher temperatures, the HITEMP-2010 database is available. Only a few molecules CO2, H2O, CO and NO are those of interest for e.g. various combustion and astronomical applications are included. In the recent few years, several efforts towards a developmentof hot line lists have been made; those have been implemented in the latest HITRAN-2012 database. High-resolution absorption measurements of NH3 (IR, 0.1 cm-1) and phenol (UV,0.019 nm) on a flow gas cell up to 800 K are presented. Molecules are of greatinterest in various high-temperature environments including exoplanets, combustion andgasication. Measured NH3 hot lines have been assigned and spectra have been comparedwith that obtained by calculations based on the BYTe hot line list. High-temperature NH3 absorption spectra have been used in the analysis of in situ high-resolution IRabsorption measurements on the producer gas in low-temperature gasication processon a large scale. High-resolution UV temperature-dependent absorption cross-sectionsof phenol are reported for the rst time. All UV data have been calibrated byrelevant GC/MS measurements. Use of the data is demonstrated by the analysis ofin situ UV absorption measurements on a small-scale low-temperature gasier. Acomparison between in situ, gas extraction and conventional gas sampling measurementsis presented. Overall the presentation shows an example of successful industrial and academic partnerships within the framework of national and international ongoing projects.
Original languageEnglish
Publication date2014
Number of pages1
Publication statusPublished - 2014
Event 13th HITRAN Conference - The Harvard-Smithsonian Center for Astrophysics, Cambridge, United States
Duration: 23 Jun 201425 Jun 2014


Conference 13th HITRAN Conference
LocationThe Harvard-Smithsonian Center for Astrophysics
CountryUnited States
Internet address

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