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Ultraviolet Absorption Cross Sections of KOH and KCl for Nonintrusive Species-Specific Quantitative Detection in Hot Flue Gases

Weng, Wubin LU ; Brackmann, Christian LU ; Leffler, Tomas LU ; Aldén, Marcus LU and Li, Zhongshan LU (2019) In Analytical Chemistry1949-01-01+01:00
Abstract


An understanding of potassium chemistry in energy conversion processes supports the development of complex biomass utilization with high efficiency and low pollutant emissions. Potassium exists mainly as potassium hydroxide (KOH), potassium chloride (KCl), and atomic potassium (K) in combustion and related thermochemical processes. We report, for the first time, the measurement of the ultraviolet (UV) absorption cross sections of KOH and KCl at temperatures between 1300 K and 1800 K, using a newly developed method. Using the spectrally resolved UV absorption cross sections, the concentrations of KOH and KCl were measured simultaneously. In addition, we measured the... (More)


An understanding of potassium chemistry in energy conversion processes supports the development of complex biomass utilization with high efficiency and low pollutant emissions. Potassium exists mainly as potassium hydroxide (KOH), potassium chloride (KCl), and atomic potassium (K) in combustion and related thermochemical processes. We report, for the first time, the measurement of the ultraviolet (UV) absorption cross sections of KOH and KCl at temperatures between 1300 K and 1800 K, using a newly developed method. Using the spectrally resolved UV absorption cross sections, the concentrations of KOH and KCl were measured simultaneously. In addition, we measured the concentrations of atomic K using tunable diode laser absorption spectroscopy, both at 404.4 and 769.9 nm. The 404.4 nm line was utilized to expand the measurement dynamic range to higher concentrations. A constant amount of KCl was seeded into premixed CH
4
/air flames with equivalence ratios varied from 0.67 to 1.32, and the concentrations of KOH, KCl, and atomic K in the hot flue gas were measured nonintrusively. The results indicate that these techniques can provide comprehensive data for quantitative understanding of the potassium chemistry in biomass combustion/gasification.

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organization
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Contribution to journal
publication status
published
subject
in
Analytical Chemistry1949-01-01+01:00
publisher
The American Chemical Society
external identifiers
  • scopus:85063368981
ISSN
0003-2700
DOI
10.1021/acs.analchem.9b00203
language
English
LU publication?
yes
id
6e8f28e1-c449-4794-a4a5-ff36f48fc275
date added to LUP
2019-04-08 14:23:17
date last changed
2019-04-30 04:10:34
@article{6e8f28e1-c449-4794-a4a5-ff36f48fc275,
  abstract     = {<p><br>
                                                         An understanding of potassium chemistry in energy conversion processes supports the development of complex biomass utilization with high efficiency and low pollutant emissions. Potassium exists mainly as potassium hydroxide (KOH), potassium chloride (KCl), and atomic potassium (K) in combustion and related thermochemical processes. We report, for the first time, the measurement of the ultraviolet (UV) absorption cross sections of KOH and KCl at temperatures between 1300 K and 1800 K, using a newly developed method. Using the spectrally resolved UV absorption cross sections, the concentrations of KOH and KCl were measured simultaneously. In addition, we measured the concentrations of atomic K using tunable diode laser absorption spectroscopy, both at 404.4 and 769.9 nm. The 404.4 nm line was utilized to expand the measurement dynamic range to higher concentrations. A constant amount of KCl was seeded into premixed CH                             <br>
                            <sub>4</sub><br>
                                                         /air flames with equivalence ratios varied from 0.67 to 1.32, and the concentrations of KOH, KCl, and atomic K in the hot flue gas were measured nonintrusively. The results indicate that these techniques can provide comprehensive data for quantitative understanding of the potassium chemistry in biomass combustion/gasification.                         <br>
                        </p>},
  author       = {Weng, Wubin and Brackmann, Christian and Leffler, Tomas and Aldén, Marcus and Li, Zhongshan},
  issn         = {0003-2700},
  language     = {eng},
  month        = {01},
  publisher    = {The American Chemical Society},
  series       = {Analytical Chemistry1949-01-01+01:00},
  title        = {Ultraviolet Absorption Cross Sections of KOH and KCl for Nonintrusive Species-Specific Quantitative Detection in Hot Flue Gases},
  url          = {http://dx.doi.org/10.1021/acs.analchem.9b00203},
  year         = {2019},
}