A comparison of Raman and IR spectroscopies for the monitoring and evaluation of absorbent composition during CO 2 absorption processes
| Autor: | Robert Bennett, Will Conway, Dan Maher, Graeme Puxty |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Flue gas
Aqueous solution Chemistry Infrared 020209 energy Analytical chemistry Infrared spectroscopy 02 engineering and technology Management Monitoring Policy and Law Pollution Industrial and Manufacturing Engineering symbols.namesake General Energy Pilot plant 020401 chemical engineering 0202 electrical engineering electronic engineering information engineering symbols Amine gas treating 0204 chemical engineering Absorption (electromagnetic radiation) Raman spectroscopy |
| Zdroj: | International Journal of Greenhouse Gas Control. 49:281-289 |
| ISSN: | 1750-5836 |
| Popis: | The separation of CO 2 from flue gases by reactive chemical absorption using aqueous amines is likely to be a critical technology in the mitigation of global CO 2 emissions. The operation of large-scale CO 2 capture plants requires close monitoring of the absorbent composition to maintain the plant water balance and efficient CO 2 removal, and avoid excessive amine loss. Traditionally monitoring of composition is done offline by analytical methods that are manually intensive, with turn-around times of hours to days. This can lead to costly delays in changes to process operation. In this work the use of Raman and infrared (IR) spectroscopies coupled with Partial Least-Squares Regression are compared for the determination of absorbent composition in a binary amine mixture. These methods can be used online, or offline with an analysis time of minutes. Both laboratory and pilot plant samples were assessed. Both Raman and IR spectroscopies were found capable of determining the individual amine and CO 2 concentration of laboratory samples. However, only IR proved successful with pilot plant samples as Raman spectroscopy induced fluorescence that made the Raman technique (as used here) impractical. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect