Quantitative Raman spectroscopy for the Ioncell® process: Part 2 quantification of ionic liquid degradation products and improvement of prediction performance through interval PLS

Chamseddine Guizani (Corresponding Author), Sanna Hellstén, Joanna Witos, Mikko Mäkelä, Michael Hummel, Herbert Sixta

Research output: Contribution to journalArticleScientificpeer-review

Abstract

One of the main issues associated with ionic liquids (ILs) is their recyclability. Viable recycling concepts can only be developed if one knows what is in the IL mixtures and solutions. In our previous work, we showed that it is possible to quantify water and 1.5-diazabicyclo[4.3.0]non-5- enium acetate [DBNH][OAc] IL components in liquid mixtures using Raman spectroscopy. In this regard, we considered Raman spectroscopy as a promising analytical method for the inline monitoring and control of the Ioncell process. In the present work, we push the limits of this analytical method further by extending it to more complex and realistic liquid mixtures including the hydrolysis product 1-(3-aminopropyl)-2- pyrrolidone (APP) that can be formed upon the reaction of 5-diazabicyclo[4.3.0]non-5-ene (DBN) with water. Quantifying APP is important in order to measure the extent of the hydrolysis reaction and apply the right corrective measures to reverse the reaction and to maintain the process within the optimal working conditions. The simultaneous quantification.

Original languageEnglish
Pages (from-to)9813-9824
Number of pages12
JournalCellulose
Volume27
Issue number17
DOIs
Publication statusPublished - Nov 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Chemometrics
  • Ioncell process
  • Ionic liquid
  • Raman spectroscopy

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