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On-Line Composition Analysis of Complex Hydrocarbon Streams by Time-Resolved Fourier Transform Infrared Spectroscopy
Christopher Sauer1, Anders Lorén2, Andreas Schaefer1
1Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
Analytical Chemistry
|September 22, 2021
Summary
This study introduces a new method for analyzing plant biomass composition using Fourier transform infrared spectroscopy and ion-molecule-reaction mass spectrometry (IMR-MS). This technique allows for real-time monitoring of chemical reactions and product formation from biomass conversion.
Area of Science:
- Chemical Engineering
- Spectroscopy
- Catalysis
Background:
- Accurate on-line composition analysis of hydrocarbon mixtures is crucial for process streams and heterogeneous catalysis research.
- Processed plant biomass streams require advanced analytical methods for understanding their chemical conversion.
- Green aromatic production from biomass is a key area in sustainable chemistry.
Purpose of the Study:
- To demonstrate a novel analytical approach for real-time compositional analysis of processed plant biomass streams.
- To investigate the catalytic conversion of 2,5-dimethylfuran into valuable green aromatics (BTX) using zeolite β.
- To enable the study of reaction dynamics, selectivity, and compositional changes under transient conditions.
Main Methods:
- Combination of time-resolved Fourier transform infrared spectroscopy and ion-molecule-reaction mass spectrometry (IMR-MS).
- Utilized biomass-derived 2,5-dimethylfuran as a model compound for catalytic conversion studies.
- Achieved simultaneous determination and quantification of numerous conversion products with a temporal resolution of 4 minutes.
Main Results:
- Successfully analyzed complex hydrocarbon mixtures from processed plant biomass streams in real-time.
- Identified and quantified multiple products from the catalytic conversion of 2,5-dimethylfuran over zeolite β.
- Observed dynamic changes in reaction pathways, including increasing isomerization and decreasing BTX/olefin formation as the catalyst aged.
Conclusions:
- The integrated spectroscopic and mass spectrometry method provides a powerful tool for on-line analysis of biomass conversion.
- This approach facilitates detailed studies of catalyst activity, selectivity, and stability under dynamic reaction conditions.
- The findings contribute to the development of efficient processes for producing green aromatics from renewable biomass resources.
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