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Open Access Green as soon as Postprint is submitted to ZB.
Hyphenation of two simultaneously employed soft photo ionization mass spectrometers with thermal analysis of biomass and biochar.
Thermochim. Acta 551, 155-163 (2013)
Evolved gas analysis (EGA) is a powerful and complementary tool for Thermal Analysis. In this context, two time-of-flight mass spectrometers with different soft photo-ionization techniques are simultaneously hyphenated to a thermo balance and applied in form of a newly developed prototype for EGA of pyrolysis gases from biomass and biochar. Resonance enhanced multi-photon ionization (REMPI) is applied for selective analysis of aromatic species. Furthermore, single photon ionization (SPI) using VUV light supplied by an electron-beam pumped excimer light source (EBEL) was used to comprehensively ionize (nearly) all organic molecules. The soft ionization capability of photo-ionization techniques allows direct and on-line analysis of the evolved pyrolysis gases. Characteristic mass spectra with specific patterns could be obtained for the miscellaneous biomass feeds used. Temperature profiles of the biochars reveal a desorption step, followed by pyrolysis as observed for the biomasses. Furthermore, the potential for kinetic studies is apparent for this instrumental setup.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Rempi ; Spi ; Ega ; Lignin ; Biomass Pyrolysis; Enhanced Multiphoton Ionization ; Polycyclic Aromatic-hydrocarbons ; Gas-chromatographic Separation ; Electron-impact Ionization ; Cross-sections ; Light-source ; Structural Characterization ; Degradation Products ; Cigarette-smoke ; Excimer Light
ISSN (print) / ISBN
0040-6031
e-ISSN
0040-6031
Journal
Thermochimica Acta
Quellenangaben
Volume: 551,
Pages: 155-163
Publisher
Elsevier
Non-patent literature
Publications
Reviewing status
Peer reviewed