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Hyphenation of two simultaneously employed soft photo ionization mass spectrometers with thermal analysis of biomass and biochar.

Thermochim. Acta 551, 155-163 (2013)
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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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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter 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
Zeitschrift Thermochimica Acta
Quellenangaben Band: 551, Heft: , Seiten: 155-163 Artikelnummer: , Supplement: ,
Verlag Elsevier
Begutachtungsstatus Peer reviewed