Multivariate analysis of biomass pyrolysis vapor mass spectra using Pyrolysis Molecular Beam Mass Spectrometry - PCA, PLS, MCR

摘要

The thermo-decomposition of lignocellulosics has been studied for decades. Many techniques have been used to study the process under conditions chosen to yield practical and scientific insight into mechanism, kinetics and product yields. A unique, direct-sampling, mass spectrometric technique – Pyrolysis Molecular Beam Mass Spectrometry (Py-MBMS), has been demonstrated to be effective in monitoring final products as well as intermediates in vapor phase. By using this technique in previous biomass studies, large groups of sample can be easily identified based on their cell wall composition similarity and differences. Lignin content, syringyl to guaiacol (S/G) ratio can be estimated directly from the spectra. Also, it provides a rapid and accurate methodology to identify and quantify samples, other than biomass, and understand the fundamental chemistry that distinguishes those samples. Besides, the formation of thermo-decomposition products can be mapped and monitored, which suggests the mechanisms of pyrolysis and gasification.