TG-FTIR STUDY ON PYROLYSIS OF TWO DIFFERENT WOOD SPECIES BASED ON COMPOSITIONAL ANALYSIS

摘要

IntroductionPyrolysis behavior of biomass is usually studied based on three main components, i.e. Cellulose, hemicellulose and lignin. The quantification of different components is performed by a set of extractions, each able to remove one component leaving the others undisturbed. There are many analytical methods, and Van Soest method [1] is often used according to its accuracy in quantification and high purity of the fractions. The technology of Thermo gravimetric analyzer coupled with Fourier Transform Infrared Spectrometer (TG-FTIR) has been adopted widely considering the advantage of online gas analysis. Bassilakis et al. [2] studied the pyrolysis behavior of biomass and three model compounds on a TG FTIR system, and reported the product-evolution patterns. Later they used the experimental results to determine kinetic parameters, which were incorporated into a pyrolysis model to predict product yields [3]. The previous works paid much attention to the pyrolysis behavior of model components extracted from biomass and the blends of them. Few studies were carried out on that of the detergent fibres which contained different components present in the raw biomass. The aim of this study was to explore the characteristic pyrolysis behavior of each fibre due to its individual component characteristics, and conclude the contribution of the main components to pyrolysis kinetics and product evolution.