(453c) Infrared Spectroscopy and Thermo Gravimetric Analysis for Cellulose and Residue by Hydrothermal Decomposition

Abstract: Under the background of energy and resource shortage and the environment pollution, the utilization and research of biomass wastes as a kind of resource attracting worldwide attention. Hydrothermal reaction provides an effective method for the reutilization of biomass wastes. The disposal and reutilization of biomass wastes were realized by hydrothermal reaction in batch hydrothermal reactor. By using Fourier transform spectrum analysis, the microcosmic structure of micro crystallite cellulose and its products were compared. The pyrolysis behavior of cellulose was studied by thermo gravimetric analysis (TGA). The experimental results showed that the molecular structure of micro crystallite cellulose changed obviously and the decomposition of micro crystallite cellulose mainly occurred at the temperature range of 250-400°C. The weight loss(TG) and the rate of weight loss(DTG) shift to higher temperature region with the increase of heating-up rate. The thermal dynamics for biomass wastes was coincidence to the first order reaction dynamics by Coat-Redfern analysis. The FTIR and TGA analysis indicated that the hydrothermal decomposition of micro crystallite cellulose was composed by low temperature hydrolysis and high temperature pyrolysis.