Determination and analysis of GC-MS and TG-DTA of straw gasification tar distillation

Abstract：In order to study the utilization of straw gasification tar, the pH value, condensation point, flash point, Engler viscosity, density and gross calorific value of the upper straw gasification tar distillation ranging from 112 ℃ to 150 ℃were determined.GC-MS analytic experiment and TG-DTA test of which were conducted by using gas chromatography-mass spectrometry and integrated thermal analyzer.The chemical compositions, the thermogravimetric (TG) curves and the differential thermal analysis (DTA) curves of sample were obtained.Comparative analyses of compounds, elements and diesel were conducted.Thermal analyses were carried out from three aspects of precipitation of volatiles and combustion characteristics, influence of heating rate, and kinetics.The results showed that aromatic hydrocarbon mass fraction in the sample was close to diesel oil.The combustion pollution of the sample with no sulfur, nitrogen, and the pollution was small.The sample was volatile and had a high mass fraction of volatiles.The volatiles were continuously precipitated after heat absorption and the precipitation was concentrated.The sample with low ash content was easy to burn out.It had the characteristics of liquid fuel spray combustion and had the possibility and value of being used as fuel for vehicles.

Keyword：straw gasification tar;GC-MS analysis;TG-DTA;distillation;