Experimental Design of Thermogravimetric Teaching Based on Coal and Biomass Pyrolysis
In order to improve the level of undergraduate experimental teaching,the integration of scientific research and experimental teaching becomes the trend of experimental curriculum reform.Aiming at the problem that students have difficulty to understand organic macromolecules structural and thermal conversion mechanism of coal in the course of"Coal Chemistry and Coal Quality Analysis",a thermogravimetric teaching experiment based on coal and biomass pyrolysis experiments is designed.In the TGA reactor,lignite and biomass are pyrolyzed at a heating rate of 10 K/min from room temperature to 1100℃and atmospheric pressure.It can be found that the weight loss rate of biomass is greater than that of lignite,since the biomass contains higher volatile matter.With the increase of pyrolysis temperature,lignite and biomass go out through the drying and desorption stage(room temperature～300℃),main pyrolysis stage(300～600℃)and coking stage(after high temperature 900℃).However,mechanisms of their weight loss are not the same,due to the differences in the properties and components of lignite and biomass.This experimental can help students to better understand and master the properties,utilizations,and transformation principles and processes of coal.It can also help students to understand the thermal transformation characteristics of biomass,and strengthen students' interest in scientific research and learning.
coal pyrolysisthermogravimetrylaboratory courseteaching research
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