Two waste biomass materials, pine needle (PN) and corn stalk (CS), were pyrolyzed at different temperatures (200–900 °C). The organic functional groups and carbonaceous structure of the biomass chars were characterized by Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy, respectively. The combustion characteristics and kinetics of biomass chars were investigated by thermogravimetric analysis (TGA). The content of carbon-, hydrogen-, and oxygen-containing functional groups in the biomass samples decreases with an increase in preparation temperature, leading to more aromatic macromolecular structure at elevated pyrolysis temperatures. With increasing pyrolysis temperature, the comprehensive combustibility index (S) of both chars related to combustion reactivity generally decreases especially for CS char because of the loss of active groups. However, the Raman spectra show that the degree of order decreases with increasing pyrolysis temperature from 400 to 700 °C because of the generation of isolated sp2 carbon.
Effect of Char Structure Evolution During Pyrolysis on Combustion Characteristics and Kinetics of Waste Biomass
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received October 10, 2017; final manuscript received January 12, 2018; published online March 20, 2018. Editor: Hameed Metghalchi.
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Yin, Y., Yin, J., Zhang, W., Tian, H., Hu, Z., Ruan, M., Song, Z., and Liu, L. (March 20, 2018). "Effect of Char Structure Evolution During Pyrolysis on Combustion Characteristics and Kinetics of Waste Biomass." ASME. J. Energy Resour. Technol. July 2018; 140(7): 072203. https://doi.org/10.1115/1.4039445
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