Journal
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
Volume 140, Issue 7, Pages -Publisher
ASME
DOI: 10.1115/1.4039445
Keywords
biomass char; pyrolysis; chemical structure; combustion characteristics; kinetics
Categories
Funding
- Open Fund of Innovation Platform of Hunan Provincial Education Department, China [17K002]
- National Natural Science Foundation of China [51206012, 51406016]
- Open Fund of Key Laboratory of Efficient & Clean Energy Utilization of Hunan Provincial Education Department, China [2016NGQ006]
- Open Fund of Key Laboratory of Renewable Energy Electric-Technology of Hunan Province [2012ZNDL005]
- National Training Program of Innovation and Entrepreneurship for Undergraduates [201410536010]
- Hunan Province Collaborative Innovation Center of Clean Energy and Smart Grid
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Two waste biomass materials, pine needle (PN) and corn stalk (CS), were pyrolyzed at different temperatures (200-900 degrees 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 degrees C because of the generation of isolated sp(2) carbon.
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