期刊
BIORESOURCE TECHNOLOGY
卷 244, 期 -, 页码 125-131出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.07.128
关键词
Photoionization time-of-flight mass spectrometry; Pyrolysis; Coal; Corn
资金
- Natural Science Foundation of China [51506200]
- Ministry of Science and Technology of China [2017YFA0402804]
- Recruitment Program of Global Youth Experts
With the aim to support the experimental tests in a circulating fluidized bed pilot plant, the pyrolysis processes of coal, corn, and coal-corn blend have been studied with an online pyrolysis photoionization time-of-flight mass spectrometry (Py-PI-TOFMS). The mass spectra at different temperatures (300-800 degrees C) as well as time-evolved profiles of selected species were measured. The pyrolysis products such as alkanes, alkenes, phenols, aromatics, as well as nitrogen-and sulfur-containing species were detected. As temperature rises, the relative ion intensities of high molecular weight products tend to decrease, while those of aromatics increase significantly. During the co-pyrolysis, coal can promote the reaction temperature of cellulose in corn. Time-evolved profiles demonstrate that coal can affect pyrolysis rate of cellulose, hemicellulose, and lignin of corn in blend. This work shows that Py-PI-TOFMS is a powerful approach to permit a better understanding of the mechanisms underlying the co-pyrolysis of coal and biomass.
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