Nanostructure and reactivity of soot from biofuel 2,5-dimethylfuran pyrolysis with CO2 additions

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This paper investigated the nanostructure and oxidation reactivity of soot generated from biofuel 2,5-dimethylfuran pyrolysis with different CO2 additions and different temperatures in a quartz tube flow reactor. The morphology and nanostructure of soot samples were characterized by a low and a high resolution transmission electron spectroscopy (TEM and HRTEM) and an X-ray diffraction (XRD). The oxidation reactivity of these samples was explored by a thermogravimetric analyzer (TGA). Different soot samples were collected in the tail of the tube. With the increase of temperature, the soot showed a smaller mean particle diameter, a longer fringe length, and a lower fringe tortuosity, as well as a higher degree of graphization. However, the variation of soot nanostructures resulting from different CO2 additions was not linear. Compared with 0%, 50%, and 100% CO2 additions at one fixed temperature, the soot collected from the 10% CO2 addition has the highest degree of graphization and crystallization. At three temperatures of 1173 K, 1223 K, and 1273 K, the mean values of fringe length distribution displayed a ranking of 10% CO2 > 100% CO2 > 50% CO2 while the mean particle diameters showed the same order. Furthermore, the oxidation reactivity of different soot samples decreased in the ranking of 50% CO2 addition > 100% CO2 addition > 10% CO2 addition, which was equal to the ranking of mean values of fringe tortuosity distribution. The result further confirmed the close relationship between soot nanostructure and oxidation reactivity.

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This work was supported by the National Natural Science Foundation of China (Grant Nos. 51822605 and 51576100) and 333 Program of Jiangsu Province (No. BRA2017428).

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Correspondence to Dong Liu.

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Zhang, L., Yang, K., Zhao, R. et al. Nanostructure and reactivity of soot from biofuel 2,5-dimethylfuran pyrolysis with CO2 additions. Front. Energy (2020) doi:10.1007/s11708-020-0658-3

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  • 2, 5-dimethylfuran pyrolysis
  • soot
  • CO2 addition
  • nanostructure
  • reactivity