主催: 社団法人 日本エネルギー学会 石炭科学部会, 社団法人 日本エネルギー学会 コークス工学研究部会
共催: 化学工学会 エネルギー部会, 日本学術振興会 石炭・炭素資源利用技術第148委員会, 日本エネルギー学会 重質油部会, 岐阜大学
会議名: 第47回石炭科学会議
回次: 47
開催地: 長良川国際会議場
開催日: 2010/09/21 - 2010/09/22
p. 2-3
The molecular properties of asphaltenes have been the subject of uncertainty in the literature; especially the molecular architecture is still a matter of debate. Some literature reports provide evidence that the contrast of petroleum asphaltenes versus coal asphaltenes is useful for understanding the governing principles of asphaltene identity. Here, fluorescence correlation spectroscopy has been employed to measure the diffusion constants of asphaltenes and along with the heaviest resin fractions derived from the distillation resid from coal liquefaction fluids. These are compared with the same measurements on petroleum asphaltenes. In addition, ^<13>C NMR is performed on these samples to correlate molecular properties with diffusion constants. These results confirm that the molecular sizes of these coal-derived asphaltenes are much smaller than virgin petroleum asphaltenes. In addition, There is a molecular continuum from lighter to heavier fractions in these materials. The small size of coal asphaltenes is correlated with a small alkane carbon constraints for understanding asphaltene molecular architecture.
