FTIR study on structural changes of different-rank coals caused by single/multiple extraction with cyclohexanone and NMP/CS2 mixed solvent
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- 作者：Bin Tiana ; Ying&ndash ; yun Qiaoa ; Qiao_yingyun@126.com" class="auth_mail" title="E-mail the corresponding author ; Yuan&ndash ; yu Tiana ; c ; tianyy1008@126.com" class="auth_mail" title="E-mail the corresponding author ; Ke&ndash ; chang Xieb ; Qing Liuc ; Hai&ndash ; feng Zhouc
- 关键词：HCl/HF leaching ; Multiple extraction ; Structural change ; FTIR ; Curve&ndash ; fitting technique ; Interaction mechanism
- 刊名：Fuel Processing Technology
- 出版年：2016
- 出版时间：15 December 2016
- 年：2016
- 卷：154
- 期：Complete
- 页码：210-218
- 全文大小：749 K
文摘
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Acids leaching had no significant impact on the IR spectra of coals.
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Contents of C and organic portions containing C
C vibration mode in coals decreased after extraction.- •
Aliphatic chains in SD, HLJ and NX coals became longer after extraction.
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Detectable content of hydroxy groups in coals increased after extraction processes.
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ME with solvents in the order of CYC-NMP/CS2 was more effective than single step.