Comparative Study of the Modification of Coal Tar Pitch for Higher Carbonization Yield and Better Properties

doi:10.1016/S1004-9541(13)60634-5

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (12): 1391-1396.DOI: 10.1016/S1004-9541(13)60634-5

• 能源、资源与环境技术 • 上一篇下一篇

Comparative Study of the Modification of Coal Tar Pitch for Higher Carbonization Yield and Better Properties

张文娟, 李铁虎, 卢萌, 侯翠岭

Department of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China

收稿日期:2012-05-03 修回日期:2012-07-29 出版日期:2013-12-28 发布日期:2013-12-27
通讯作者: LI Tiehu
基金资助:
Supported by the Natural Science Foundation of Shaanxi Province (2009GM6001-1) and the Foundation for Fundamental Research of Northwestern Polytechnical University (JC201030).

Comparative Study of the Modification of Coal Tar Pitch for Higher Carbonization Yield and Better Properties

ZHANG Wenjuan, LI Tiehu, LU Meng, HOU Cuiling

Department of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received:2012-05-03 Revised:2012-07-29 Online:2013-12-28 Published:2013-12-27
Contact: LI Tiehu
Supported by:
Supported by the Natural Science Foundation of Shaanxi Province (2009GM6001-1) and the Foundation for Fundamental Research of Northwestern Polytechnical University (JC201030).

摘要/Abstract

摘要： Parent coal tar pitch (CTP) was modified with boric acid (BA), cinnamaldehyde (CMA) and the mixture of BA and CMA, respectively. The parent CTP and three modified CTPs were characterized by elemental analysis, thermogravimetric analysis, Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy. The four samples were carbonized at different temperatures and resultant carbonized products were characterized by FT-IR spectroscopy, X-ray diffraction and polarized-light microscopy. The results show that the morphologies and carbonization behaviors of the parent CTP and modified CTPs are quite different. The carbonization yield of the CTP modified with the mixture of BA and CMA is higher than that of CTP modified with BA or CMA only. In addition, the modification of CTP with 7 g of BA and 10 ml of CMA results in an increase in carbonization yield by 5.64%. During the pyrolysis of modified CTPs, the dehydration of BA or the distillation of CMA occurs at the temperature lower than 300 ℃, and methyl and methylene groups of the modified CTPs disappear gradually as temperature rises. Furthermore, the modification of CTP by the mixture of BA and CMA results in more intensive mesophase spheres than other modified CTPs, and the modified CTP is easier to be carbonized to form graphitic carbon.

关键词: coal tar pitch, cinnamaldehyde, boric acid, carbonization

Abstract: Parent coal tar pitch (CTP) was modified with boric acid (BA), cinnamaldehyde (CMA) and the mixture of BA and CMA, respectively. The parent CTP and three modified CTPs were characterized by elemental analysis, thermogravimetric analysis, Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy. The four samples were carbonized at different temperatures and resultant carbonized products were characterized by FT-IR spectroscopy, X-ray diffraction and polarized-light microscopy. The results show that the morphologies and carbonization behaviors of the parent CTP and modified CTPs are quite different. The carbonization yield of the CTP modified with the mixture of BA and CMA is higher than that of CTP modified with BA or CMA only. In addition, the modification of CTP with 7 g of BA and 10 ml of CMA results in an increase in carbonization yield by 5.64%. During the pyrolysis of modified CTPs, the dehydration of BA or the distillation of CMA occurs at the temperature lower than 300 ℃, and methyl and methylene groups of the modified CTPs disappear gradually as temperature rises. Furthermore, the modification of CTP by the mixture of BA and CMA results in more intensive mesophase spheres than other modified CTPs, and the modified CTP is easier to be carbonized to form graphitic carbon.

Key words: coal tar pitch, cinnamaldehyde, boric acid, carbonization

张文娟, 李铁虎, 卢萌, 侯翠岭. Comparative Study of the Modification of Coal Tar Pitch for Higher Carbonization Yield and Better Properties[J]. Chinese Journal of Chemical Engineering, 2013, 21(12): 1391-1396.

ZHANG Wenjuan, LI Tiehu, LU Meng, HOU Cuiling. Comparative Study of the Modification of Coal Tar Pitch for Higher Carbonization Yield and Better Properties[J]. Chin.J.Chem.Eng., 2013, 21(12): 1391-1396.

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Comparative Study of the Modification of Coal Tar Pitch for Higher Carbonization Yield and Better Properties

Comparative Study of the Modification of Coal Tar Pitch for Higher Carbonization Yield and Better Properties

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