Raman studies of coals

✍ Scribed by Tadeusz W. Zerda; Andrzej John; Kazimierz Chmura

• Book ID: 103091191
• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 505 KB
• Volume: 60
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(81)90272-6

✦ Synopsis

Raman spectra were used to estimate the sizes of microcrystalline regions in coal. A variety of different Polish coals were investigated by means of the laser Raman technique. To prevent decomposition of the coals in the laser beam, the rotating disc technique was used to obtain the spectra. Some i.r. spectra of the coals under investigation were also considered. The aromatic carbon content was determined by the method of Oelert. The results of both spectroscopic techniques were compared and found to lead to the same order of magnitude of microcrystalline regions. The Tuingstra and Koenig method used for evaluation of microcrystalline regions in coal was found to be applicable if infrared studies indicate a high value of the aromaticity coefficient, i.e. if aromatic bonds are predominant in the coal under investigation.