Fourier transform infrared photoacoustic spectroscopy of raw coal

✍ Scribed by Tiziana Zerlia

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 370 KB
• Volume: 64
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(85)90194-2

✦ Synopsis

Photoacoustic

Fourier transform infrared (PA-FT-i.r.) spectrometry was employed to examine raw coal containing 1344 wt%, daf volatile matter (VM). Sample preparation for i.r. examination was the same as for ASTM proximate analysis. Technological and spectroscopic information on representative samples were obtained. PA scan time is longer than for conventional FT-i.r. operation; however sample preparation is faster and easier. The time-consuming KBr pellet technique, possibly affecting coal structure, is avoided. The i.r. absorption in the OH, NH, CH,, and CH,,, regions may allow the determination of VM for both high-and low-rank coal. Some differences between present PA and diffuse reflectance spectra of raw coal from the literature are discussed.