The use of step scan FT-IR/PAS for the study of structural changes in coal and char particles during gasification

Journal Article · Tue Dec 31 04:00:00 EST 1996 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry

OSTI ID:433097

Yamada, Osamu; Yasuda, Hajime; Soneda, Yashushi ^[1]

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1. National Institute for Resources and Environment, Tsukuba, Ibaraki (Japan); and others

To understand the reactions occur during coal gasification, it is essential to investigate reactivity and structural changes in coal and char. As coal and char are solid which hardly dissolve into most of solvents, variety of applicable methods for analyses is limited. An FT-IR spectroscopy is a promising method to detect the status of various kinds of functional groups and their chemical and physical changes. Recently, FT-IR photoacoustic spectroscopy (FT-IR/PAS) of coal has been intensively studied. Depth profiling analyses using FT-IR/PAS is also discussed focusing on the technique to avoid a saturation of the photoacoustic signal. In this paper, a step scan FT-IR/PAS with a phase modulation was applied to depth profiling of coal particles whose surfaces were treated by oxidation and ion-irradiation to elucidate a sampling depth. Depth profile of gasification char particles obtained from HYCOL entrained flow type gasifier were analyzed by step scan FT-IR/PAS.

• OSTI ID: 433097
• Report Number(s): CONF-960376--
• Journal Information: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 1 Vol. 41; ISSN 0569-3772; ISSN ACFPAI
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHARS
COAL
COAL GASIFICATION
INFRARED SPECTRA
MOLECULAR STRUCTURE
OXIDATION
PHOTOACOUSTIC SPECTROSCOPY
SOLVENTS