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论文类型：期刊论文

发表时间：2015-09-01

发表刊物：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

收录刊物：SCIE、EI

卷号：115

页面范围：262-267

ISSN号：0165-2370

关键字：Brown coal; FT-IR spectroscopy; In-situ pyrolysis; Weak covalent bond; Curve fitting

摘要：In situ diffuse reflectance infrared fourier transform spectroscopy (DRIFTS) was used to characterize the thermal decomposition of the functional groups in Huolinhe brown coal. The PeakFit program for curve fitting was used to analyze the overlapped IR bands. The formation and decomposition of the functional groups show different trends during the heat treatment. The methyl and carboxyl groups decomposed with increasing the temperature, which is closely related to the release of CO2, CH4. The amounts of ester and anhydride groups rise reach a maximum then fall. Different types of OH hydrogen bonds were also observed after the absorbed water was removed at high temperature. The results indicate that the curve-fitting analysis well represents the change in the chemical bonds in coal. (C) 2015 Elsevier B.V. All rights reserved.