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An in situ pyrolysis reactor combined with the Fourier transformation infrared spectrometer (PFTIR) technique is employed to study the coal structure and its thermal decomposition behaviors. The interface of pyroprobe with FTIR was designed delicately to ensure the path of the laser beam in FTIR was just 3 mm above the coal sample, so any detection information of products from coal pyrolysis would be acquired previous to the secondary reaction. The PFTIR technique can be adopted to determine the activation energy of coal pyrolysis. Lignite coal has been used to evaluate this new method. The thermal decomposition behaviors of functional groups from lignite pyrolysis coincide with the first-order reaction.
Acknowledgments
Financial support for this project came from NNSF of China No. 90410018 and the Special Funds for Major State Basic Research Projects G1999022101 and 2004CB217602. Wen-Ying Li thanks the Shanxi Natural Science Foundation No. 981024 and No. 20041008. Jie Feng thanks the Shanxi Returned Scholar Foundation No. 200029 and 211 Project from Taiyuan University of Technology.