In situ synchrotron diffuse reflectance infrared fourier-transform spectroscopy study on functional group evolution during coal pyrolysis: Effect of temperature and inherent minerals
Chen J. Xu T. Wu Y. Sadvakasova A.K.
March 2026Elsevier B.V.
Results in Engineering
2026#29
Inorganic minerals in coal can influence the migration of functional groups during pyrolysis. In situ synchrotron diffuse reflectance infrared Fourier-transform spectroscopy was employed to investigate the influence of temperature and inherent minerals on the evolution of functional groups during pyrolysis at 50 °C–500 °C. In situ spectroscopy observed that during the pyrolysis process, the organic molecular structure in coal underwent cleavage and reorganization, leading to the gradual release of functional groups originally embedded within the coal, which then diffused to the surface. The inherent minerals in coal impeded the cleavage of aliphatic chains, increasing the initial temperature of cleavage reaction for the formation of hydrocarbons from methyl and methylene groups by 150 °C. Additionally, the removal of minerals introduced more oxygen-containing structure and enhanced the aromatization of aliphatic hydrocarbons and the condensation of aromatic compounds. The maximum increase in the degree of condensation of aromatic rings during the pyrolysis of acid-washed coal occurred between 100 °C and 250 °C, rising from 0.35 to 0.58.
Coal , Functional group , In situ drifts , Inherent minerals , Pyrolysis
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College of Energy and Mining Engineering, Xi’an University of Science and Technology, Shaanxi, 710054, China
Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
College of Energy and Mining Engineering
Faculty of Biology and Biotechnology
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026