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Vol. 26 No. 3 (2014): Vol 26 Issue 3

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Low-Temperature Oxidation of Methylene Bridge Bond in Coal by Model Compound

https://doi.org/10.14233/ajchem.2014.15546
Yibo Tang
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221008, Jiangsu Province, P.R. China ;Mining & Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO 65401, USA
Zenghua Li
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221008, Jiangsu Province, P.R. China
Jerry C. Tien
Mining & Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO 65401, USA
Wenxuan Yin
School of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, Jiangsu Province, P.R. China
Dongjuan Ma
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221008, Jiangsu Province, P.R. China

Corresponding Author(s) : Yibo Tang

tangyibo11@126.com

Asian Journal of Chemistry, Vol. 26 No. 3 (2014): Vol 26 Issue 3

Abstract

In order to find out characteristics of active structures in coal at early phase of oxidation, diphenylmethane was adopted as the model compound to study the oxidation properties of bridge bond (methylene) in coal with low-temperature experimental condition (293 K-423 K), according to structure of molecular coal. Mean while, the generated oxidation products under different reaction conditions were analyzed qualitatively via FTIR spectrometer and GC-MS. The results show that the new structures which involve C-O, C=O, Ar-O and Ar-OH are constantly generated with temperature rise in the process of low-temperature oxidation of diphenylmethane, especially after the 393 K. Besides, the phenols, benzaldehyde, diphenylmethanone, phenyl benzoate, 2-benzyl phenols and 2-phenolic-diphenylmethanone were detected in oxidation products, which demonstrated this oxidation is a multi-step reaction. Meantime, the substitution between O and H is more easily occurs in -CH2- than in benzene ring. The temperature and time are major factors which affecting low-temperature oxidation of diphenylmethane. In conclusion, this study provides reference for explaining and controlling the low-temperature oxidation of coal from chemical perspective.

Keywords

Low-temperature oxidation Methylene Diphenylmethane Model compound Spontaneous combustion
Tang, Y., Li, Z., C. Tien, J., Yin, W., & Ma, D. (2014). Low-Temperature Oxidation of Methylene Bridge Bond in Coal by Model Compound. Asian Journal of Chemistry, 26(3), 795–798. https://doi.org/10.14233/ajchem.2014.15546
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