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HERO ID
2343328
Reference Type
Journal Article
Title
Low-Temperature Oxidation of Methylene Bridge Bond in Coal by Model Compound
Author(s)
Tang, Y; Li, Z; Tien, JC; Yin, W; Ma, D
Year
2014
Is Peer Reviewed?
Yes
Journal
Asian Journal of Chemistry
ISSN:
0970-7077
EISSN:
0975-427X
Volume
26
Issue
3
Page Numbers
795-798
Language
English
DOI
10.14233/ajchem.2014.15546
Web of Science Id
WOS:000332688200037
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84900431617&doi=10.14233%2fajchem.2014.15546&partnerID=40&md5=03716229496be3fc5a0f317e6ced8886
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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
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