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Polymeric structure of coal. 1. Role of ether bonds in constitution of high-rank vitrinite

โœ Scribed by Boleslaw S. Ignasiak; Mieczyslawa Gawlak

Book ID
103092964
Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
873 KB
Volume
56
Category
Article
ISSN
0016-2361

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โœฆ Synopsis

Results of detailed studies on molecular weights of products from reductive alkylation of high-rank vitrinite are reported. It is concluded that the macromolecular network of vitrinite from a Cretaceous bituminous coal is composed of relatively small units (no. av. mol. weight 600-700) which are primarily linked by ether oxygen. A significant portion of these units (~20 weight percent) is characterized by molecular weight substantially below 500. These findings seem to be consistent with results from mild hydrogenolysis and air oxidation of bituminous coals.

๐Ÿ“œ SIMILAR VOLUMES

Polymeric structure of coal. 3. Re-exami
Polymeric structure of coal. 3. Re-examination of the role of ether bonds in reduction of molecular weight of a low-rank vitrinite treated with hydrogen donor
โœ Dennis W. Carson; Boleslaw S. Ignasiak ๐Ÿ“‚ Article ๐Ÿ“… 1980 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 582 KB

Although available literature does not unequivocally establish the presence of open ether bonds (R-O-R) in low-rank bituminous coals, formation of low-molecular-weight products on reacting such coals with hydrogen donors is usually interpreted in terms of scission of ether bridges. This lack of cons