Thermal cleavage of chemical bonds in selected coal-related structures

✍ Scribed by Ben M. Benjamin; Vernon F. Raaen; Paul H. Maupin; Lloyd L. Brown; Clair J. Collins

• Book ID: 103092976
• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 523 KB
• Volume: 57
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(78)90003-0

✦ Synopsis

Solvent-refined coal is produced in processes in which coal is heated with hydrogen-donor solvents. From it, oil, asphaltene, and preasphaltene fractions can be separated. The sizes of the molecules in these fractions are smaller than the sizes of those in the starting coal; the smaller sizes result from bond-breaking reactions. We have investigated the bond-breaking processes by determining what kinds of bonds rupture when each of a large number of carefully selected model compounds was subjected to the conditions of asphaltene formation. Both tetralin and vitrinite from Illinois No. 6 coal were used as hydrogen donors. The products of chemical breakdown of the model compounds are presented in several Tables. Relative rates of cleavage of some selected compounds were also determined. The information obtained is discussed in relation to structural features of coal.