Decarboxylation as a means of upgrading the heating value of low-rank coals
β Scribed by Douglas C. Elliott
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 254 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0016-2361
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β¦ Synopsis
nation over combination pathways as temperatures increase. Since radical-radical combination and radical addition to aromatic systems are commonly thought of as char-forming mechanisms, high temperatures and very short temperature rise times should minimize char formation.
Finally, this work has shown that /?-scission and fragmentation can occur to a significant degree at temperatures commonly employed in coal liquefaction. Thus, it may be expected that /?-scissions and rearrangements of coal-derived radicals occur to a significant degree if radical initiation pathways exist.
π SIMILAR VOLUMES
A low-rank coal is examined for swelling in benzene-pyridine and toluene-pyridine mixtures. In each case, swelling is shown to be mainly due to the pyridine, the action of which is specific and not amenable to interpretation by the solubility parameter approach to understanding coal swelling.
Victorian brown coals from Loy Yang, Yallourn and Yallourn North Extension open cut mines were studied. When these coals are used as ion exchange materials, their ionic selectivities follow the Irving-Williams order for metals from the first transition metal series, i.e. Mn < Co < Ni Zn. The cation