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Free radicals in coals and coal conversion. 2. Effect of liquefaction processing conditions on the formation and quenching of coal free radicals

โœ Scribed by Leon Petrakis; David W. Grandy

Book ID
107755595
Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
660 KB
Volume
59
Category
Article
ISSN
0016-2361

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๐Ÿ“œ SIMILAR VOLUMES

Free radicals in coals and coal conversi
Free radicals in coals and coal conversion. 3. Investigation of the free radicals of selected macerals upon pyrolysis
โœ Leon Petrakis; David W. Grandy ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 546 KB

The nature and concentration of free radicals in natural and pyrolysed samples of several high-purity resinites, vitrinites and fusinites have been determined by electron spin resonance (e.s.r.) spectrometry. Careful measurements of theg-values, linewidths and integrated intensities have been made.

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The results of conversion determinations on the products from Powhatan No.5 coal liquefied in an autoclave and in a high-pressure, high-temperature e.s.r. cavity are reported. Oil, asphaltene and preasphaltene yields, and overall conversion have been determined for Powhatan No.5 coal samples liquefi

Effect of pyrite and pyrrhotite on free
Effect of pyrite and pyrrhotite on free radical formation in coal
โœ Gopalan Srinivasan; Mohindar S. Seehra ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 371 KB

The effects of pyrite (FeS,) and pyrrhotite (Fe+,) on free radical formation in a coal sample (81% carbon content) have been investigated by electron spin resonance (e.s.r.) spectroscopy. Changes in the e.s.r. parameters (spin concentration g-', n, linewidth M and g-value) were monitored in samples

Free radicals in coal and coal conversio
Free radicals in coal and coal conversions. 5. Methodology for the in-situ investigation of free radicals in coal depolymerization under SRC-II preheater/reactor conditions
โœ Leon Petrakis; D.W. Grandy; R.G. Ruberto ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 477 KB

In a continuing series of publications, a systematic investigation of the free radicals during coal depolymerization under SRC-II preheater/reactor conditions has been made. A uniquely designed electron spin resonance (e.s.r.) cavity allows the monitoring of free radicals and how they are affected b