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Hydropyrolysis under pressure of a low temperature tar phenolic fraction

✍ Scribed by René Cyprès; Colette Braekman-Danheux; Anne Progneaux; Philippe Englebert

Book ID
103092461
Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
399 KB
Volume
68
Category
Article
ISSN
0016-2361

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✦ Synopsis

Hydrocracking

of the phenolic fraction of a low temperature tar was studied as a function of temperature, pressure, and residence time to determine the yields of light aromatic hydrocarbons (BTX) and phenol and cresols (PC) under coal hydropyrolysis conditions. The results confirm those obtained on model compounds and show that the cracking of the phenolic fraction gives more than 35% of PC at 800°C 1 MPa and 1.2 s residence time and almost 30% of BTX at 8OO"C, 1 MPa and 2.5 s residence time. The relative importance of the parameters studied has also been pointed out.

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Low temperature NMR study of CeAl3 under
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✍ M. Weller; J.L. Gavilano; A. Sacchetti; H.R. Ott 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 151 KB

Results of 27 Al-NMR measurements on the heavy-electron compound CeAl 3 , recorded in low magnetic fields (of the order of 1 kG), very low temperatures ðTo1:5 KÞ, and at hydrostatic pressures up to 5.6 kbar are presented. We observe drastic changes of the NMR spectra and of the spin-lattice relaxati