Aromatic hydrocarbons formation during coal pyrolysis
作者： R. Cypres
DOI: 10.1016/0378-3820(87)90030-0
关键词: Phenols 、 Naphthalene 、 Organic chemistry 、 Carbonization 、 Propene 、 Cyclopentadiene 、 Cyclopentadienyl complex 、 Cracking 、 Tar 、 Chemistry
摘要: Abstract The present paper demonstrates that the exclusive aromatic character of high temperature tar, is not only due to disappearance, by post-cracking, paraffinic fraction primary tars, but cracking reactions contribute form mono- and polycyclic aromatics. Aromatisation neutral acid oil fractions low was studied. main pathway compounds formation Diels-Alder reaction on short chain olefins, mainly butadiene propene. olefins are formed post-cracking long paraffins in tars cyclopentadiene, which one products phenols. These mechanisms were demonstrated pure investigate their fate occurring during coal carbonization. N-decane chosen as representative aliphatics 1,3-butadiene, 1-butene iso-butene for olefins. Phenols, labelled specific position carbon 14 tritium, cracked. Radiochromatography used determine radio-active content each products. Cyclopentadiene CO stable at phenols' temperatures. Direct naphthalene from cyclopentadiene observed temperatures 550°C. Fragments cyclopentadienyl radical undergo light
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William H. Calkins, Edward Hagaman, Henry Zeldes, Coal flash pyrolysis: 1. An indication of the olefin precursors in coal by CP/MAS 13C n.m.r. spectroscopy Fuel. ,vol. 63, pp. 1113- 1118 ,(1984) , 10.1016/0016-2361(84)90197-2
William H. Calkins, Ralph J. Tyler, Coal flash pyrolysis: 2. Polymethylene compounds in low temperature flash pyrolysis tars Fuel. ,vol. 63, pp. 1119- 1124 ,(1984) , 10.1016/0016-2361(84)90198-4
R. Cypres, B. Bettens, Pyrolyse thermique des [14C] et [3H] ortho et para-cresols Tetrahedron. ,vol. 31, pp. 353- 357 ,(1975) , 10.1016/0040-4020(75)80045-7
R. Cypres, B. Bettens, La formation de la plupart des composes aromatiques produits lors de la pyrolyse du phenol, ne fait pas intervenir le carbone porteur de la fonction hydroxyle Tetrahedron. ,vol. 31, pp. 359- 365 ,(1975) , 10.1016/0040-4020(75)80046-9
R CYPRES, C BRAEKMANDANHEUX, A PROGNEAUX, Hydropyrolysis of 2,4-xylenol under pressure Fuel. ,vol. 65, pp. 1300- 1304 ,(1986) , 10.1016/0016-2361(86)90245-0
R. Cypres, B. Bettens, Mecanismes de fragmentation pyrolytique du phenol et des cresols Tetrahedron. ,vol. 30, pp. 1253- 1260 ,(1974) , 10.1016/S0040-4020(01)97298-9
Colin E. Snape, William R. Ladner, Keith D. Bartle, Fate of aliphatic groups in low-rank coals during extraction and pyrolysis processes☆ Fuel. ,vol. 64, pp. 1394- 1400 ,(1985) , 10.1016/0016-2361(85)90341-2
R. Cyprés, C. Braekman-Danheux, R. Derie, M. Berkol, Aromatization of a C4 alkane/alkene/hydrogen mixture obtained by catalytic dehydrogenation of isobutane Journal of Analytical and Applied Pyrolysis. ,vol. 1, pp. 339- 346 ,(1980) , 10.1016/0165-2370(80)80017-9
Alexander Kossiakoff, Francis Owen Rice, Thermal Decomposition of Hydrocarbons, Resonance Stabilization and Isomerization of Free Radicals1 Journal of the American Chemical Society. ,vol. 65, pp. 590- 595 ,(1943) , 10.1021/JA01244A028
Francis Owen Rice, Ralph Roberts, The Structure of Diketene1 Journal of the American Chemical Society. ,vol. 65, pp. 1677- 1681 ,(1943) , 10.1021/JA01249A006