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Cover Picture: Competitive Reactions of Organophosphorus Radicals on Coke Surfaces (Chem. Eur. J. 43/2011)
Author(s) -
Catak Saron,
Hemelsoet Karen,
Hermosilla Laura,
Waroquier Michel,
Van Speybroeck Veronique
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201190210
Subject(s) - coke , radical , cracking , chemistry , hydrocarbon , organic chemistry , chemical engineering , photochemistry , engineering
Organophosphorus additives are used as coke‐inhibiting agents to reduce coking, an undesirable process that occurs in cracking units. DFT calculations show that organophosphorus radicals compete with coke‐inducing carbonaceous radicals for the peripheral sites of the growing coke layer. The figure illustrates the organophosphorus radical that adds to the edge of the growing polyaromatic hydrocarbon, strategically blocking the peripheral site, preventing further coke growth. For more details see the Full Paper by S. Catak, V. Van Speybroeck et al. on page 12027 ff.