Elementary Processes in Combustion and Sooting of Coal Derived Fuels. Progress Report: 2nd Year, 1st Quarter, August 10-November 9, 1983

摘要

In the discussion of soot formation in aromatic hydrocarbons, the pyrolysis of the ring systems to smaller radicals and ions and C sub 2 and C sub 3 hydrocarbons is an important aspect. These small fragments subsequently recombine to larger systems in the cooler regions of the flame or engine to generate large ring systems of low H/C ratios. We are examining the attack on benzene of radicals and now report work on some preliminary studies involving reactions of :CH sub 2 and benzene. This reaction has been examined in many condensed phase studies and we are now addressing two problems; the efficiency of the reaction and the chemical intermediates. As part of our efforts to develop real time monitors of phenyl radicals using multiphoton ionization (MPI) techniques, we were able to model the ionization pathways in considerable detail. In our combustion studies, we generate phenyl radicals using ir laser-induced decomposition of bromobenzene and we are now able to follow this precursor's concentration with our MPI probe. (ERA citation 10:019854)