Activation by H-abstraction

The reaction depicted by Eq. 5 can be called activation by H-abstraction , which is often analogous to electron-transfer activation . Examples of the latter (in which X-S + or X-S are produced) will also be presented (Section 9.5) but only in heterolysis is ET taking place between X and S [40, 41]. 

Surface growth mainly takes place via reactions with acetylene, PAH and PAH radicals to soot nuclei activated by H-abstraction as well as PAH radicals to parent BINs. Soot particle coagulation is the result of addition reactions between BINs and BIN radicals, recombination reactions of BIN radicals and, lastly, interactions between heavy BIN species. 

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