The influence of sulfur compounds on the process pyrolysis kinetics of alkylbenzenes

摘要

The reaction inetics of alkyl aromatics and various sulfur compounds likely present in petroleum were explored through literature,theoretical and experimental analyses of compyrolysis of pentadecylbenzene and sulfur model compounds. The literature survey showed that the binary pyrolysis of PDB and sulfur compounds is important not only theoretically but also from a practical,process chemistry point of view. Experimentally,the temporal variations of the products permitted deduction of the reaction kinetics.The disappearance rate followed first-order kinetics for both neat PDB and the binary mixtures.Arrhenius parameters were also determined over the temperature range of 400-450 deg C.The overall activation energy for conversion of PDB,in the presence of the sulfur compound,decreased with increasing initial concentration of hexylsulfide,decylmercaptane,or thiophene.Pentadecylbenzene and the binary mixture copyrolysis experiments yielded insight into the influence of key sulfur compounds on the reactivity of alky aromatic hydrocarbons.