Pyrolysis of Propyne/2‐Methylbut‐1‐ene‐3‐yne mixtures between 350 and 450°C

Abstract

Abstract2‐Methylbut‐1‐ene‐3‐yne and Propyne mixtures were pyrolyzed at 350–450°C in the absence and presence of O2 and NO. The major product of the reaction is a polymer, but m‐xylene and p‐xylene are also produced and were studied as the species of interest. The C8H10 formation rate is first‐order in C3H4 and C5H6. The rate coefficient is best fitted by though it is not inconsistent with where R is the ideal gas constant in kJ/mol‐K. Experiments in the presence of NO show that m‐xylene and p‐xylene formation occur by two processes: a concerted molecular mechanism (≃ 41%) and a singlet diradical mechanism (≃ 59%).