1979•University of North Texas Digital Library (University of North Texas)Open access

Modulated molecular beam mass spectrometric studies of the high temperature pyrolysis of hydrocarbons

Richard Smith

Abstract

The pyrolysis products of benzene and toluene were studied as functions of temperature (up to 2000/sup 0/C) and pressure. Above 1400/sup 0/C, most of the larger species are unstable; above 1700/sup 0/C, no species heavier than C/sub 6/H/sub 6/ are observed at any pressure. Above 1500/sup 0/C and at higher pressures, the products are dominated by species containing even numbers of carbon atoms (C/sub 2/ to C/sub 12/). While polyacetylenes up to C/sub 8/H/sub 2/ were observed, they are present in low abundances, with the max concentrations occurring at 1350/sup 0/C. Polycyclic aromatic hydrocarbons are formed readily. 6 figures. (DLC)

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Key concepts: Toluene, Pyrolysis, Benzene, Chemistry, Hydrocarbon, Analytical Chemistry (journal), Carbon fibers, Mass spectrum