Abstract

AbstractPyrolysis of p‐xylene was carried out in a tubular reactor at partial pressures varying from 0.184 kPa to 2.199 kPa with steam as a diluent. The product stream was quenched in toluene, and the solid products formed in quenching were shown to consist of p‐cyclophane (acetone insoluble) and linear dimer, linear trimer and one immovable component (in TLC analysis) constituting the acetone‐soluble part. Their rates of formation in the quencher were experimentally determined. The kinetic model which was used to explain the rate data of p‐cyclophane formation(1) was extended to include the formation of linear dimer and trimer of p‐xylene. The rate expressions derived from the kinetic model were shown to be consistent with experimental results.

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