Thermal cracking of n-butylbenzene at high pressure: Experimental study and kinetic modelling

摘要

The thermal cracking of n-butylbenzene was experimentally studied at high pressure (70 MPa), and moderate temperatures (583, 603, 623 K), for conversions of n-butylbenzene ranging between 0.7% and 62%. The pyrolysis was performed in sealed isobaric gold tubes (confined pyrolysis). Three main chemical families were observed: short alkylbenzenes (mostly toluene and ethylbenzene), branched alkylbenzenes (isomers of iso-butylbenzene and iso-heptylbenzene) and short alkanes (from CH4 to C4H10). As minor products, alkenylbenzenes (styrene and butenylbenzene), methylindane and biaromatic structures were also quantified.