Production of benzene, toluene and xylene was investigated by in situ contact reforming of low temperature tar from some coals with metallic ion-exchanged Y-zeolite as a catalyst in a gas-flow type thermobalance. BTX yields depended on the type of catalyst, on coal and also on reaction temperature. Ni-exchanged zeolite was found effective for relatively aromatic-abundant tar from PSOC 830 coal and it also showed the most appropriate temperature at around 650℃, while Zn-exchanged one was effective for lower aromatic tar from such as Taiheiyo coal. Since the exchange fraction of Ni ion had a large effect on BTX yield at around 50%, a better result is expected by further investigation.
