A Ga/Nd/ZSM-5 catalyst suitable for C-6- olefin-rich streams aromatisation has been developed. Evidences about the phenomena affecting the stability of this catalyst has been gathered by analysing the modifications induced on the material after several reaction and regeneration lab-scale operations (about 900 h time-on-stream on a fixed-bed reactor). Both catalytic results and evidences from physico-chemical characterisations are reported. (C) 2004 Elsevier B.V. All rights reserved.