Abstract:

The one-step process to produce toluene and para-xylene through the alkylation reaction of benzene with syngas has been developed for the first time. Using 2wt% Pt/ZSM-5 zeolite as catalyst, the conversion of the benzene has reached 9.04% and the total selectivity of toluene and para-xylene is 82.85%, especially the selectivity of para-xylene is 9.18%. The optimized reaction condition is as follows: 500 ℃, 3.0 MPa, WHSV=3 h-1 and GHSV=12 000 cm3/(g?h). The catalyst catalysts were characterized by XRD,BET,TEM,NH3-TPD,H2-TPR and XPS to indicate the properties of catalyst, which will provide the foundation for the further study of this one-step process.

Key words: Pt/ZSM-5, benzene, syngas, alkylation