화학공학소재연구정보센터
Reaction Kinetics and Catalysis Letters, Vol.78, No.1, 81-89, 2003
Catalytic properties of zeolites MCM-22 and NU-87 in disproportionation of toluene
The catalytic properties of MCM-22 and NU-87 were investigated for the disproportionation of toluene to produce benzene and xylene, and the results were compared with those obtained over mordenite, beta and ZSM-5. It turns out that dealumination of MCM-22 removes selectively the acid sites from the external surface and thus suppresses the secondary isomerization of p-xylene, enhancing the para-selectivity. This indicates that the dealuminated MCM-22 is a promising catalyst for the selective formation of p-xylene from toluene disproportionation.