| abstract |
A catalyst composition comprising a zeolite, an alumina binder, and a Group 12 transition metal selected from Zn and/or Cd, the zeolite having a Si/Al ratio of at least about 10 and a micropore surface area of at least about 340 m 2 /g, the catalyst composition comprising about 50 wt% or less of the binder, based on a total weight of the catalyst composition, and having a micropore surface area of at least about 290 m 2 /g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, and at least one of: a mesoporosity of about 20 m 2 /g to about 120 m 2 /g; a diffusivity for 2,2-dimethylbutane of greater than about 1 x 10 -2 sec -1 when measured at a temperature of about 120°C; and a 2,2-dimethylbutane pressure of about 60 torr (8kPa); and a combined micropore surface area and mesoporosity of at least about 380m 2 /g. |