Gas-phase oxidative dehydrogenation of cyclohexanol over ETS-10 and related materials

The gas-phase oxidative dehydrogenation of cyclohexanol with air using ETS- 10 and related materials is studied. At reaction temperatures below 200 deg reesC, ETS-10 was 100% selective to cyclohexanone and 75% cyclohexanol conv ersion was achieved. Catalyst deactivation was attributed to pore blockage. The catalyst is completely regenerated by calcination at 400 degreesC. Cyc lohexanol conversion increases with temperature and oxygen/cyclohexanol fee d ratios. The introduction of Cr, Fe, K, or Cs in ETS-10 affects stability and decreases conversion and selectivity towards cyclohexanone. For compari son, some results on TS-1, zeolites NaX, and mordenite are also presented. (C) 2001 Academic Press.